图书借阅管理系统

1、系统概述

图书借阅管理系统由管理员系统和用户系统两个子系统构成。用户运行程序后可按程序说明进入子系统，输入“1”进入管理员系统，输入“2”进入用户系统。图书信息和读者信息均用文件存储。

管理员系统：

新增图书：管理员可输入图书的类别、书号、书名、借出状态等信息。
更改图书信息：管理员输入要更改图书的书号后，即可对图书的各类信息进行修改。
删除图书：管理员输入要删除图书的书号，删除图书的各类信息。
查找图书：管理员可以选择书名查找、类别查找、书号查找3种方式查找目标图书。
显示所有图书信息：此功能可查看文件中的所有图书，包括新增、更改的图书。
全删当前数据：对当前执行新增、更改操作产生的数据进行删除。
退出：退出系统。

用户系统：

借阅图书：用户输入想要借阅图书的书号借阅。
归还图书：归还已借图书。
查找所有图书：查看文件中包含的图书信息。
查找图书：用户可以选择书名查找、类别查找、书号查找3种方式查找目标图书。
显示我的信息：显示用户已借阅图书的书号和剩余图书借阅数量。
退出：退出系统。

2、系统功能实现效果（部分）

#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include<conio.h>//控制输入输出 
struct book
{char sort[20],num[20],bookname[20];int lend;int nolend;struct book *next;
};
struct reader{
char xuehao[20],name[20];
int lended;
int maxlended;
char item[5][20];
struct reader *next;
};
void bookcharge();//图书管理系统函数 
void readcharge();//用户管理系统函数
void readbook(struct book *head);//从图书信息文件中获取信息
void readreader(struct reader *head);//从用户信息文件中获取信息 
//------------------------管理员系统 ----------------------- //int menu1();//图书管理系统菜单
int menu1();//管理员菜单 
void add(struct book *head);//新增图书 
void change(struct book *head);//更改图书信息
void shanchu(struct book *head); //删除图书
void find(struct book *head); //查找图书
void show(struct book *head); //显示所有图书信息
void deleteall(struct book *head);//全删当前数据
void free(struct book *head);//退出
//------------------------用户系统---------------------------// 
struct reader *insert(struct reader *head);//返回登录读者信息指针 
int menu2();//用户菜单 
void lendbook(struct book *head,struct reader *q);//借阅图书
void returnbook(struct book *head,struct reader *q);//归还图书
void output(struct reader *head);//显示我的信息 
void freeall(struct book *head,struct reader *q);//退出
//-------------------------主函数----------------------------//main(){int x;printf("欢迎进入图书馆系统，按1进入管理员系统，按2进入用户系统");scanf("%d",&x);if(x==1)bookcharge();if(x==2)readcharge();}//---------------------管理员系统--------------------------//
void bookcharge()
{int x;struct book *headbook;headbook=(struct book *)malloc(sizeof(struct book));headbook->next=NULL;readbook(headbook);while(1){getch;system("cls");//清屏switch(x=menu1()){case 1:add(headbook);break;case 2:change(headbook);break;case 3:shanchu(headbook);break;case 4:find(headbook);break;case 5:show(headbook);break;case 6:deleteall(headbook);break;case 0:free(headbook);break;}} 
}//--------------------用户系统---------------------------//
void readcharge()
{int x;struct book *headbook;headbook=(struct book *)malloc(sizeof(struct book));headbook->next=NULL;struct reader *headreader,*p;headreader=(struct reader *)malloc(sizeof (struct reader));headreader->next=NULL; readbook(headbook);readreader(headreader);p=insert(headreader);while(1){getch();system("cls");switch(x=menu2()){case 1:lendbook(headbook,p); break;case 2:returnbook(headbook,p);break;case 3:show(headbook);break;case 4:find(headbook);break;case 5:output(p);break;case 0:free(headbook);break;}}
}void readbook(struct book *head)
{FILE *fp;if((fp=fopen("book.txt","r+"))==NULL){printf("文件读取失败\n");exit(0);}struct book *p,*tail=head;while(!feof(fp)){p=(struct book *)malloc(sizeof(struct book));fscanf(fp,"%s %s %s %d %d",p->sort,p->num,p->bookname,&p->lend,&p->nolend);p->next=NULL;tail->next=p;tail=p;}fclose(fp);
}void readreader(struct reader *head)
{FILE *fp;if((fp=fopen("reader.txt","r+"))==NULL){printf("文件读取失败\n");exit(0);}	struct reader *p,*tail=head;int i;while(!feof(fp)){p=(struct reader*)malloc(sizeof(struct reader));fscanf(fp,"%s %s %d",p->xuehao,p->name,&p->lended);for(i=0;i<p->lended;i++)fscanf(fp,"%s",p->item[i]);fscanf(fp,"%d",&p->maxlended);p->next=NULL;tail->next=p;tail=p;}fclose(fp);
}int menu1()
{int a;printf("===============图书维护系统===========\n");printf("1.新增图书\n");printf("2.更改图书信息\n");printf("3.删除图书\n");printf("4.查找图书\n");printf("5.显示所有图书信息\n");printf("6.全删当前数据\n");printf("0.退出\n");printf("===============请选择=================\n");scanf("%d",&a);return a;
}
//----------------------新增函数---------------------------------------// 
void add(struct book *head)
{FILE *fp;char ch;fp=fopen("boos.txt","ra+");struct book *p=head->next,*s;s=(struct book *)malloc(sizeof(struct book));while(p->next!=NULL)p=p->next;s->next=p->next;p->next=s;printf("新增图书信息，请输入：\n");printf("%-10s%-10s%-10s%-10s%-10s\n","图书类别","书号","书名","已借出数量 ","未借出数量");scanf("%s %s %s %d %d",s->sort,s->num,s->bookname,&s->lend,&s->nolend);fprintf(fp,"%s %s %s %d %d",s->sort,s->num,s->bookname,s->lend,s->nolend);fputc(ch,fp);fclose(fp);printf("===============添加成功===============\n"); getch();   
}
//----------------------更改函数---------------------------------------// 
void change(struct book *head)
{char str[20];struct book *p=head->next,*p1;printf("输入你要修改的书号:\n");scanf("%s",str);printf("%10s%10s%10s\t%10s\t%10s\n","图书类别","书号","书名","已借出数量","未借出数量");while(p){if(strcmp(str,p->num)==0){printf("%10s %10s %10s %10d %10d\n",p->sort,p->num,p->bookname,p->lend,p->nolend);p1=p;}p=p->next; } printf("输入更改后的信息\n");printf("%10s%10s%10s\t%10s\t%10s\n","图书类别","书号","书名","已借出数量","未借出数量");scanf("%s %s %s %d %d",p1->sort,p1->num,p1->bookname,&p1->lend,&p1->nolend);printf("===============修改完毕================\n");getch();
}
// ----------------------删除函数-------------------------------------//
void shanchu(struct book *head)
{char a[20];struct book *p=head->next,*p1=head;printf("输入你要删除的书号:\n");scanf("%s",a);printf("%-10s%-10s%-10s%-10s%-10s\n","图书类别","书号","书名","已借出数量 ","未借出数量");while(p){    if(strcmp(p->num,a)==0){printf("%-10s%-10s%-10s%-10d%-10d\n",p->sort,p->num,p->bookname,p->lend,p->nolend);p1->next=p->next; free(p);}p1=p;p=p->next;	 }printf("============删除完毕===========\n"); getch();
} 
//----------------------查找函数-----------------------------------------//
void find(struct book *head)
{int a,flag=0;char b[20];struct book *p=head->next;printf("选择查找方式:书名查找按1，类别查找按2，书号查找按3:\n");scanf("%d",&a);if(a==1){printf("请输入你要查找的书名:\n");scanf("%s",b);while(p){if(strcmp(p->bookname,b)==0){printf("%-10s%-10s%-10s%-10s%-10s\n","图书类别","书号","书名","已借出数量 ","未借出数量");printf("%-10s%-10s%-10s%-10d%-10d\n",p->sort,p->num,p->bookname,p->lend,p->nolend);getch();flag=1;}p=p->next;}if(flag==0)printf("查无此书\n");printf("请按任意键继续…"); getch();}else if(a==2){printf("请输入你要查找的类别:\n");scanf("%s",b);while(p){if(strcmp(p->sort,b)==0){printf("%-10s%-10s%-10s%-10s%-10s\n","图书类别","书号","书名","已借出数量","未借出数量");printf("%-10s%-10s%-10s%-10d%-10d\n",p->sort,p->num,p->bookname,p->lend,p->nolend);printf("请按任意键继续…"); getch();flag=1;}p=p->next; }if(flag==0)printf("查无此类\n");printf("请按任意键继续…"); getch();}else if(a==3){printf("请输入你要查找的书号:\n");scanf("%s",b);while(p){if(strcmp(p->num,b)==0){printf("%-10s%-10s%-10s%-10s%-10s\n","图书类别","书号","书名","已借出数量 ","未借出数量");printf("%-10s%-10s%-10s%-10d%-10d\n",p->sort,p->num,p->bookname,p->lend,p->nolend);printf("请按任意键继续…"); getch();flag=1;}p=p->next; }if(flag==0)printf("查无此书\n");}elseprintf("输入错误\n");
}
//-----------------------显示所有图书信息-------------------------------//
void show(struct book *head)
{struct book *p=head->next;printf("%-10s%-10s%-10s%-10s%-10s\n","图书类别","书号","书名","已借出数量 ","未借出数量");while(p){printf("%-10s%-10s%-10s%10d%10d\n",p->sort,p->num,p->bookname,p->lend,p->nolend);p=p->next;   }getch();
} 
//-----------------------全删当前函数----------------------------------// 
void deleteall(struct book *head)
{struct book *p=head;while(p){head=head->next;free(p);p=head;}printf("=========已经全删==========\n");  getch();
}
//-----------------------退出-----------------------------------------//void free(struct book *head){struct book *p=head;while(p){head=head->next;free(p);p=head;}printf("正在退出，按任意键继续\n"); getch();}struct reader *insert(struct reader *head)
{char str[20];int flag=0;//判断学号是否存在的标记 struct reader *p=head->next;printf("用户请输入学号登录(104173101):");scanf("%s",str);while(p){if(strcmp(p->xuehao,str)==0){flag=1;break;}p=p->next;}	if(flag==1)return p;elseprintf("学号输入错误");
}
int menu2()
{int b;printf("============图书维护系统==============\n");printf("1.借阅图书\n");printf("2.归还图书\n");printf("3.查看所有图书\n");printf("4.查找图书\n");printf("5.显示我的信息\n");printf("0.退出\n");printf("============请选择====================\n");scanf("%d",&b);return b;
}
//-----------------------借阅图书----------------------------------// 
void lendbook(struct book *head,struct reader *q)
{char s[20];int flag=0;struct book *p=head->next;printf("============书籍借阅系统============\n"); printf("请输入你想要借阅的书号：");scanf("%s",s);while(p){if(strcmp(p->num,s)==0){flag=1;break;} p=p->next; } if(q->lended>q->maxlended){printf("已达最大借书数量!\n");printf("====================================\n");return ;}if(flag==1){strcpy(q->item[q->lended],s);q->lended++;p->lend++;p->nolend--;printf("借阅成功！\n");}elseprintf("查无此书!\n");printf("====================================\n");getch();
}
//--------------------------------归还图书----------------------------// 
void returnbook(struct book *head,struct reader *q)
{char s[20];int flag=0,i,t;struct book *p=head->next;printf("============书籍归还系统============\n"); printf("请输入你想要归还的书号：");scanf("%s",s);for(i=0;i<q->lended;i++)if(strcmp(q->item[i],s)==0){flag=1;t=i;break;} 			if(flag==1){memset(q->item[t],0,30);q->lended--;while(p){if(strcmp(p->num,s)==0){p->lend--;p->nolend++;}p=p->next;}printf("归还成功！\n");}elseprintf("书号输入错误!\n");printf("====================================\n");
}
//-------------------------显示我的信息----------------------// 
void output(struct reader *head)
{   int i;printf("%-10s%-10s%-10s%-10s\n","学号","姓名","已借出数量 ","最大借出数量");printf("%-10s%-10s%-10d%-10d\n",head->xuehao,head->name,head->lended,head->maxlended);printf("借书项目\n");for(i=0;i<head->lended;i++)printf("%10s",head->item[i]);
}