#include<stdio.h>
#include<windows.h>
#include<string.h>
#include<io.h>
#define FILE_PATH "G:\\book\\allBooks.txt"
#define FILG_PATH "G:\\book\\index.txt"
struct Book
{int ID; //图书id char name[100];//图书名 double price; //价格char author[100];//作者int num;	//总数量int ifBorrowed;//是否借阅，0为没有，1为被借阅过int currentNum;//剩余图书的数量	
};
//图书数组全局
struct Book books[1000];
//图书ID
int bookID; 
//添加图书下标
int index;
//---------------------------管理员功能函数-------------------------------------------------
//增加图书
void addBook()
{//-------数据持久化操作 //如果文件不存在直接将全局数组写入文件中
/*	if(!access(FILE_PATH,F_OK))//F_OK :文件存在 R_OK: 写入权限  {FILE *p=fopen(FILE_PATH,"w");fwrite(books,sizeof(struct Book),index,p);fclose(p);FILE *m=fopen(FILG_PATH,"w");fprintf(m,"%d",index);fclose(m);} else	//如果文件存在了将读出所有数据赋值给全局变量 {*///读取 FILE *p=fopen(FILG_PATH,"r");fscanf(p,"%d",&index);bookID=index;fclose(p);FILE *m=fopen(FILE_PATH,"r");fread(books,sizeof(struct Book),1000,m);fclose(m);bookID=index;printf("请输入图书名字：");scanf("%s",books[index].name);printf("请输入图书的价格:");scanf("%lf",&(books[index].price));printf("请输入作者:");scanf("%s",books[index].author);printf("请输入图书的数量:");scanf("%d",&(books[index].num));books[index].ifBorrowed=0;books[index].currentNum=books[index].num;books[index].ID=++bookID;index++;//写入 ========================================== FILE *n=fopen(FILE_PATH,"w");FILE *q=fopen(FILG_PATH,"w");fwrite(books,sizeof(struct Book),index,n);fprintf(q,"%d",index);fclose(n);fclose(q);//=================================================	
//	}
}
//删除图书 
void deleteBook(int delID)
{//文件不存在直接退出 
//	if(!access(FILE_PATH,F_OK))
//	{
//		printf("文件不存在!");
//		return;
//	}FILE *p=fopen(FILG_PATH,"r");fscanf(p,"%d",&index);bookID=index;fclose(p);FILE *m=fopen(FILE_PATH,"r");fread(books,sizeof(struct Book),1000,m);fclose(m);int delIndex=delID-1;if(bookID==0){printf("图书库为空！\n");}else if(delIndex>=index){printf("不存在此图书!");}//删除顺序表中最后一本图书 else if(index-1==delIndex){bookID --;index --;printf("删除成功!");}else{int i;for(i=delIndex;i<index-1;i++){	books[i]=books[i+1];books[i].ID -= 1;}index --;bookID --;printf("删除成功!");}//写入 FILE *n=fopen(FILE_PATH,"w");FILE *q=fopen(FILG_PATH,"w");fwrite(books,sizeof(struct Book),index,n);fprintf(q,"%d",index);fclose(n);fclose(q);
}
//查看所有图书
void  showALLBooks()
{
//	if(!access(FILE_PATH,F_OK))
//	{
//		printf("文件不存在！");
//		return;
//	}//读取 FILE *p=fopen(FILG_PATH,"r");fscanf(p,"%d",&index);bookID=index;fclose(p);FILE *m=fopen(FILE_PATH,"r");fread(books,sizeof(struct Book),1000,m);fclose(m);printf("|\t编号\t名称\t作者\t数量\t价格\t借阅\t余量|\n");int i;for(i=0;i<index;i++){printf("\t%d\t%s\t%s\t%d\t￥%g\t",books[i].ID,books[i].name,books[i].author,books[i].num,books[i].price);printf("%s\t",books[i].ifBorrowed==1 ?"是":"否");printf("%d\n",books[i].currentNum);}
}
//查看所有借阅图书
void showALLBorrowedBooks()
{
//=====================================================	
/*	if(!access(FILE_PATH,F_OK)){printf("文件不存在！");return;}
*/	//读取 FILE *p=fopen(FILG_PATH,"r");fscanf(p,"%d",&index);bookID=index;fclose(p);FILE *m=fopen(FILE_PATH,"r");fread(books,sizeof(struct Book),1000,m);fclose(m);//==========================================================int i;printf("----------------------借出图书预览--------------------------\n");printf("\t编号\t名称\t作者\t数量\t价格\t借阅\t余量\n");for(i=0;i<index;i++){if(books[i].ifBorrowed==1){printf("|\t%d\t%s\t%s\t%d\t￥%g\t",books[i].ID,books[i].name,books[i].author,books[i].num,books[i].price);printf("%s\t",books[i].ifBorrowed==1 ?"是":"否");printf("%d|\n",books[i].currentNum);	}}printf("------------------------------------------------------------\n");	
}//---------------------------------------------------------------------------------
//------------------------------------用户功能函数-------------------------------
void showAllBooks_User()
{//=====================================================	
//	if(!access(FILE_PATH,F_OK))
//	{
//		printf("文件不存在！");
//		return;
//	}//读取 FILE *p=fopen(FILG_PATH,"r");fscanf(p,"%d",&index);bookID=index;fclose(p);FILE *m=fopen(FILE_PATH,"r");fread(books,sizeof(struct Book),1000,m);fclose(m);//==========================================================printf("|\t编号\t名称\t作者\t数量\t可借阅\t余量|\n");int i;for(i=0;i<index;i++){printf("\t%d\t%s\t%s\t%d\t",books[i].ID,books[i].name,books[i].author,books[i].num);printf("%s\t",books[i].currentNum!=0 ?"是":"否");printf("%d\n",books[i].currentNum);}
}
void borrowBook()//借书 
{//=====================================================	//读取 FILE *p=fopen(FILG_PATH,"r");fscanf(p,"%d",&index);bookID=index;fclose(p);FILE *m=fopen(FILE_PATH,"r");fread(books,sizeof(struct Book),1000,m);fclose(m);//==========================================================printf("请输入所借图书ID：");int borrowID;scanf("%d",&borrowID);printf("请输入借阅的数量:");int borrowNum;scanf("%d",&borrowNum);if(borrowID>index||borrowID<=0){printf("选择错误");}else{if(borrowNum>books[borrowID-1].currentNum){printf("图书余量不够!\n");}else{books[borrowID-1].currentNum-=borrowNum;books[borrowID-1].ifBorrowed=1;printf("借阅成功！\n");}}//写入 ========================================== FILE *n=fopen(FILE_PATH,"w");//	FILE *q=fopen(FILG_PATH,"w");fwrite(books,sizeof(struct Book),index,n);//	fprintf(q,"%d",index);fclose(n);//	fclose(m);//=================================================	
}
void returnBook()
{//=====================================================	//读取 FILE *p=fopen(FILG_PATH,"r");fscanf(p,"%d",&index);bookID=index;fclose(p);FILE *m=fopen(FILE_PATH,"r");fread(books,sizeof(struct Book),1000,m);fclose(m);//==========================================================printf("请输入要还书的ID:");int returnID;int returnNum;scanf("%d",&returnID);printf("\n请输入还书的数量:");scanf("%d",&returnNum);if(returnID<=0||returnID>index) {printf("不存在这本书\n");}else{//如果还书的数量大于借出的总量，错误 if(returnNum>(books[returnID-1].num-books[returnID-1].currentNum)){printf("还书错误\n"); }else if(returnNum==(books[returnID-1].num-books[returnID-1].currentNum)){//如果全部还完  是否借阅设为  否 books[returnID-1].currentNum+=returnNum;books[returnID-1].ifBorrowed=0;printf("还书成功\n"); Sleep(3000);}else{// books[returnID-1].currentNum+=returnNum;printf("还书成功\n"); Sleep(3000);}}//写入 FILE *n=fopen(FILE_PATH,"w");FILE *q=fopen(FILG_PATH,"w");fwrite(books,sizeof(struct Book),index,n);fprintf(q,"%d",index);fclose(n);fclose(q);
}//--------------------------------------------------------------------------------
//主页面 
int  indexViewShow()
{system("cls");printf("-----------欢迎使用图书管理系统-----------------\n"); printf("|                                               |\n"); printf("|               管理员请选 1                    |\n");printf("|                用户请选 2                     |\n");printf("|                 退出请选 3                    |\n");printf("------------------------------------------------\n");int chioce;printf("请选择: ");scanf("%d",&chioce);return chioce;
}
//管理员
int managerViewShow()
{system("cls");printf("----------------管理员---------------------------\n"); printf("|                                               |\n"); printf("|              增加图书请选1                    |\n");printf("|              删除图书请选2                    |\n");printf("|              查看图书请选3                    |\n");printf("|              查看借阅图书 4                   |\n"); printf("|              返回上级页面请按5                |\n");printf("------------------------------------------------\n");int chioce;printf("请选择: ");scanf("%d",&chioce);return chioce;} 
//用户页面
int userViewShow()
{system("cls");printf("----------------用--户---------------------------\n"); printf("|                                               |\n"); printf("|              查看图书请选1                    |\n");printf("|              借阅图书请选2                    |\n");printf("|              归还图书请选3                    |\n");printf("|              返回上级页面请按4                |\n");printf("-------------------------------------------------\n");int chioce;printf("请选择: ");scanf("%d",&chioce);return chioce;} 
int main()
{	int chose;do{chose=indexViewShow();switch(chose){case 1://管理员 {int manageChose;do{manageChose=managerViewShow();switch(manageChose){case 1:	//增加图书{char chioce[20];do{addBook();printf("\n继续添加请按： y，否则请选： n：");scanf("%s",chioce); }while(strcmp(chioce,"y")==0);}	break;case 2://删除图书{showALLBooks();printf("输入要删除图书的ID,退出请选esc");int deleteID;scanf("%d",&deleteID);printf("确认删除编号为%d的书请按 :y\t",deleteID);char chose[2];scanf("%s",chose);if((strcmp(chose,"y")==0)||(strcmp(chose,"Y")==0)){deleteBook(deleteID);Sleep(2000);}} break;case 3://查看图书{char chioce[20];showALLBooks();printf("退出请选y: ");do{									scanf("%s",chioce); }while(strcmp(chioce,"y")!=0);//	Sleep(5000);}	break;case 4://查看所有借阅图书 {char chioce[20];showALLBorrowedBooks();printf("退出请选y: ");do{									scanf("%s",chioce); }while(strcmp(chioce,"y")!=0);} break;case 5: break;default:printf("输入有误,请重新选择");Sleep(2000);}}while(manageChose!=5);}break;case 2://{int userChose;//用户 do{userChose=userViewShow();switch(userChose){case 1://查看图书 {char chioce[20];showAllBooks_User();printf("退出请选y: ");do{									scanf("%s",chioce); }while(strcmp(chioce,"y")!=0);} 	break;case 2://借阅 {showAllBooks_User();char chioce[20];do{borrowBook();printf("继续借阅请选y，退出请选n");scanf("%s",chioce);								}while(strcmp(chioce,"y")==0);}	break;case 3:{returnBook();}	break;//归还 case 4:	break;//返回上级 default:printf("输入有误,请重新选择");Sleep(2000);break;	 }}while(userChose!=4);}break;case 3://{break;}default: printf("输入有误，请重新选择\n");Sleep(1000);break;}}while(chose!=3);printf("谢谢使用图书管理系统\n5秒后将自动退出\n");Sleep(5000);return 0;
}