C语言学籍管理系统

由学生成绩管理系统修改，并且进一步完善，修复了学生管理系统的许多bug。

需求
（1） 系统启动后，弹出一个用户界面，能实现人机交互的功能。而且只能通过界面菜单命令实现各种功能（包括系统退出功能），可以设计欢迎词。
（2） 学生基本信息录入：录入信息包括学号、姓名、性别、宿舍号、电话号码等。
（3） 学生成绩基本信息录入: 学号、课程编号、课程名称、学分、平时成绩、实验成绩、卷面成绩。
（4） 计算综合成绩：若本课程无实验（如实验成绩为-1），综合成绩=平时成绩30% +卷面成绩70%；若本课程有实验（如实验成绩不为-1），综合成绩=平时成绩15%+实验成绩15%+卷面成绩*70%。
（5） 计算实得学分：采用等级学分制。综合成绩在90—100分之间，实得学分=学分x100%；综合成绩在80—90分之间，实得学分=学分x80%；综合成绩在70—80分之间，实得学分=学分x75%；综合成绩在60—70分之间，实得学分=学分x60%；综合成绩在60分以下，实得学分=学分x0%；
（6） 学生基本情况的查询并输出：输入一个学生的学号或姓名，可查询出此学生的基本信息并显示输出；输入一个宿舍号码，可查询出本宿舍所有学生的基本信息并显示输出。
（7） 学生成绩信息的查询并输出：输入一个学生的学号或姓名，可查询出此学生的所有课程情况。（如输出：学号，姓名，课程编号，课程姓名，综合成绩，实得学分等，并统计学生共修课程数目以及实得总学分值。）
（8） 排序（分别按综合成绩和实得学分），输出按照综合成绩（或实得学分）升序或降序排序后的学生信息以及对应的课程成绩信息（或实得学分信息）。
（9） 成绩修改：查找后修改成绩，修改后按照综合成绩重新排序，并输出学生信息和对应课程成绩和综合成绩。
（10） 成绩追加：增补遗漏的学生以及对应的信息和对应的课程成绩，并计算出综合成绩和实得学分，增补以后重新排序，并输出新增学生信息和对应课程成绩和综合成绩。

附加功能：
（11） 删除学生信息：删除不需要的学生对应的记录（包括姓名、学号、课程、成绩等）。
（12） 成绩（学分）分段：将学生成绩（学分）分段。
（13） 文件存储：把学生信息和对应的课程成绩信息存入到文件中。
（14） 文件输出：输出文件中的内容。
（15） 文件导入：从文件中导入数据到学籍管理系统中，然后进行管理。

代码

#include <stdio.h>
#include <windows.h> 
#include <stdlib.h>
#include <string.h>
#pragma warning(disable : 4996)//关闭编译器报错
struct basic//基础信息
{char id[30],name[10],sex[5],dom[5], tel[20];
};struct sco//基本成绩
{struct chinese//语文{char credit[5], daily[5], experi[5],paper[5];float overal=0, real_credit=0;bool has=false;}ch;struct math//数学{char credit[5], daily[5], experi[5], paper[5];float overal=0, real_credit=0;bool has=false;}ma;struct english//英语{char credit[5], daily[5], experi[5], paper[5];float overal=0, real_credit=0;bool has=false;}en;struct pysicalexercise//体育{char credit[5], daily[5], experi[5], paper[5];float overal=0, real_credit=0;bool has=false;}pe;struct softwareeng//专业{char credit[5], daily[5], experi[5], paper[5];float overal=0, real_credit=0;bool has=false;}se;float overal_aver=0,credit_aver=0;
};struct student//学生结构
{struct basic basic;//包含基础信息struct sco sco;//包含基本成绩
};
void Paint_Start();//绘制开始菜单
void insert_score();//成绩录入
void insert_info();//信息录入
void insert_File();//文件导入
void list();//排序输出
void find_info();//查找信息
void find_score();//查询成绩
void add();//添加条目
void del();//删除成绩
void savefile();//保存到文件，假保存，真效果
void outfile();//输出文件里的学生信息和成绩
void edit();//更改成绩，查找出来，再进行修改
void div();//成绩分段，分三段，我随意void end();//结束动画
int ifnum(char item[]);//用来在各模块中输入数字时，判断是不是数字
int main()
{system("color 02");//先打印个郑州轻工业大学图标纪念一下printf("\n\n\n\n\n\t\t\t\t\t                 *\n");printf("\t\t\t\t\t            *  ***  ****\n");printf("\t\t\t\t\t          *** **** ****\n");printf("\t\t\t\t\t         **** **** **** ****\n");printf("\t\t\t\t\t         **** **** **** ****\n");printf("\t\t\t\t\t         **** **** **** ****\n");printf("\t\t\t\t\t         **** **** **** ****\n");printf("\t\t\t\t\t         **** **** **** ****\n");printf("\t\t\t\t\t          **** ******* ****\n");printf("\t\t\t\t\t            *************\n");printf("\t\t\t\t\t                *****\n\n");printf("\t\t\t\t\t         欢迎使用学籍管理系统\n");printf("\n\n\n\n\n\n\n\n\n\n\t\t\t\t\t\t    ");system("pause");Paint_Start();//打印开始菜单，进入功能选择return 0;
} 
//绘制菜单
void Paint_Start()
{system("cls");printf("***********************************************************************************************************************\n");printf("*\t\t\t\t\t\t   学籍管理系统\t\t\t\t\t\t\t      *\n");printf("*\t\t1.信息录入\t\t2.成绩录入\t\t3.信息查询\t\t4.成绩查询\t\t      *\n");printf("*\t\t5.排序查看\t\t6.成绩修改\t\t7.成绩追加\t\t8.删除数据\t\t      *\n");printf("*\t\t9.成绩分段\t\t10.文件储存\t\t11.文件输出\t\t12.文件导入\t\t      *\n");printf("***********************************************************************************************************************\n\t\t\t\t\t\t <输入0炫酷退出>\n");printf("执行编号:");int num;//储存功能编号scanf("%d", &num);//接收编号，准备判断需求while (getchar() != '\n')continue;//忽略多余输入，类似清空缓冲区switch (num)//选择功能{case 0:end(); break;case 1:insert_info(); break;//信息录入case 2:insert_score(); break;//成绩录入case 3:find_info(); break;//信息查询case 4:find_score(); break;//成绩查询case 5:list(); break;//输出排序case 6:edit(); break;//修改成绩case 7:add(); break;//成绩和信息的追加case 8:del(); break;//删除数据case 9:div(); break;//成绩分段case 10:savefile(); break;//储存文件case 11:outfile(); break;//输出文件的内容case 12:insert_File(); break;//导入文件的内容到数据库default:printf("请选择对应的序号!"); system("pause"); Paint_Start();}
}
//录入成绩
void insert_score()
{system("cls");printf("\n\n\n\n\n\n\n\n\n\n\t\t\t\t    注意:请输入对应的正确内容，否则记录将出现错误！\n\n\t\t\t\t\t\t  ");//提示一下用户system("pause");system("cls");printf("*****************************************************成绩录入***********************************************************\n");printf("依次键入学号、课程编号(A-E)、课程名称(以编号为准)、学分、平时成绩、实验成绩、卷面成绩，用一个空格隔开各数据,每一条输入完成后按回车键进行下一条输入。\n\t\t\t\t\t\t<输入'#'并回车退出>\n例如：\n541913460230 A 语文 3 66 78 82\n");printf("在此输入：\n");student stu;char id[30],subid[5],subname[10],daily[5],credit[5],experi[5],paper[5];//定义变量储存输入值，用于判断，无错误则将其赋值给stu对应变量，最后把stu结构体写入文件bool err;FILE* fp;fp = fopen("stu.db", "rb+");//读写if (fp == NULL){printf("文件打开失败！\n");system("pause");Paint_Start();}while (1){err = false;//错误标记变量，初始为无错memset(id,0,30);//清空各数组所占内存的内容，都变成空，方便后续判断memset(subid,0,5);memset(subname,0,10);memset(credit,0,5);memset(daily,0,5);memset(experi,0,5);memset(paper, 0, 5);//这样以后，所有元素都变成\0了scanf("%s",id);if (id[0] == '#'){fcloseall();break;}scanf(" %s %s %s %s %s %s", subid, subname, credit, daily, experi, paper);while (getchar() != '\n')continue;if (ifnum(id) && id[11] != '\0' && id[12] == '\0');//是否是数字，是否符合12位数else{printf("请检查学号输入是否正确，并重新输入！\n");err = true;//若出错，则错误标记改为 错}if (subid[0] >= 'A' && subid[0] <= 'E' && subid[1] == '\0');//是否是数字，是否有效实际else{printf("请检查课程编号输入是否正确，并重新输入！\n");err = true;}if (ifnum(credit));else{printf("请检查学分输入是否正确，并重新输入！\n");err = true;}if (ifnum(daily) && ((daily[0] == '1' && daily[1] == '0' && daily[2] == '0') || (daily[2] == '\0' && daily[3] != '\0') || daily[2] == '\0'));else{printf("请检查平时成绩输入是否正确，并重新输入！\n");err = true;}if (ifnum(experi) && ((experi[0] == '1' && experi[1] == '0' && experi[2] == '0') || (experi[2] == '\0' && experi[3] != '\0') || experi[2] == '\0'));else{printf("请检查实验成绩输入是否正确，并重新输入！\n");err = true;}if (ifnum(paper) && ((paper[0] == '1' && paper[1] == '0' && paper[2] == '0') || (paper[2] == '\0' && paper[3] != '\0') || paper[2] == '\0'));else{printf("请检查卷面成绩输入是否正确，并重新输入！\n");err = true;}if (err == false){//此处写入磁盘文件int exist = 0;//是否存在同一个人的标记变量，用于查重标记while (fgetc(fp) != EOF){fseek(fp, -1L, 1);fread(&stu, 240, 1, fp);if (strcmp(stu.basic.id, id) == 0)//对比学号是否一样{exist = 1;//存在此人switch (subid[0])//根据录入的科目编号将各项成绩信息计算并存入stu结构体{case 'A':{stu.sco.ch.has = true;strcpy(stu.sco.ch.credit, credit);strcpy(stu.sco.ch.daily, daily);strcpy(stu.sco.ch.experi, experi);strcpy(stu.sco.ch.paper, paper);float credittemp;if (credit[2] == '0') credittemp = 100;else if (credit[1] != '\0')credittemp = ((int)credit[0] - 48) * 10 + (int)credit[1] - 48;else credittemp = (int)credit[0] - 48;float dailytemp, papertemp, experitemp;if (daily[2] == '0') dailytemp = 100;else if (daily[1] != '\0')dailytemp = ((int)daily[0] - 48) * 10 + (int)daily[1] - 48;else dailytemp = (int)daily[0] - 48;if (paper[2] == '0') papertemp = 100;else if (paper[1] != '\0')papertemp = ((int)paper[0] - 48) * 10 + (int)paper[1] - 48;else papertemp = (int)paper[0] - 48;if (strcmp(experi, "-1") == 0){stu.sco.ch.overal = dailytemp * 0.3 + papertemp * 0.7;}else{if (experi[2] == '0') experitemp = 100;else if (experi[1] != '\0')experitemp = ((int)experi[0] - 48) * 10 + (int)experi[1] - 48;else experitemp = (int)experi[0] - 48;stu.sco.ch.overal = dailytemp * 0.15 + experitemp * 0.15 + papertemp * 0.7;}if (stu.sco.ch.overal >= 90 && stu.sco.ch.overal <= 100)stu.sco.ch.real_credit = credittemp;else if (stu.sco.ch.overal < 90 && stu.sco.ch.overal >= 80) stu.sco.ch.real_credit = credittemp * 0.8;else if (stu.sco.ch.overal < 80 && stu.sco.ch.overal >= 70) stu.sco.ch.real_credit = credittemp * 0.75;else if (stu.sco.ch.overal < 70 && stu.sco.ch.overal >= 60) stu.sco.ch.real_credit = credittemp * 0.6;else stu.sco.ch.real_credit = 0;}; break;case 'B':{stu.sco.ma.has = true;strcpy(stu.sco.ma.credit, credit);strcpy(stu.sco.ma.daily, daily);strcpy(stu.sco.ma.experi, experi);strcpy(stu.sco.ma.paper, paper);float credittemp;if (credit[2] == '0') credittemp = 100;else if (credit[1] != '\0')credittemp = ((int)credit[0] - 48) * 10 + (int)credit[1] - 48;else credittemp = (int)credit[0] - 48;float dailytemp, papertemp, experitemp;if (daily[2] == '0') dailytemp = 100;else if (daily[1] != '\0')dailytemp = ((int)daily[0] - 48) * 10 + (int)daily[1] - 48;else dailytemp = (int)daily[0] - 48;if (paper[2] == '0') papertemp = 100;else if (paper[1] != '\0')papertemp = ((int)paper[0] - 48) * 10 + (int)paper[1] - 48;else papertemp = (int)paper[0] - 48;if (strcmp(experi, "-1") == 0){stu.sco.ma.overal = dailytemp * 0.3 + papertemp * 0.7;}else{if (experi[2] == '0') experitemp = 100;else if (experi[1] != '\0')experitemp = ((int)experi[0] - 48) * 10 + (int)experi[1] - 48;else experitemp = (int)experi[0] - 48;stu.sco.ma.overal = dailytemp * 0.15 + experitemp * 0.15 + papertemp * 0.7;}if (stu.sco.ma.overal >= 90 && stu.sco.ma.overal <= 100)stu.sco.ma.real_credit = credittemp;else if (stu.sco.ma.overal < 90 && stu.sco.ma.overal >= 80) stu.sco.ma.real_credit = credittemp * 0.8;else if (stu.sco.ma.overal < 80 && stu.sco.ma.overal >= 70) stu.sco.ma.real_credit = credittemp * 0.75;else if (stu.sco.ma.overal < 70 && stu.sco.ma.overal >= 60) stu.sco.ma.real_credit = credittemp * 0.6;else stu.sco.ma.real_credit = 0;}; break;case 'C':{stu.sco.en.has = true;strcpy(stu.sco.en.credit, credit);strcpy(stu.sco.en.daily, daily);strcpy(stu.sco.en.experi, experi);strcpy(stu.sco.en.paper, paper);float credittemp;if (credit[2] == '0') credittemp = 100;else if (credit[1] != '\0')credittemp = ((int)credit[0] - 48) * 10 + (int)credit[1] - 48;else credittemp = (int)credit[0] - 48;float dailytemp, papertemp, experitemp;if (daily[2] == '0') dailytemp = 100;else if (daily[1] != '\0')dailytemp = ((int)daily[0] - 48) * 10 + (int)daily[1] - 48;else dailytemp = (int)daily[0] - 48;if (paper[2] == '0') papertemp = 100;else if (paper[1] != '\0')papertemp = ((int)paper[0] - 48) * 10 + (int)paper[1] - 48;else papertemp = (int)paper[0] - 48;if (strcmp(experi, "-1") == 0){stu.sco.en.overal = dailytemp * 0.3 + papertemp * 0.7;}else{if (experi[2] == '0') experitemp = 100;else if (experi[1] != '\0')experitemp = ((int)experi[0] - 48) * 10 + (int)experi[1] - 48;else experitemp = (int)experi[0] - 48;stu.sco.en.overal = dailytemp * 0.15 + experitemp * 0.15 + papertemp * 0.7;}if (stu.sco.en.overal >= 90 && stu.sco.en.overal <= 100)stu.sco.en.real_credit = credittemp;else if (stu.sco.en.overal < 90 && stu.sco.en.overal >= 80) stu.sco.en.real_credit = credittemp * 0.8;else if (stu.sco.en.overal < 80 && stu.sco.en.overal >= 70) stu.sco.en.real_credit = credittemp * 0.75;else if (stu.sco.en.overal < 70 && stu.sco.en.overal >= 60) stu.sco.en.real_credit = credittemp * 0.6;else stu.sco.en.real_credit = 0;}; break;case 'D':{stu.sco.pe.has = true;strcpy(stu.sco.pe.credit, credit);strcpy(stu.sco.pe.daily, daily);strcpy(stu.sco.pe.experi, experi);strcpy(stu.sco.pe.paper, paper);float credittemp;if (credit[2] == '0') credittemp = 100;else if (credit[1] != '\0')credittemp = ((int)credit[0] - 48) * 10 + (int)credit[1] - 48;else credittemp = (int)credit[0] - 48;float dailytemp, papertemp, experitemp;if (daily[2] == '0') dailytemp = 100;else if (daily[1] != '\0')dailytemp = ((int)daily[0] - 48) * 10 + (int)daily[1] - 48;else dailytemp = (int)daily[0] - 48;if (paper[2] == '0') papertemp = 100;else if (paper[1] != '\0')papertemp = ((int)paper[0] - 48) * 10 + (int)paper[1] - 48;else papertemp = (int)paper[0] - 48;if (strcmp(experi, "-1") == 0){stu.sco.pe.overal = dailytemp * 0.3 + papertemp * 0.7;}else{if (experi[2] == '0') experitemp = 100;else if (experi[1] != '\0')experitemp = ((int)experi[0] - 48) * 10 + (int)experi[1] - 48;else experitemp = (int)experi[0] - 48;stu.sco.pe.overal = dailytemp * 0.15 + experitemp * 0.15 + papertemp * 0.7;}if (stu.sco.pe.overal >= 90 && stu.sco.pe.overal <= 100)stu.sco.pe.real_credit = credittemp;else if (stu.sco.pe.overal < 90 && stu.sco.pe.overal >= 80) stu.sco.pe.real_credit = credittemp * 0.8;else if (stu.sco.pe.overal < 80 && stu.sco.pe.overal >= 70) stu.sco.pe.real_credit = credittemp * 0.75;else if (stu.sco.pe.overal < 70 && stu.sco.pe.overal >= 60) stu.sco.pe.real_credit = credittemp * 0.6;else stu.sco.pe.real_credit = 0;}; break;case 'E':{stu.sco.se.has = true;strcpy(stu.sco.se.credit, credit);strcpy(stu.sco.se.daily, daily);strcpy(stu.sco.se.experi, experi);strcpy(stu.sco.se.paper, paper);float credittemp;if (credit[2] == '0') credittemp = 100;else if (credit[1] != '\0')credittemp = ((int)credit[0] - 48) * 10 + (int)credit[1] - 48;else credittemp = (int)credit[0] - 48;float dailytemp, papertemp, experitemp;if (daily[2] == '0') dailytemp = 100;else if (daily[1] != '\0')dailytemp = ((int)daily[0] - 48) * 10 + (int)daily[1] - 48;else dailytemp = (int)daily[0] - 48;if (paper[2] == '0') papertemp = 100;else if (paper[1] != '\0')papertemp = ((int)paper[0] - 48) * 10 + (int)paper[1] - 48;else papertemp = (int)paper[0] - 48;if (strcmp(experi, "-1") == 0){stu.sco.se.overal = dailytemp * 0.3 + papertemp * 0.7;}else{if (experi[2] == '0') experitemp = 100;else if (experi[1] != '\0')experitemp = ((int)experi[0] - 48) * 10 + (int)experi[1] - 48;else experitemp = (int)experi[0] - 48;stu.sco.se.overal = dailytemp * 0.15 + experitemp * 0.15 + papertemp * 0.7;}if (stu.sco.se.overal >= 90 && stu.sco.se.overal <= 100)stu.sco.se.real_credit = credittemp;else if (stu.sco.se.overal < 90 && stu.sco.se.overal >= 80) stu.sco.se.real_credit = credittemp * 0.8;else if (stu.sco.se.overal < 80 && stu.sco.se.overal >= 70) stu.sco.se.real_credit = credittemp * 0.75;else if (stu.sco.se.overal < 70 && stu.sco.se.overal >= 60) stu.sco.se.real_credit = credittemp * 0.6;else stu.sco.se.real_credit = 0;}//已经全部存入stu}fseek(fp, -240L, 1);fwrite(&stu, 240, 1, fp);break;}}if (exist == 0) printf("查无此人,请先录入该学生基本信息！\n");rewind(fp);}}fcloseall();Paint_Start();return;
}
void insert_info()
{system("cls");printf("\n\n\n\n\n\n\n\n\n\n\t\t\t\t    注意:请输入对应的正确内容，否则记录将出现错误！\n\n\t\t\t\t\t\t  ");system("pause");system("cls");printf("*****************************************************信息录入***********************************************************\n");printf("依次键入学号、姓名、性别、宿舍号码、电话号码，用一个空格隔开各数据,每一条输入完成后按回车键进行下一条输入。\n\t\t\t\t\t\t退出(输入'#'并回车)\n样例：\n541913460230 喵辰汐 男 113 10086\n");printf("在此输入：\n");FILE* fp;student stu;bool err;char id[30], name[10], sex[5]="", dom[5], tel[20];while (true){err = false;fp = fopen("stu.db", "rb+");if (fp == NULL){fp = fopen("stu.db", "wb");fclose(fp);fp = fopen("stu.db", "rb+");}memset(id,0,30);memset(name, 0, 10);memset(sex, 0, 5);memset(dom, 0, 5);memset(tel, 0, 20);scanf("%s",id);if (id[0] == '#'){fclose(fp);break;}scanf(" %s %s %s %s",name,sex,dom,tel);while (getchar() != '\n')continue;bool isname = true;for (int i = 0; i <= 7; i++){if (name[i] >= 32 && name[i] <= 127) isname = false;//仅判断是否是ASCII中的字符}if (name[8] == '\0' && isname == true)//一个中文字符占两个字节{strcpy(stu.basic.name, name);}else{printf("请检查姓名输入是否正确，并重新输入！\n");err = true;}if (ifnum(id) && id[11] != '\0' && id[12] == '\0') strcpy(stu.basic.id, id);else{printf("请检查学号输入是否正确，并重新输入！\n");err = true;}if (strcmp(sex, "男") == 0 || strcmp(sex, "女") == 0) strcpy(stu.basic.sex, sex);else{printf("请检查性别输入是否正确，并重新输入！\n");err = true;}if (ifnum(dom)) strcpy(stu.basic.dom, dom);else{printf("请检查宿舍号码输入是否正确，并重新输入！\n");err = true;}if (ifnum(tel)) strcpy(stu.basic.tel, tel);else{printf("请检查电话号码输入是否正确，并重新输入！\n");err = true;}if (err == false){int exist=0;student _stu=stu;while (fgetc(fp) != EOF)//遍历{fseek(fp, -1L, 1);fread(&_stu, 240, 1, fp);if (strcmp(_stu.basic.id, id) == 0)//找到相同项{exist = 1;printf("已有此人！\n");break;}}if (exist == 0)//文件指针已在末尾{fwrite(&stu, 240, 1, fp);//写入文件}}fclose(fp);}Paint_Start();
}
void insert_File()//文件导入
{char dir[50] = "";//存放 导入的文件的绝对路径的 字符串变量FILE* fp,*fpp;student stu;printf("输入文件的绝对路径(例如C:\\abc123.db):\n");scanf("%s", dir);//输入绝对路径while (getchar() != '\n')continue;//忽略多余输入if ((fpp = fopen("stu.db", "ab")) == NULL)//以二进制追加方式打开数据库文件{printf("数据库打开失败！\n");system("pause");Paint_Start();return;}if (fpp == NULL){fpp = fopen("stu.db", "wb");fclose(fpp);fpp = fopen("stu.db","ab");}if ((fp = fopen(dir, "rb"))==NULL)//以二进制只读方式打开要导入的文件{printf("所选文件打开失败！");system("pause");Paint_Start();return;}for (; fgetc(fp) != EOF;)//fp的文件位置往后读一字节看是不是读到EOF了，不是就再退一字节{fseek(fp,-1L,1);//fp位置退一字节fread(&stu, 240, 1, fp);fwrite(&stu, 240, 1, fpp);}printf("导入完成！");system("pause");fcloseall();Paint_Start();
}
void list()//排序查看
{FILE* fp;student stu;student* _stu = (student*) malloc(240 * 50);//临时数组用于储存读取的所有人数据，用来排序而不改变文件内容int num, i;fp = fopen("stu.db", "rb");//只读system("cls");printf("*****************************************************排序输出***********************************************************\n");printf("选择排序的选项，综合成绩(输入1)，实得学分(输入2)，按Enter键确认:\n");if (fp == NULL){printf("数据文件打开失败！\n");system("pause");Paint_Start();return;}for (i = 0; fgetc(fp) != EOF; i++)//计算学生数量{fseek(fp, -1L, 1);if (fread(&_stu[i], 240, 1, fp) != 1){printf("数据读取失败！\n");system("pause");fclose(fp);Paint_Start();return;}}for (int j=0; j<i;j++)//计算每个同学的平均成绩{_stu[j].sco.overal_aver = (_stu[j].sco.ch.overal + _stu[j].sco.ma.overal + _stu[j].sco.en.overal + _stu[j].sco.pe.overal + _stu[j].sco.se.overal) / 5.0;//平均综合成绩_stu[j].sco.credit_aver = (_stu[j].sco.ch.real_credit + _stu[j].sco.ma.real_credit + _stu[j].sco.en.real_credit + _stu[j].sco.pe.real_credit + _stu[j].sco.se.real_credit) / 5.0;//平均综合学分}scanf("%d", &num);while (getchar() != '\n')continue;if (num == 1)//按平均综合成绩排序{for (int j = 0; j < i - 1; j++)//起泡法排序{for (int k = 0; k < i - 1 - j; k++){if (_stu[k].sco.overal_aver < _stu[k + 1].sco.overal_aver){student temp = _stu[k + 1];_stu[k + 1] = _stu[k];_stu[k] = temp;}}}printf("以下为各个学生信息和学生的各科综合成绩、平均综合成绩:\n\n");printf("************************************************************************\n");printf("* 学号           姓名      语文   数学   英语   体育   专业   平均综合 *\n");for (int j = 0; j < i; j++){printf("* %-15s%-10s%-7.1f%-7.1f%-7.1f%-7.1f%-7.1f%-9.2f*\n", _stu[j].basic.id, _stu[j].basic.name, _stu[j].sco.ch.overal, _stu[j].sco.ma.overal, _stu[j].sco.en.overal, _stu[j].sco.pe.overal, _stu[j].sco.se.overal,_stu[j].sco.overal_aver);}printf("************************************************************************\n");}else if (num == 2)//按平均实得学分排序{for (int j = 0; j < i - 1; j++)//起泡法排序{for (int k = 0; k < i - 1 - j; k++){if (_stu[k].sco.credit_aver < _stu[k + 1].sco.credit_aver){student temp = _stu[k + 1];_stu[k + 1] = _stu[k];_stu[k] = temp;}}}printf("以下为各个学生信息和学生的各科实得学分、平均实得学分:\n\n");printf("************************************************************************\n");printf("* 学号           姓名      语文   数学   英语   体育   专业   平均实得 *\n");for (int j = 0; j < i; j++){printf("* %-15s%-10s%-7.1f%-7.1f%-7.1f%-7.1f%-7.1f%-9.2f*\n", _stu[j].basic.id, _stu[j].basic.name,_stu[j].sco.ch.real_credit, _stu[j].sco.ma.real_credit, _stu[j].sco.en.real_credit, _stu[j].sco.pe.real_credit, _stu[j].sco.se.real_credit,_stu[j].sco.credit_aver);}printf("************************************************************************\n");}else{printf("二选一！");system("pause");Paint_Start();}free(_stu);//释放内存fcloseall();system("pause");Paint_Start();
}
//查询信息
void find_info()
{student stu;int num;char item[30]="";//用于储存姓名或者学号 跟数据库条目对比FILE* fp;fp = fopen("stu.db", "rb");//只读if (fp == NULL){printf("数据库打开失败！\n");system("pause");Paint_Start();return;}printf("请选择查找方式，通过学号/姓名(输入1),宿舍号码(输入2)查找，按Enter键确认:\n");scanf("%d",&num);//选择查找方式while (getchar() != '\n')continue;if (num == 1)//姓名或学号{printf("选择通过学号(输入1),姓名(输入2)查找,按Enter键确认:\n");scanf("%d",&num);while (getchar() != '\n')continue;if (num == 1)//学号{printf("\t\t\t\t\t\t<键入'#'并回车退出>\n");int exist;while (1){exist = 0;printf("输入学号:");scanf("%s", item);while (getchar() != '\n')continue;if (item[0] == '#')//#则退出{fclose(fp);Paint_Start();}while (fgetc(fp) != EOF)//遍历{fseek(fp, -1L, 1);fread(&stu, 240, 1, fp);if (strcmp(stu.basic.id, item) == 0)//找到相同项就打印出来{exist = 1;printf("%-15s%-10s%-5s%-10s%-15s\n", "学号", "姓名", "性别", "宿舍号码", "电话号码");printf("%-15s%-10s%-5s%-10s%-15s\n\n", stu.basic.id, stu.basic.name, stu.basic.sex, stu.basic.dom, stu.basic.tel);//break;}}if (exist == 0) printf("查无此人！\n\n");rewind(fp);//关键！！}}else if (num == 2)//姓名{printf("\t\t\t\t\t\t<键入'#'并回车退出>\n");int exist;char item[10]="";while (1){exist = 0;printf("输入姓名:");scanf("%s", item);while (getchar() != '\n')continue;if (item[0] == '#')//#则退出{fcloseall();break;}while (fgetc(fp) != EOF)//遍历{fseek(fp, -1L, 1);fread(&stu, 240, 1, fp);if (strcmp(stu.basic.name, item) == 0)//找到相同项就打印出来{exist = 1;printf("%-15s%-10s%-5s%-10s%-15s\n", "学号", "姓名", "性别", "宿舍号码", "电话号码");printf("%-15s%-10s%-5s%-10s%-15s\n\n", stu.basic.id, stu.basic.name, stu.basic.sex, stu.basic.dom, stu.basic.tel);break;}}if (exist == 0) printf("查无此人！\n\n");rewind(fp);//关键！！}}else{printf("二选一！\n");system("pause");Paint_Start();}fcloseall();Paint_Start();}else{if (num == 2)//宿舍号码{char item[5] = "";fp = fopen("stu.db", "rb");if (fp == NULL){printf("数据库打开失败！\n");system("pause");Paint_Start();return;}int exist;printf("\t\t\t\t\t\t<键入'#'并回车退出>\n");while (1){exist = 0;printf("宿舍号码:");scanf("%s",item);while (getchar() != '\n')continue;if (item[0] == '#')//#则退出{fcloseall();//奇怪的问题，fclose无法关闭文件流，只有fcloseall可以break;}printf("%-15s%-10s%-5s%-10s%-15s\n", "学号", "姓名", "性别", "宿舍号码", "电话号码");while (fgetc(fp)!=EOF){fseek(fp,-1L,1);fread(&stu,240,1,fp);if (strcmp(stu.basic.dom, item) == 0){exist = 1;printf("%-15s%-10s%-5s%-10s%-15s\n", stu.basic.id, stu.basic.name, stu.basic.sex, stu.basic.dom, stu.basic.tel);}}if (exist == 0) printf("找不到这个宿舍的人！\n\n");else printf("\n");rewind(fp);//这个很关键！！}}else{printf("二选一噢~\n");//如果既没输1也没输2就打印它system("pause");}}fcloseall();Paint_Start();
}
//成绩查询
void find_score()
{student stu;int num;char item[30] = "";//用于储存姓名或者学号 跟数据库条目对比FILE* fp;fp = fopen("stu.db", "rb");if (fp == NULL){printf("数据库打开失败！\n");system("pause");Paint_Start();return;}printf("选择通过学号(输入1),姓名(输入2)查找,按Enter键确认:\n");scanf("%d", &num);while (getchar() != '\n')continue;if (num == 1)//学号{printf("\t\t\t\t\t\t<键入'#'并回车退出>\n");int exist;while (1){exist = 0;printf("输入学号:");scanf("%s", item);while (getchar() != '\n')continue;if (item[0] == '#')//#则退出{fcloseall();Paint_Start();return;}printf("***********************************************************************************************************************\n");while (fgetc(fp) != EOF)//遍历{fseek(fp, -1L, 1);fread(&stu, 240, 1, fp);if (strcmp(stu.basic.id, item) == 0)//找到相同项就打印出来{exist = 1;int n = 0;float finalcredit = 0;printf("学号:%-15s姓名:%-s\n\n", stu.basic.id, stu.basic.name);if (stu.sco.ch.has){printf("课程编号:A    课程名称:语文    综合成绩:%-10.2f实得学分:%-10.2f\n", stu.sco.ch.overal, stu.sco.ch.real_credit); n++;finalcredit = finalcredit + stu.sco.ch.real_credit;}if (stu.sco.ma.has){printf("课程编号:B    课程名称:数学    综合成绩:%-10.2f实得学分:%-10.2f\n", stu.sco.ma.overal, stu.sco.ma.real_credit); n++;finalcredit = finalcredit + stu.sco.ma.real_credit;}if (stu.sco.en.has){printf("课程编号:C    课程名称:英语    综合成绩:%-10.2f实得学分:%-10.2f\n", stu.sco.en.overal, stu.sco.en.real_credit); n++;finalcredit = finalcredit + stu.sco.en.real_credit;}if (stu.sco.pe.has){printf("课程编号:D    课程名称:体育    综合成绩:%-10.2f实得学分:%-10.2f\n", stu.sco.pe.overal, stu.sco.pe.real_credit); n++;finalcredit = finalcredit + stu.sco.pe.real_credit;}if (stu.sco.se.has){printf("课程编号:E    课程名称:专业    综合成绩:%-10.2f实得学分:%-10.2f\n", stu.sco.se.overal, stu.sco.se.real_credit); n++;finalcredit = finalcredit + stu.sco.se.real_credit;}if ((stu.sco.ch.has) || (stu.sco.ma.has) || (stu.sco.en.has) || (stu.sco.pe.has) || (stu.sco.se.has))printf("\n\t\t\t\t  共修:%d科   实得总学分为:%.2f\n\n", n, finalcredit);else printf("无成绩！\n\n");break;}}if (exist == 0) printf("查无此人！\n");printf("***********************************************************************************************************************\n");rewind(fp);//关键！！}}else if (num == 2)//姓名{printf("\t\t\t\t\t\t<键入'#'并回车退出>\n");int exist;char item[10] = "";while (1){exist = 0;printf("输入姓名:");scanf("%s", item);while (getchar() != '\n')continue;if (item[0] == '#')//#则退出{fcloseall();Paint_Start();return;}printf("***********************************************************************************************************************\n");while (fgetc(fp) != EOF)//遍历{fseek(fp, -1L, 1);fread(&stu, 240, 1, fp);if (strcmp(stu.basic.name, item) == 0)//找到相同项就打印出来{exist = 1;int n=0;float finalcredit=0;printf("学号:%-15s姓名:%-s\n\n", stu.basic.id, stu.basic.name);if (stu.sco.ch.has){printf("课程编号:A    课程名称:语文    综合成绩:%-10.2f实得学分:%-10.2f\n", stu.sco.ch.overal, stu.sco.ch.real_credit); n++;finalcredit = finalcredit + stu.sco.ch.real_credit;}if (stu.sco.ma.has){printf("课程编号:B    课程名称:数学    综合成绩:%-10.2f实得学分:%-10.2f\n", stu.sco.ma.overal, stu.sco.ma.real_credit); n++;finalcredit = finalcredit + stu.sco.ma.real_credit;}if (stu.sco.en.has){printf("课程编号:C    课程名称:英语    综合成绩:%-10.2f实得学分:%-10.2f\n", stu.sco.en.overal, stu.sco.en.real_credit); n++;finalcredit = finalcredit + stu.sco.en.real_credit;}if (stu.sco.pe.has){printf("课程编号:D    课程名称:体育    综合成绩:%-10.2f实得学分:%-10.2f\n", stu.sco.pe.overal, stu.sco.pe.real_credit); n++;finalcredit = finalcredit + stu.sco.pe.real_credit;}if (stu.sco.se.has){printf("课程编号:E    课程名称:专业    综合成绩:%-10.2f实得学分:%-10.2f\n", stu.sco.se.overal, stu.sco.se.real_credit); n++;finalcredit = finalcredit + stu.sco.se.real_credit;}if ((stu.sco.ch.has) || (stu.sco.ma.has) || (stu.sco.en.has) || (stu.sco.pe.has) || (stu.sco.se.has))printf("\n\t\t\t\t  共修:%d科   实得总学分为:%.2f\n\n", n, finalcredit);else printf("无成绩！\n\n");break;}}if (exist == 0) printf("查无此人！\n");printf("***********************************************************************************************************************\n");rewind(fp);//关键！！}}else{printf("二选一！\n");system("pause");fcloseall();Paint_Start();}fcloseall();
}
//数据删除
void del()//删除成绩 
{FILE* fp, * fpp;student stu;char id[30] = "";int i;printf("**********************************************输入'#'并回车可退出此功能************************************************\n");while (1){memset(id, 0, 30);fpp = fopen("stutemp.db", "wb");//临时新建的文件，用于储存删除一个人后所以人的数据，然后把他变成stu.db，把原来的stu.db删除，起到删除一个人数据而不留空的目的fcloseall();if ((fp = fopen("stu.db", "rb+")) == NULL){printf("文件打开失败！\n");system("pause");Paint_Start();return;}if ((fpp = fopen("stutemp.db", "rb+")) == NULL){printf("临时文件创建失败！\n");system("pause");return;}printf("输入目标学号:");//姓名会重，学号不会重		//先查找再删除scanf("%s", id);while (getchar() != '\n')continue;if (id[0] == '#'){break;}int done = 0;for (i = 1; fgetc(fp) != EOF; i++)//与id相同的第i个数据{fseek(fp, -1L, 1);fread(&stu, 240, 1, fp);if (strcmp(id, stu.basic.id) == 0){done = 1;break;}}rewind(fp);rewind(fpp);if (done == 1)//存在此人则输出信息{printf("\n以下为该学生成绩和基本信息：\n");printf("%-15s%-10s%-5s%-10s%-15s\n", "学号", "姓名", "性别", "宿舍号码", "电话号码");printf("%-15s%-10s%-5s%-10s%-15s\n", stu.basic.id, stu.basic.name, stu.basic.sex, stu.basic.dom, stu.basic.tel);int n = 0;float finalcredit = 0;printf("学生成绩：\n");if (stu.sco.ch.has){printf("课程编号:A    课程名称:语文    综合成绩:%-10.2f实得学分:%-10.2f\n", stu.sco.ch.overal, stu.sco.ch.real_credit); n++;finalcredit = finalcredit + stu.sco.ch.real_credit;}if (stu.sco.ma.has){printf("课程编号:B    课程名称:数学    综合成绩:%-10.2f实得学分:%-10.2f\n", stu.sco.ma.overal, stu.sco.ma.real_credit); n++;finalcredit = finalcredit + stu.sco.ma.real_credit;}if (stu.sco.en.has){printf("课程编号:C    课程名称:英语    综合成绩:%-10.2f实得学分:%-10.2f\n", stu.sco.en.overal, stu.sco.en.real_credit); n++;finalcredit = finalcredit + stu.sco.en.real_credit;}if (stu.sco.pe.has){printf("课程编号:D    课程名称:体育    综合成绩:%-10.2f实得学分:%-10.2f\n", stu.sco.pe.overal, stu.sco.pe.real_credit); n++;finalcredit = finalcredit + stu.sco.pe.real_credit;}if (stu.sco.se.has){printf("课程编号:E    课程名称:专业    综合成绩:%-10.2f实得学分:%-10.2f\n", stu.sco.se.overal, stu.sco.se.real_credit); n++;finalcredit = finalcredit + stu.sco.se.real_credit;}printf("\n\t\t\t\t   共修:%d科   实得总学分为:%.2f\n\n", n, finalcredit);printf("\n请确认是否要删除该学生全部数据?（输入:'y'删除，'n'取消）\n");printf(">>");scanf("%s", id);while (getchar() != '\n')continue;if (id[0] == 'y'){for (int j = 1; fgetc(fp) != EOF; j++)//把stu里的每一条数据，除了i标记的那条（也就是要删除的那条），都写入临时文件{fseek(fp, -1L, 1);if (j == i){fseek(fp, 240L, 1);if (fgetc(fp) == EOF)break;else fseek(fp, -1L, 1);}fread(&stu, 240, 1, fp);if (fwrite(&stu, 240, 1, fpp) != 1){printf("写入临时文件失败！\n");done = 0;}}fcloseall();system("del stu.db");//命令提示符多方便system("rename stutemp.db stu.db");//删了stu.db拿stutemp.db充当stu.dbif (done == 0)printf("删除失败！\n\n");else printf("数据已删除！\n");printf("***********************************************************************************************************************\n");}else{if (id[0] == 'n')printf("已取消！\n\n");else{printf("未知指令!\n\n");}printf("***********************************************************************************************************************\n");}}else{printf("查无此人！\n\n");printf("***********************************************************************************************************************\n");}fcloseall();}fcloseall();Paint_Start();
} 
//成绩分段
void div()//成绩分段
{system("cls");printf("******************************************************成绩分段**********************************************************\n");printf("根据平均综合成绩可将学生分为A,B,C三个档次:\n");printf("\t\t\t\t\t\t      ***A***\n\n");FILE* fp;int i, j;student stu;if ((fp = fopen("stu.db", "rb")) == NULL){printf("文件打开失败！\n");return;}printf("\t\t\t学号           姓名      语文   数学   英语   体育   专业   平均综合\n");for (;fgetc(fp)!=EOF;)//一条条判断是不是在某范围内，在，则打印{fseek(fp,-1L,1);fread(&stu,240,1,fp);stu.sco.overal_aver = (stu.sco.ch.overal + stu.sco.ma.overal + stu.sco.en.overal + stu.sco.pe.overal + stu.sco.se.overal) / 5.0;//平均综合成绩if (stu.sco.overal_aver >= 80)printf("\t\t\t%-15s%-10s%-7.1f%-7.1f%-7.1f%-7.1f%-7.1f%-10.2f\n", stu.basic.id, stu.basic.name, stu.sco.ch.overal, stu.sco.ma.overal, stu.sco.en.overal, stu.sco.pe.overal, stu.sco.se.overal, stu.sco.overal_aver);}rewind(fp);printf("\n\n\t\t\t\t\t\t       **B**\n\n");printf("\t\t\t学号           姓名      语文   数学   英语   体育   专业   平均综合\n");for (; fgetc(fp) != EOF;){fseek(fp, -1L, 1);fread(&stu, 240, 1, fp);stu.sco.overal_aver = (stu.sco.ch.overal + stu.sco.ma.overal + stu.sco.en.overal + stu.sco.pe.overal + stu.sco.se.overal) / 5.0;//平均综合成绩if (stu.sco.overal_aver < 80&&stu.sco.overal_aver>=60)printf("\t\t\t%-15s%-10s%-7.1f%-7.1f%-7.1f%-7.1f%-7.1f%-10.2f\n", stu.basic.id, stu.basic.name, stu.sco.ch.overal, stu.sco.ma.overal, stu.sco.en.overal, stu.sco.pe.overal, stu.sco.se.overal, stu.sco.overal_aver);}rewind(fp);printf("\n\n\t\t\t\t\t\t        *C*\n\n");printf("\t\t\t学号           姓名      语文   数学   英语   体育   专业   平均综合\n");for (; fgetc(fp) != EOF;){fseek(fp, -1L, 1);fread(&stu, 240, 1, fp);stu.sco.overal_aver = (stu.sco.ch.overal + stu.sco.ma.overal + stu.sco.en.overal + stu.sco.pe.overal + stu.sco.se.overal) / 5.0;//平均综合成绩if (stu.sco.overal_aver < 60)printf("\t\t\t%-15s%-10s%-7.1f%-7.1f%-7.1f%-7.1f%-7.1f%-10.2f\n", stu.basic.id, stu.basic.name, stu.sco.ch.overal, stu.sco.ma.overal, stu.sco.en.overal, stu.sco.pe.overal, stu.sco.se.overal, stu.sco.overal_aver);}fcloseall();printf("\n\t\t\t\t\t\t\t\t\t      ");system("pause");Paint_Start();return;
}
//文件输出
void outfile()//输出文件内容 
{char dir[50]="";float total;FILE* fp;student stu;system("cls");printf("*****************************************************文件输出***********************************************************\n");printf("输入文件的绝对路径(例如C:\\xxxxx.db):\n");scanf("%s", dir);while (getchar() != '\n')continue;if ((fp = fopen(dir, "rb")) == NULL){printf("文件打开失败！");system("pause");Paint_Start();return;}printf("****************************************************************************\n");printf("* 学号           姓名      性别 宿舍号 电话号    平均综合成绩 平均综合学分 *\n");for (; fgetc(fp) != EOF;){fseek(fp, -1L, SEEK_CUR);fread(&stu, 240, 1, fp);stu.sco.overal_aver = (stu.sco.ch.overal + stu.sco.ma.overal + stu.sco.en.overal + stu.sco.pe.overal + stu.sco.se.overal) / 5.0;//平均综合成绩stu.sco.credit_aver = (stu.sco.ch.real_credit + stu.sco.ma.real_credit + stu.sco.en.real_credit + stu.sco.pe.real_credit + stu.sco.se.real_credit) / 5.0;//平均综合学分printf("* %-15s%-10s%-5s%-7s%-10s%-13f%-13f*\n", stu.basic.id,stu.basic.name,stu.basic.sex,stu.basic.dom,stu.basic.tel,stu.sco.overal_aver,stu.sco.credit_aver);}printf("****************************************************************************\n");fcloseall();printf("\n\t\t\t\t\t\t              ");system("pause");Paint_Start();
}
//假的文件储存
void savefile()//文件储存
{printf("文件stu.db已储存到源程序根目录!");system("pause");Paint_Start();
}
//成绩追加
void add()//追加，在文件末尾
{system("cls");printf("*****************************************************成绩追加***********************************************************\n");printf("依次键入学号、姓名、性别、宿舍号码、电话号码，用一个空格隔开各数据，回车键确认。样例：541913460230 喵辰汐 男 113 10086\n");FILE* fp;student stu;bool err = false;char id[30], name[10], sex[5] = "", dom[5], tel[20];char  subid[5], subname[10], daily[5], credit[5], experi[5], paper[5];fp = fopen("stu.db", "rb+");if (fp == NULL){printf("文件打开失败！\n");Paint_Start();return;}memset(id, 0, 30);memset(name, 0, 10);memset(sex, 0, 5);memset(dom, 0, 5);memset(tel, 0, 20);printf("输入：");scanf("%s %s %s %s %s",id, name, sex, dom, tel);while (getchar() != '\n')continue;bool isname = true;for (int i = 0; i <= 7; i++){if (name[i] >= 32 && name[i] <= 127) isname = false;//仅判断是否是ASCII中的字符}if (name[8] == '\0' && isname == true)//一个中文字符占两个字节{strcpy(stu.basic.name, name);}else{printf("请检查姓名输入是否正确，并重新输入！\n");err = true;}if (ifnum(id) && id[11] != '\0' && id[12] == '\0') strcpy(stu.basic.id, id);else{printf("请检查学号输入是否正确，并重新输入！\n");err = true;}if (strcmp(sex, "男") == 0 || strcmp(sex, "女") == 0) strcpy(stu.basic.sex, sex);else{printf("请检查性别输入是否正确，并重新输入！\n");err = true;}if (ifnum(dom)) strcpy(stu.basic.dom, dom);else{printf("请检查宿舍号码输入是否正确，并重新输入！\n");err = true;}if (ifnum(tel)) strcpy(stu.basic.tel, tel);else{printf("请检查电话号码输入是否正确，并重新输入！\n");err = true;}if (err == false){int exist = 0;student _stu = stu;while (fgetc(fp) != EOF)//遍历{fseek(fp, -1L, 1);fread(&_stu, 240, 1, fp);if (strcmp(_stu.basic.id, id) == 0)//找到相同项{exist = 1;printf("已有此人！\n");system("pause"); fcloseall();Paint_Start();return;}}if (exist == 0)//文件指针已在末尾{printf("***********************************************************************************************************************\n");printf("依次输入课程编号(A-E)、课程名称(编号为准)、学分、平时成绩、实验成绩、卷面成绩，用一个空格隔开各数据,回车键确认(输入'#'键并回车结束输入)。\n例如：A 语文 3 66 78 82\n");printf("输入：\n");while (err == false){scanf("%s", subid);if (subid[0] == '#'){//此处绝对不能关闭文件流，下面将要写入文件break;}scanf(" %s %s %s %s %s", subname, credit, daily, experi, paper);while (getchar() != '\n')continue;if (subid[0] >= 'A' && subid[0] <= 'E' && subid[1] == '\0');else{printf("请检查课程编号输入是否正确，并重新输入！\n");err = true;}if (ifnum(credit));else{printf("请检查学分输入是否正确，并重新输入！\n");err = true;}if (ifnum(daily) && ((daily[0] == '1' && daily[1] == '0' && daily[2] == '0') || (daily[2] == '\0' && daily[3] != '\0') || daily[2] == '\0'));else{printf("请检查平时成绩输入是否正确，并重新输入！\n");err = true;}if (ifnum(experi) && ((experi[0] == '1' && experi[1] == '0' && experi[2] == '0') || (experi[2] == '\0' && experi[3] != '\0') || experi[2] == '\0'));else{printf("请检查实验成绩输入是否正确，并重新输入！\n");err = true;}if (ifnum(paper) && ((paper[0] == '1' && paper[1] == '0' && paper[2] == '0') || (paper[2] == '\0' && paper[3] != '\0') || paper[2] == '\0'));else{printf("请检查卷面成绩输入是否正确，并重新输入！\n");err = true;}switch (subid[0])//各项成绩信息计算并存入stu结构体{case 'A':{stu.sco.ch.has = true;strcpy(stu.sco.ch.credit, credit);strcpy(stu.sco.ch.daily, daily);strcpy(stu.sco.ch.experi, experi);strcpy(stu.sco.ch.paper, paper);float credittemp;if (credit[2] == '0') credittemp = 100;else if (credit[1] != '\0')credittemp = ((int)credit[0] - 48) * 10 + (int)credit[1] - 48;else credittemp = (int)credit[0] - 48;float dailytemp, papertemp, experitemp;if (daily[2] == '0') dailytemp = 100;else if (daily[1] != '\0')dailytemp = ((int)daily[0] - 48) * 10 + (int)daily[1] - 48;else dailytemp = (int)daily[0] - 48;if (paper[2] == '0') papertemp = 100;else if (paper[1] != '\0')papertemp = ((int)paper[0] - 48) * 10 + (int)paper[1] - 48;else papertemp = (int)paper[0] - 48;if (strcmp(experi, "-1") == 0){stu.sco.ch.overal = dailytemp * 0.3 + papertemp * 0.7;}else{if (experi[2] == '0') experitemp = 100;else if (experi[1] != '\0')experitemp = ((int)experi[0] - 48) * 10 + (int)experi[1] - 48;else experitemp = (int)experi[0] - 48;stu.sco.ch.overal = dailytemp * 0.15 + experitemp * 0.15 + papertemp * 0.7;}if (stu.sco.ch.overal >= 90 && stu.sco.ch.overal <= 100)stu.sco.ch.real_credit = credittemp;else if (stu.sco.ch.overal < 90 && stu.sco.ch.overal >= 80) stu.sco.ch.real_credit = credittemp * 0.8;else if (stu.sco.ch.overal < 80 && stu.sco.ch.overal >= 70) stu.sco.ch.real_credit = credittemp * 0.75;else if (stu.sco.ch.overal < 70 && stu.sco.ch.overal >= 60) stu.sco.ch.real_credit = credittemp * 0.6;else stu.sco.ch.real_credit = 0;}; break;case 'B':{stu.sco.ma.has = true;strcpy(stu.sco.ma.credit, credit);strcpy(stu.sco.ma.daily, daily);strcpy(stu.sco.ma.experi, experi);strcpy(stu.sco.ma.paper, paper);float credittemp;if (credit[2] == '0') credittemp = 100;else if (credit[1] != '\0')credittemp = ((int)credit[0] - 48) * 10 + (int)credit[1] - 48;else credittemp = (int)credit[0] - 48;float dailytemp, papertemp, experitemp;if (daily[2] == '0') dailytemp = 100;else if (daily[1] != '\0')dailytemp = ((int)daily[0] - 48) * 10 + (int)daily[1] - 48;else dailytemp = (int)daily[0] - 48;if (paper[2] == '0') papertemp = 100;else if (paper[1] != '\0')papertemp = ((int)paper[0] - 48) * 10 + (int)paper[1] - 48;else papertemp = (int)paper[0] - 48;if (strcmp(experi, "-1") == 0){stu.sco.ma.overal = dailytemp * 0.3 + papertemp * 0.7;}else{if (experi[2] == '0') experitemp = 100;else if (experi[1] != '\0')experitemp = ((int)experi[0] - 48) * 10 + (int)experi[1] - 48;else experitemp = (int)experi[0] - 48;stu.sco.ma.overal = dailytemp * 0.15 + experitemp * 0.15 + papertemp * 0.7;}if (stu.sco.ma.overal >= 90 && stu.sco.ma.overal <= 100)stu.sco.ma.real_credit = credittemp;else if (stu.sco.ma.overal < 90 && stu.sco.ma.overal >= 80) stu.sco.ma.real_credit = credittemp * 0.8;else if (stu.sco.ma.overal < 80 && stu.sco.ma.overal >= 70) stu.sco.ma.real_credit = credittemp * 0.75;else if (stu.sco.ma.overal < 70 && stu.sco.ma.overal >= 60) stu.sco.ma.real_credit = credittemp * 0.6;else stu.sco.ma.real_credit = 0;}; break;case 'C':{stu.sco.en.has = true;strcpy(stu.sco.en.credit, credit);strcpy(stu.sco.en.daily, daily);strcpy(stu.sco.en.experi, experi);strcpy(stu.sco.en.paper, paper);float credittemp;if (credit[2] == '0') credittemp = 100;else if (credit[1] != '\0')credittemp = ((int)credit[0] - 48) * 10 + (int)credit[1] - 48;else credittemp = (int)credit[0] - 48;float dailytemp, papertemp, experitemp;if (daily[2] == '0') dailytemp = 100;else if (daily[1] != '\0')dailytemp = ((int)daily[0] - 48) * 10 + (int)daily[1] - 48;else dailytemp = (int)daily[0] - 48;if (paper[2] == '0') papertemp = 100;else if (paper[1] != '\0')papertemp = ((int)paper[0] - 48) * 10 + (int)paper[1] - 48;else papertemp = (int)paper[0] - 48;if (strcmp(experi, "-1") == 0){stu.sco.en.overal = dailytemp * 0.3 + papertemp * 0.7;}else{if (experi[2] == '0') experitemp = 100;else if (experi[1] != '\0')experitemp = ((int)experi[0] - 48) * 10 + (int)experi[1] - 48;else experitemp = (int)experi[0] - 48;stu.sco.en.overal = dailytemp * 0.15 + experitemp * 0.15 + papertemp * 0.7;}if (stu.sco.en.overal >= 90 && stu.sco.en.overal <= 100)stu.sco.en.real_credit = credittemp;else if (stu.sco.en.overal < 90 && stu.sco.en.overal >= 80) stu.sco.en.real_credit = credittemp * 0.8;else if (stu.sco.en.overal < 80 && stu.sco.en.overal >= 70) stu.sco.en.real_credit = credittemp * 0.75;else if (stu.sco.en.overal < 70 && stu.sco.en.overal >= 60) stu.sco.en.real_credit = credittemp * 0.6;else stu.sco.en.real_credit = 0;}; break;case 'D':{stu.sco.pe.has = true;strcpy(stu.sco.pe.credit, credit);strcpy(stu.sco.pe.daily, daily);strcpy(stu.sco.pe.experi, experi);strcpy(stu.sco.pe.paper, paper);float credittemp;if (credit[2] == '0') credittemp = 100;else if (credit[1] != '\0')credittemp = ((int)credit[0] - 48) * 10 + (int)credit[1] - 48;else credittemp = (int)credit[0] - 48;float dailytemp, papertemp, experitemp;if (daily[2] == '0') dailytemp = 100;else if (daily[1] != '\0')dailytemp = ((int)daily[0] - 48) * 10 + (int)daily[1] - 48;else dailytemp = (int)daily[0] - 48;if (paper[2] == '0') papertemp = 100;else if (paper[1] != '\0')papertemp = ((int)paper[0] - 48) * 10 + (int)paper[1] - 48;else papertemp = (int)paper[0] - 48;if (strcmp(experi, "-1") == 0){stu.sco.pe.overal = dailytemp * 0.3 + papertemp * 0.7;}else{if (experi[2] == '0') experitemp = 100;else if (experi[1] != '\0')experitemp = ((int)experi[0] - 48) * 10 + (int)experi[1] - 48;else experitemp = (int)experi[0] - 48;stu.sco.pe.overal = dailytemp * 0.15 + experitemp * 0.15 + papertemp * 0.7;}if (stu.sco.pe.overal >= 90 && stu.sco.pe.overal <= 100)stu.sco.pe.real_credit = credittemp;else if (stu.sco.pe.overal < 90 && stu.sco.pe.overal >= 80) stu.sco.pe.real_credit = credittemp * 0.8;else if (stu.sco.pe.overal < 80 && stu.sco.pe.overal >= 70) stu.sco.pe.real_credit = credittemp * 0.75;else if (stu.sco.pe.overal < 70 && stu.sco.pe.overal >= 60) stu.sco.pe.real_credit = credittemp * 0.6;else stu.sco.pe.real_credit = 0;}; break;case 'E':{stu.sco.se.has = true;strcpy(stu.sco.se.credit, credit);strcpy(stu.sco.se.daily, daily);strcpy(stu.sco.se.experi, experi);strcpy(stu.sco.se.paper, paper);float credittemp;if (credit[2] == '0') credittemp = 100;else if (credit[1] != '\0')credittemp = ((int)credit[0] - 48) * 10 + (int)credit[1] - 48;else credittemp = (int)credit[0] - 48;float dailytemp, papertemp, experitemp;if (daily[2] == '0') dailytemp = 100;else if (daily[1] != '\0')dailytemp = ((int)daily[0] - 48) * 10 + (int)daily[1] - 48;else dailytemp = (int)daily[0] - 48;if (paper[2] == '0') papertemp = 100;else if (paper[1] != '\0')papertemp = ((int)paper[0] - 48) * 10 + (int)paper[1] - 48;else papertemp = (int)paper[0] - 48;if (strcmp(experi, "-1") == 0){stu.sco.se.overal = dailytemp * 0.3 + papertemp * 0.7;}else{if (experi[2] == '0') experitemp = 100;else if (experi[1] != '\0')experitemp = ((int)experi[0] - 48) * 10 + (int)experi[1] - 48;else experitemp = (int)experi[0] - 48;stu.sco.se.overal = dailytemp * 0.15 + experitemp * 0.15 + papertemp * 0.7;}if (stu.sco.se.overal >= 90 && stu.sco.se.overal <= 100)stu.sco.se.real_credit = credittemp;else if (stu.sco.se.overal < 90 && stu.sco.se.overal >= 80) stu.sco.se.real_credit = credittemp * 0.8;else if (stu.sco.se.overal < 80 && stu.sco.se.overal >= 70) stu.sco.se.real_credit = credittemp * 0.75;else if (stu.sco.se.overal < 70 && stu.sco.se.overal >= 60) stu.sco.se.real_credit = credittemp * 0.6;else stu.sco.se.real_credit = 0;}//已经全部存入stu}}fwrite(&stu, 240, 1, fp);fcloseall();printf("***********************************************************************************************************************\n");printf("以下是新增学生基本信息：\n");printf("%-15s%-10s%-5s%-10s%-15s\n", "学号", "姓名", "性别", "宿舍号码", "电话号码");printf("%-15s%-10s%-5s%-10s%-15s\n", stu.basic.id, stu.basic.name, stu.basic.sex, stu.basic.dom, stu.basic.tel);printf("\n以下是新增学生成绩：\n");int n = 0;float finalcredit = 0;printf("\n学号:%-15s姓名:%-s\n\n", stu.basic.id, stu.basic.name);if (stu.sco.ch.has){printf("课程编号:A    课程名称:语文    综合成绩:%-10.2f实得学分:%-10.2f\n", stu.sco.ch.overal, stu.sco.ch.real_credit); n++;finalcredit = finalcredit + stu.sco.ch.real_credit;}if (stu.sco.ma.has){printf("课程编号:B    课程名称:数学    综合成绩:%-10.2f实得学分:%-10.2f\n", stu.sco.ma.overal, stu.sco.ma.real_credit); n++;finalcredit = finalcredit + stu.sco.ma.real_credit;}if (stu.sco.en.has){printf("课程编号:C    课程名称:英语    综合成绩:%-10.2f实得学分:%-10.2f\n", stu.sco.en.overal, stu.sco.en.real_credit); n++;finalcredit = finalcredit + stu.sco.en.real_credit;}if (stu.sco.pe.has){printf("课程编号:D    课程名称:体育    综合成绩:%-10.2f实得学分:%-10.2f\n", stu.sco.pe.overal, stu.sco.pe.real_credit); n++;finalcredit = finalcredit + stu.sco.pe.real_credit;}if (stu.sco.se.has){printf("课程编号:E    课程名称:专业    综合成绩:%-10.2f实得学分:%-10.2f\n", stu.sco.se.overal, stu.sco.se.real_credit); n++;finalcredit = finalcredit + stu.sco.se.real_credit;}printf("\n\t\t\t\t   共修:%d科   实得总学分为:%.2f\n\n", n, finalcredit);system("pause");Paint_Start();}}if (fp != NULL)fcloseall();system("pause");Paint_Start();
}
//成绩修改
void edit()//先查找，再编辑
{student stu;int exist;bool err;char id[30], subid[5], subname[10], daily[5], credit[5], experi[5], paper[5];char item[30] = "";FILE* fp;printf("\t\t\t\t\t\t<键入'#'并回车退出>\n");fp = fopen("stu.db", "rb+");if (fp == NULL){printf("数据库打开失败！\n");system("pause");Paint_Start();return;}while (1){exist = 0;printf("学号:");scanf("%s", item);while (getchar() != '\n')continue;if (item[0] == '#')break;printf("***********************************************************************************************************************\n");while (fgetc(fp) != EOF)//先查人{fseek(fp, -1L, 1);fread(&stu, 240, 1, fp);//先读取，再一个个比较，直到读到底都没有一样的就直接结束了，或者读到一样的就输出到屏幕，然后开始读取学生信息和成绩，输入成绩，仅（替换）录入成绩if (strcmp(stu.basic.id, item) == 0){exist = 1;int n = 0;float finalcredit = 0;printf("学号:%-15s姓名:%-s\n\n", stu.basic.id, stu.basic.name);if (stu.sco.ch.has){printf("课程编号:A    课程名称:语文    综合成绩:%-10.2f实得学分:%-10.2f\n", stu.sco.ch.overal, stu.sco.ch.real_credit); n++;finalcredit = finalcredit + stu.sco.ch.real_credit;}if (stu.sco.ma.has){printf("课程编号:B    课程名称:数学    综合成绩:%-10.2f实得学分:%-10.2f\n", stu.sco.ma.overal, stu.sco.ma.real_credit); n++;finalcredit = finalcredit + stu.sco.ma.real_credit;}if (stu.sco.en.has){printf("课程编号:C    课程名称:英语    综合成绩:%-10.2f实得学分:%-10.2f\n", stu.sco.en.overal, stu.sco.en.real_credit); n++;finalcredit = finalcredit + stu.sco.en.real_credit;}if (stu.sco.pe.has){printf("课程编号:D    课程名称:体育    综合成绩:%-10.2f实得学分:%-10.2f\n", stu.sco.pe.overal, stu.sco.pe.real_credit); n++;finalcredit = finalcredit + stu.sco.pe.real_credit;}if (stu.sco.se.has){printf("课程编号:E    课程名称:专业    综合成绩:%-10.2f实得学分:%-10.2f\n", stu.sco.se.overal, stu.sco.se.real_credit); n++;finalcredit = finalcredit + stu.sco.se.real_credit;}printf("\n\t\t\t\t   共修:%d科   实得总学分为:%.2f\n\n", n, finalcredit);printf("***********************************************************************************************************************\n");break;}}if (exist == 0){printf("查无此人！\n");}else//人存在，成绩也存在{err = false;//是否有错误memset(id, 0, 30);//清空各数组所占内存的内容，都变成空，方便后续判断memset(subid, 0, 5);memset(subname, 0, 10);memset(credit, 0, 5);memset(daily, 0, 5);memset(experi, 0, 5);memset(paper, 0, 5);//这样以后，所有元素都变成\0了printf("依次输入课程编号(A-E)、课程名称(以编号为准)、学分、平时成绩、实验成绩、卷面成绩，用一个空格隔开各数据,每一条输入完成后按回车键进行下一条输入。例如:A 语文 3 66 78 82\n输入:");scanf("%s %s %s %s %s %s", subid, subname, credit, daily, experi, paper);while (getchar() != '\n')continue;if (subid[0] >= 'A' && subid[0] <= 'E' && subid[1] == '\0');else{printf("请检查课程编号输入是否正确，并重新输入！\n");err = true;}if (ifnum(credit));else{printf("请检查学分输入是否正确，并重新输入！\n");err = true;}if (ifnum(daily) && ((daily[0] == '1' && daily[1] == '0' && daily[2] == '0') || (daily[2] == '\0' && daily[3] != '\0') || daily[2] == '\0'));else{printf("请检查平时成绩输入是否正确，并重新输入！\n");err = true;}if (ifnum(experi) && ((experi[0] == '1' && experi[1] == '0' && experi[2] == '0') || (experi[2] == '\0' && experi[3] != '\0') || experi[2] == '\0'));else{printf("请检查实验成绩输入是否正确，并重新输入！\n");err = true;}if (ifnum(paper) && ((paper[0] == '1' && paper[1] == '0' && paper[2] == '0') || (paper[2] == '\0' && paper[3] != '\0') || paper[2] == '\0'));else{printf("请检查卷面成绩输入是否正确，并重新输入！\n");err = true;}if (err == false){strcpy(stu.basic.id,item);switch (subid[0]){case 'A':{stu.sco.ch.has = true;strcpy(stu.sco.ch.credit, credit);strcpy(stu.sco.ch.daily, daily);strcpy(stu.sco.ch.experi, experi);strcpy(stu.sco.ch.paper, paper);float credittemp;if (credit[2] == '0') credittemp = 100;else if (credit[1] != '\0')credittemp = ((int)credit[0] - 48) * 10 + (int)credit[1] - 48;else credittemp = (int)credit[0] - 48;float dailytemp, papertemp, experitemp;if (daily[2] == '0') dailytemp = 100;else if (daily[1] != '\0')dailytemp = ((int)daily[0] - 48) * 10 + (int)daily[1] - 48;else dailytemp = (int)daily[0] - 48;if (paper[2] == '0') papertemp = 100;else if (paper[1] != '\0')papertemp = ((int)paper[0] - 48) * 10 + (int)paper[1] - 48;else papertemp = (int)paper[0] - 48;if (strcmp(experi, "-1") == 0){stu.sco.ch.overal = dailytemp * 0.3 + papertemp * 0.7;}else{if (experi[2] == '0') experitemp = 100;else if (experi[1] != '\0')experitemp = ((int)experi[0] - 48) * 10 + (int)experi[1] - 48;else experitemp = (int)experi[0] - 48;stu.sco.ch.overal = dailytemp * 0.15 + experitemp * 0.15 + papertemp * 0.7;}if (stu.sco.ch.overal >= 90 && stu.sco.ch.overal <= 100)stu.sco.ch.real_credit = credittemp;else if (stu.sco.ch.overal < 90 && stu.sco.ch.overal >= 80) stu.sco.ch.real_credit = credittemp * 0.8;else if (stu.sco.ch.overal < 80 && stu.sco.ch.overal >= 70) stu.sco.ch.real_credit = credittemp * 0.75;else if (stu.sco.ch.overal < 70 && stu.sco.ch.overal >= 60) stu.sco.ch.real_credit = credittemp * 0.6;else stu.sco.ch.real_credit = 0;}; break;case 'B':{stu.sco.ma.has = true;strcpy(stu.sco.ma.credit, credit);strcpy(stu.sco.ma.daily, daily);strcpy(stu.sco.ma.experi, experi);strcpy(stu.sco.ma.paper, paper);float credittemp;if (credit[2] == '0') credittemp = 100;else if (credit[1] != '\0')credittemp = ((int)credit[0] - 48) * 10 + (int)credit[1] - 48;else credittemp = (int)credit[0] - 48;float dailytemp, papertemp, experitemp;if (daily[2] == '0') dailytemp = 100;else if (daily[1] != '\0')dailytemp = ((int)daily[0] - 48) * 10 + (int)daily[1] - 48;else dailytemp = (int)daily[0] - 48;if (paper[2] == '0') papertemp = 100;else if (paper[1] != '\0')papertemp = ((int)paper[0] - 48) * 10 + (int)paper[1] - 48;else papertemp = (int)paper[0] - 48;if (strcmp(experi, "-1") == 0){stu.sco.ma.overal = dailytemp * 0.3 + papertemp * 0.7;}else{if (experi[2] == '0') experitemp = 100;else if (experi[1] != '\0')experitemp = ((int)experi[0] - 48) * 10 + (int)experi[1] - 48;else experitemp = (int)experi[0] - 48;stu.sco.ma.overal = dailytemp * 0.15 + experitemp * 0.15 + papertemp * 0.7;}if (stu.sco.ma.overal >= 90 && stu.sco.ma.overal <= 100)stu.sco.ma.real_credit = credittemp;else if (stu.sco.ma.overal < 90 && stu.sco.ma.overal >= 80) stu.sco.ma.real_credit = credittemp * 0.8;else if (stu.sco.ma.overal < 80 && stu.sco.ma.overal >= 70) stu.sco.ma.real_credit = credittemp * 0.75;else if (stu.sco.ma.overal < 70 && stu.sco.ma.overal >= 60) stu.sco.ma.real_credit = credittemp * 0.6;else stu.sco.ma.real_credit = 0;}; break;case 'C':{stu.sco.en.has = true;strcpy(stu.sco.en.credit, credit);strcpy(stu.sco.en.daily, daily);strcpy(stu.sco.en.experi, experi);strcpy(stu.sco.en.paper, paper);float credittemp;if (credit[2] == '0') credittemp = 100;else if (credit[1] != '\0')credittemp = ((int)credit[0] - 48) * 10 + (int)credit[1] - 48;else credittemp = (int)credit[0] - 48;float dailytemp, papertemp, experitemp;if (daily[2] == '0') dailytemp = 100;else if (daily[1] != '\0')dailytemp = ((int)daily[0] - 48) * 10 + (int)daily[1] - 48;else dailytemp = (int)daily[0] - 48;if (paper[2] == '0') papertemp = 100;else if (paper[1] != '\0')papertemp = ((int)paper[0] - 48) * 10 + (int)paper[1] - 48;else papertemp = (int)paper[0] - 48;if (strcmp(experi, "-1") == 0){stu.sco.en.overal = dailytemp * 0.3 + papertemp * 0.7;}else{if (experi[2] == '0') experitemp = 100;else if (experi[1] != '\0')experitemp = ((int)experi[0] - 48) * 10 + (int)experi[1] - 48;else experitemp = (int)experi[0] - 48;stu.sco.en.overal = dailytemp * 0.15 + experitemp * 0.15 + papertemp * 0.7;}if (stu.sco.en.overal >= 90 && stu.sco.en.overal <= 100)stu.sco.en.real_credit = credittemp;else if (stu.sco.en.overal < 90 && stu.sco.en.overal >= 80) stu.sco.en.real_credit = credittemp * 0.8;else if (stu.sco.en.overal < 80 && stu.sco.en.overal >= 70) stu.sco.en.real_credit = credittemp * 0.75;else if (stu.sco.en.overal < 70 && stu.sco.en.overal >= 60) stu.sco.en.real_credit = credittemp * 0.6;else stu.sco.en.real_credit = 0;}; break;case 'D':{stu.sco.pe.has = true;strcpy(stu.sco.pe.credit, credit);strcpy(stu.sco.pe.daily, daily);strcpy(stu.sco.pe.experi, experi);strcpy(stu.sco.pe.paper, paper);float credittemp;if (credit[2] == '0') credittemp = 100;else if (credit[1] != '\0')credittemp = ((int)credit[0] - 48) * 10 + (int)credit[1] - 48;else credittemp = (int)credit[0] - 48;float dailytemp, papertemp, experitemp;if (daily[2] == '0') dailytemp = 100;else if (daily[1] != '\0')dailytemp = ((int)daily[0] - 48) * 10 + (int)daily[1] - 48;else dailytemp = (int)daily[0] - 48;if (paper[2] == '0') papertemp = 100;else if (paper[1] != '\0')papertemp = ((int)paper[0] - 48) * 10 + (int)paper[1] - 48;else papertemp = (int)paper[0] - 48;if (strcmp(experi, "-1") == 0){stu.sco.pe.overal = dailytemp * 0.3 + papertemp * 0.7;}else{if (experi[2] == '0') experitemp = 100;else if (experi[1] != '\0')experitemp = ((int)experi[0] - 48) * 10 + (int)experi[1] - 48;else experitemp = (int)experi[0] - 48;stu.sco.pe.overal = dailytemp * 0.15 + experitemp * 0.15 + papertemp * 0.7;}if (stu.sco.pe.overal >= 90 && stu.sco.pe.overal <= 100)stu.sco.pe.real_credit = credittemp;else if (stu.sco.pe.overal < 90 && stu.sco.pe.overal >= 80) stu.sco.pe.real_credit = credittemp * 0.8;else if (stu.sco.pe.overal < 80 && stu.sco.pe.overal >= 70) stu.sco.pe.real_credit = credittemp * 0.75;else if (stu.sco.pe.overal < 70 && stu.sco.pe.overal >= 60) stu.sco.pe.real_credit = credittemp * 0.6;else stu.sco.pe.real_credit = 0;}; break;case 'E':{stu.sco.se.has = true;strcpy(stu.sco.se.credit, credit);strcpy(stu.sco.se.daily, daily);strcpy(stu.sco.se.experi, experi);strcpy(stu.sco.se.paper, paper);float credittemp;if (credit[2] == '0') credittemp = 100;else if (credit[1] != '\0')credittemp = ((int)credit[0] - 48) * 10 + (int)credit[1] - 48;else credittemp = (int)credit[0] - 48;float dailytemp, papertemp, experitemp;if (daily[2] == '0') dailytemp = 100;else if (daily[1] != '\0')dailytemp = ((int)daily[0] - 48) * 10 + (int)daily[1] - 48;else dailytemp = (int)daily[0] - 48;if (paper[2] == '0') papertemp = 100;else if (paper[1] != '\0')papertemp = ((int)paper[0] - 48) * 10 + (int)paper[1] - 48;else papertemp = (int)paper[0] - 48;if (strcmp(experi, "-1") == 0){stu.sco.se.overal = dailytemp * 0.3 + papertemp * 0.7;}else{if (experi[2] == '0') experitemp = 100;else if (experi[1] != '\0')experitemp = ((int)experi[0] - 48) * 10 + (int)experi[1] - 48;else experitemp = (int)experi[0] - 48;stu.sco.se.overal = dailytemp * 0.15 + experitemp * 0.15 + papertemp * 0.7;}if (stu.sco.se.overal >= 90 && stu.sco.se.overal <= 100)stu.sco.se.real_credit = credittemp;else if (stu.sco.se.overal < 90 && stu.sco.se.overal >= 80) stu.sco.se.real_credit = credittemp * 0.8;else if (stu.sco.se.overal < 80 && stu.sco.se.overal >= 70) stu.sco.se.real_credit = credittemp * 0.75;else if (stu.sco.se.overal < 70 && stu.sco.se.overal >= 60) stu.sco.se.real_credit = credittemp * 0.6;else stu.sco.se.real_credit = 0;}//已经全部存入stu}fseek(fp, -240L, 1);fwrite(&stu, 240, 1, fp);float finalcredit = 0;int n = 0;printf("修改如下：");printf("\n学号:%-15s姓名:%-s\n\n", stu.basic.id, stu.basic.name);if (stu.sco.ch.has){printf("课程编号:A    课程名称:语文    综合成绩:%-10.2f实得学分:%-10.2f\n", stu.sco.ch.overal, stu.sco.ch.real_credit); n++;finalcredit = finalcredit + stu.sco.ch.real_credit;}if (stu.sco.ma.has){printf("课程编号:B    课程名称:数学    综合成绩:%-10.2f实得学分:%-10.2f\n", stu.sco.ma.overal, stu.sco.ma.real_credit); n++;finalcredit = finalcredit + stu.sco.ma.real_credit;}if (stu.sco.en.has){printf("课程编号:C    课程名称:英语    综合成绩:%-10.2f实得学分:%-10.2f\n", stu.sco.en.overal, stu.sco.en.real_credit); n++;finalcredit = finalcredit + stu.sco.en.real_credit;}if (stu.sco.pe.has){printf("课程编号:D    课程名称:体育    综合成绩:%-10.2f实得学分:%-10.2f\n", stu.sco.pe.overal, stu.sco.pe.real_credit); n++;finalcredit = finalcredit + stu.sco.pe.real_credit;}if (stu.sco.se.has){printf("课程编号:E    课程名称:专业    综合成绩:%-10.2f实得学分:%-10.2f\n", stu.sco.se.overal, stu.sco.se.real_credit); n++;finalcredit = finalcredit + stu.sco.se.real_credit;}printf("\n\t\t\t\t   共修:%d科   实得总学分为:%.2f\n\n", n, finalcredit);printf("***********************************************************************************************************************\n");}}rewind(fp);}fcloseall();Paint_Start();
}
//判断是否为数字
int ifnum(char item[])//数字字符串判断，正确返回1，否则0
{bool isnum = true;for (int i = 0; item[i] != '\0'; i++){if (!(item[i] >= '0' && item[i] <= '9')){isnum = false;return 0;break;}}if(isnum) return 1;
}
//结束动画
void end()
{system("cls");printf("\n\n\n\t\t\t\t\t                 *\n");printf("\t\t\t\t\t            *  ***  ****\n");printf("\t\t\t\t\t          *** **** ****\n");printf("\t\t\t\t\t         **** **** **** ****\n");printf("\t\t\t\t\t         **** **** **** ****\n");printf("\t\t\t\t\t         **** **** **** ****\n");printf("\t\t\t\t\t         **** **** **** ****\n");printf("\t\t\t\t\t         **** **** **** ****\n");printf("\t\t\t\t\t          **** ******* ****\n");printf("\t\t\t\t\t            *************\n");printf("\t\t\t\t\t                *****\n\n");Sleep(800);system("cls");printf("\n\n\n\t\t\t\t\t                 *\n");printf("\t\t\t\t\t               ***  ****\n");printf("\t\t\t\t\t            * **** ****\n");printf("\t\t\t\t\t          *** **** **** \n");printf("\t\t\t\t\t         **** **** **** ****\n");printf("\t\t\t\t\t         **** **** **** ****\n");printf("\t\t\t\t\t         **** **** **** ****\n");printf("\t\t\t\t\t         **** **** **** ****\n");printf("\t\t\t\t\t         ****  *******  ****   \n");printf("\t\t\t\t\t          ****         ****\n");printf("\t\t\t\t\t            *************\n");printf("\t\t\t\t\t                *****\n\n");Sleep(100);system("cls");printf("\n\n\n\t\t\t\t\t                 *\n");printf("\t\t\t\t\t               ***  ****\n");printf("\t\t\t\t\t              **** ****\n");printf("\t\t\t\t\t            * **** **** \n");printf("\t\t\t\t\t          *** **** **** \n");printf("\t\t\t\t\t         **** **** **** ****\n");printf("\t\t\t\t\t         **** **** **** ****\n");printf("\t\t\t\t\t         **** **** **** ****\n");printf("\t\t\t\t\t         ****  *******  ****   \n");printf("\t\t\t\t\t         ****  感   谢  ****   \n");printf("\t\t\t\t\t          ****         ****\n");printf("\t\t\t\t\t            *************\n");printf("\t\t\t\t\t                *****\n\n");Sleep(100);system("cls");printf("\n\n\n\t\t\t\t\t                 *\n");printf("\t\t\t\t\t               ***  ****\n");printf("\t\t\t\t\t              **** ****\n");printf("\t\t\t\t\t              **** **** \n");printf("\t\t\t\t\t            * **** ****\n");printf("\t\t\t\t\t          *** **** **** \n");printf("\t\t\t\t\t         **** **** **** ****\n");printf("\t\t\t\t\t         **** **** **** ****\n");printf("\t\t\t\t\t         ****  *******  ****   \n");printf("\t\t\t\t\t         ****           ****   \n");printf("\t\t\t\t\t         ****  感   谢  ****   \n");printf("\t\t\t\t\t          ****         ****\n");printf("\t\t\t\t\t            *************\n");printf("\t\t\t\t\t                *****\n\n");Sleep(100);system("cls");printf("\n\n\n\t\t\t\t\t                 *\n");printf("\t\t\t\t\t               ***  ****\n");printf("\t\t\t\t\t              **** ****\n");printf("\t\t\t\t\t              **** **** \n");printf("\t\t\t\t\t            * **** ****\n");printf("\t\t\t\t\t          *** **** **** \n");printf("\t\t\t\t\t         **** **** **** ****\n");printf("\t\t\t\t\t         **** **** **** ****\n");printf("\t\t\t\t\t         ****  *******  ****   \n");printf("\t\t\t\t\t         ****  感   谢  ****   \n");printf("\t\t\t\t\t         ****           ****   \n");printf("\t\t\t\t\t          **** 使   用 ****\n");printf("\t\t\t\t\t            *************\n");printf("\t\t\t\t\t                *****\n\n");Sleep(2000);
}

总结

1.编写过程中遇到很多问题，比如fclose关闭文件流，至今未搞明白，只有一个fp文件指针变量的信息查询，无论在哪调用fclose，无论调用多少次fclose，都无法关闭文件流，导致文件被进程占用，无法进行删除和替换，最终用fcloseall解决了，很奇怪。
2.冗余代码要删除，它们很容易干扰你的的思路。
3.输入时，缓冲区问题要注意。
4.仍然是case后忘加break问题，需要细心。
5.坐的时间长一定要出去走走，头脑清醒了思路来得更快，效率更高。