模拟图书管理系统（简单c语言DOS界面）

[code=plain]#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;
}