#define true 1
#define false 0
#include <stdio.h>
#include <stdlib.h>typedef struct book //图书的信息
{int key;//编号char bookname[20];//书名char authorname[20];//作者char publishinghouse[20];//出版社double price;//价格int quantity;//存余数量struct book * Next;
}BookNodeList;BookNodeList *array_information[10]={0};//保存找到的指针//查找
BookNodeList *makelist(void);//建立图书信息链表
void findwithname(char name[20],BookNodeList *L);//通过图书名字查找
int IsEmpty(BookNodeList* L);
BookNodeList *findwithkey(int key,BookNodeList *L);//通过图书编号查找
void findwithauthor(char authorname[20],BookNodeList *L);//通过图书作者查找
void findwithpublishname(char publishinghouse[20],BookNodeList *L);//通过出版社查找
void AddItem(BookNodeList * L);//添加项目
void deletebook(int key,BookNodeList *L);//删除图书
void modify(int key,BookNodeList *L);//修改信息
void initialize_record(BookNodeList *L);//从文件中提取信息初始化链表
void save(BookNodeList *L);//将链表的数据存储int main(void)
{BookNodeList* X;//创建一个图书信息链表BookNodeList* L;L=makelist();//L是链表的头指针initialize_record(L);//deletebook(2,L);//添加数据AddItem(L);//AddItem(L);AddItem(L);//char bookname[20]="a";//char authorname[20]="xie";//char publishname[20]="xie";//findwithauthor(authorname,L);//findwithpublishname(publishname,L);//findwithname(bookname,L);return 0;
}//创建图书链表
BookNodeList* makelist(void)
{BookNodeList *P;P=malloc(sizeof(BookNodeList));P->Next=NULL;printf("------------------------图书链表创建成功-------------------------\n\n");return P;}
//判断链表是否为空
int IsEmpty(BookNodeList* L)
{return L->Next==NULL;
}
//通过图书名查找图书
void findwithname(char name[20],BookNodeList *L)
{BookNodeList *P;P=L->Next;while(P!=NULL&&strcmp(P->bookname,name))P=P->Next;if(P==NULL){printf("没有找到目标图书");return ;}printf("%d %f %d %s %s %s\n\n",P->key,P->price,P->quantity,P->bookname,P->authorname,P->publishinghouse);}
//通过图书编号查找图书
BookNodeList *findwithkey(int key,BookNodeList *L)
{BookNodeList *P;P=L->Next;while(P!=NULL&&key!=P->key)P=P->Next;if(NULL==P){printf("没有找到图书");}return P;
}
//通过图书作者查找图书
void findwithauthor(char authorname[20],BookNodeList *L)
{int i;int j=0;BookNodeList *P;P=L->Next;while(P!=NULL){if(!strcmp(authorname,P->authorname))array_information[j++]=P;P=P->Next;}for(i=0;i<j;i++)//J的值比数量多一{printf("%d %f %d %s %s %s\n\n",array_information[i]->key,array_information[i]->price,array_information[i]->quantity,array_information[i]->bookname,array_information[i]->authorname,array_information[i]->publishinghouse);}
}
//通过出版社名称查找图书
void findwithpublishname(char publishinghouse[20],BookNodeList *L)//将找到的信息放入指针中
{int i;int j=0;BookNodeList *P;P=L->Next;while(P!=NULL){if(!strcmp(publishinghouse,P->publishinghouse))array_information[j++]=P;P=P->Next;}for(i=0;i<j;i++)//J的值比数量多一{printf("%d %f %d %s %s %s\n",array_information[i]->key,array_information[i]->price,array_information[i]->quantity,array_information[i]->bookname,array_information[i]->authorname,array_information[i]->publishinghouse);}}
//添加图书项目
void AddItem(BookNodeList * L)
{BookNodeList * P=NULL;P=(BookNodeList *)malloc(sizeof(BookNodeList));if(P==NULL){printf("can't malloc");exit(0);}P->Next=NULL;printf("请输入图书编号");scanf("%d",&P->key);getchar();printf("请输入价格");scanf("%lf",&P->price);getchar();printf("请输入存余数量");scanf("%d",&P->quantity);getchar();printf("请输入图书名称");gets(P->bookname);printf("请输入作者名称");gets(P->authorname);printf("请输入出版社名称");gets(P->publishinghouse);while(L->Next!=NULL){L=L->Next;}L->Next=P;FILE *fp;if((fp=fopen("图书数据.txt","a"))==NULL)//对文件是否成功打开的测试{printf("can't open a test!\n");printf("程序即将关闭\n");exit(2);}else{printf("---------------------------文件打开成功------------------------------\n");}/*此处将数据添加进文件当中*/fprintf(fp,"%d %f %d %s %s %s\n",P->key,P->price,P->quantity,P->bookname,P->authorname,P->publishinghouse);printf("-------------------------添加成功！------------------------\n");if(fclose(fp)==EOF){printf("文件没有成功关闭！");exit(5);}}
//根据图书编号删除图书
void deletebook(int key,BookNodeList *L)
{if(NULL==findwithkey(1,L)){return;}FILE *fp;if((fp=fopen("test.txt","w+"))==NULL)//对文件是否成功打开的测试{printf("can't open a test!\n");printf("程序即将关闭\n");exit(2);}BookNodeList * pr=L;BookNodeList * P=pr->Next;while(P->key!=key){pr=P;P=P->Next;}pr->Next=P->Next;P->Next=NULL;free(P);printf("---------------------------该图书信息删除成功----------------------------\n");save(L);if(fclose(fp)==EOF){printf("文件没有成功关闭！");exit(5);}}
//修改图书信息
void modify(int key,BookNodeList *L)
{BookNodeList *P;P=L->Next;while(P!=NULL&&P->key!=key)P=P->Next;printf("请输入修改后的图书名称");gets(P->bookname);printf("请输入修改后的作者名称");gets(P->authorname);printf("请输入修改后出版社名称");gets(P->publishinghouse);printf("请输入修改后的价格");scanf("%d",&P->price);getchar();printf("请输入修改后存余数量");scanf("%d",&P->quantity);getchar();printf("-----------------------------图书信息修改成功------------------------\n");save(L);}
//读取文件信息，初始化图书链表
void initialize_record(BookNodeList *L)
{BookNodeList bookinformation;//打开文件FILE *fp;if((fp=fopen("图书数据.txt","r"))==NULL)//对文件是否成功打开的测试{printf("can't open a test!\n");printf("程序即将关闭\n");exit(2);}else{printf("---------------------------文件打开成功------------------------------\n");}while((fscanf(fp,"%d %lf %d %s %s %s\n",&bookinformation.key,&bookinformation.price,&bookinformation.quantity,bookinformation.bookname,bookinformation.authorname,bookinformation.publishinghouse))!=EOF){//给BookNodeList* P;P=malloc(sizeof(BookNodeList));P->Next=NULL;strcpy(P->bookname,bookinformation.bookname);P->key=bookinformation.key;strcpy(P->authorname,bookinformation.authorname);strcpy(P->publishinghouse,bookinformation.publishinghouse);P->price=bookinformation.price;P->quantity=bookinformation.quantity;L->Next=P;L=P;}if(fclose(fp)==EOF){printf("文件没有成功关闭！");exit(5);}}
//保存当前的图书链表到文件当中
void save(BookNodeList *L)
{FILE *fp;if((fp=(fopen("图书数据.txt","w")))==NULL){printf("不能创建文档！，程序即将结束,请输入任意字符结束程序");getchar();exit(4);}else{printf("文档创建成功，请按任意键开始存储！");getchar();}while(L->Next!=NULL){fprintf(fp,"%d %f %d %s %s %s\n",L->Next->key,L->Next->price,L->Next->quantity,L->Next->bookname,L->Next->authorname,L->Next->publishinghouse);L=L->Next;}printf("图书数据存储成功。！");//关闭文件if(fclose(fp)==EOF){printf("文件没有成功关闭！");exit(5);}}