C语言图书管理系统文件数据库

简介

c语言的一个大作业，发上来纪念下嘿嘿。写的不是很好，很多东西都揉在一起来，不过注释写的也挺多，希望能帮到有需要的朋友。

题目要求

简单文件数据库-模拟图书馆管理系统
涉及知识点：文件读写、内存管理、结构体定义、基本数据结构、高级格式化输入输出
要求：
编写一个程序模拟图书管理系统。用户分为管理员和读者两类，分别显示不同文本格式菜单，通过菜单项对应数字进行选择。读者菜单包括借书、还书、查询等功能。管理员菜单包括图书和读者信息录入、修改和删除。图书信息至少应包括：编号、书名、数量，读者信息至少应包括：编号、姓名、所借图书。可根据图书名称或编号进行图书信息查询，可查询某本书现在被哪些读者借走。
命令行参数如下：
Libsim –a(-u) xxxx
第一个参数为可执行程序名称；第二个参数为用户身份，-a表示管理员，-u表示读者；第三个参数为用户名

实现的功能

1．管理员：

对图书进行管理：添加图书，修改图书名称、数量，删除图书。
对读者进行管理：添加读者，修改读者名称，删除读者.
一键查看全部书籍信息（序号，书名，剩余数量）
一键查看全部读者信息（序号，读者名，所借阅书籍）
单本图书详情查询：可根据序号和书名查找，向管理员展示图书序号、名称、剩余数量和借阅了此书的读者。

2．读者：

借阅图书（只能同时借阅一本书）
还回图书
一键查看全部书籍信息（序号，书名，剩余数量）

readme

需要从cmd命令行运行程序，如图（注意格式）

管理员名：Zhang
进入管理员菜单格式：可执行程序名 -a Zhang (只设置了一个管理员，没有添加管理员的功能）
进入读者菜单格式：可执行程序名 -u 读者名（需要先通过管理员添加读者）

默认生成的文件放在d盘根目录下（有时中间的过渡文件可能会没有被删除）

Book.txt ：存放书籍信息
Users.txt ：存放读者信息

代码

#include<stdio.h>
#include <io.h>int bookNumber = 1;  //全局变量 表示图书的序号
int usersNumber = 1;  //表示读者编号
char enter;  //接收换行符//添加图书的函数
void addBook(FILE *Book)
{FILE *Book1;  //当文件和书本都存在时需要新建文件来更改信息int judgeName = 0;  //判断此书是否已经被存放int num = 1, readNum, readNumber;  //书本的数量  存放读到的书本数量  读到的书本序号char name[20] = {0}, readName[20] = {0};  //存放图书名字  暂时存放读到的字符串名printf("请输入要添加的图书名：");for(int i = 0; i<20; i++)  //从输入流取得需要添加的书本名字{if(i==0)scanf("%c%c", &enter,&name[i]);elsescanf("%c",&name[i]);if(name[i]==10)  //将最后的换行符改为空{name[i]=0;break;}}  if(access("d:/Book.txt",F_OK)==0)  //access函数判断文件是否存在，存在返回值为0 使用的头文件为io{judgeName = 1;FILE *judge = fopen("d:/Book.txt", "r");  //读取数据文件，查找是否已经存在此书while(!feof(judge)){fscanf(judge, "%d %s %d", &readNumber, readName, &readNum); //由于readName已经表示地址，不需要取地址符fscanf(judge,"\n");  //读入换行符，准备下一行的读取if(strcmp(name, readName)==0)  //发现已经存在此书后跳出循环{judgeName = 2;  //为2时表示已经存在此书，需要新建一个文件来更改信息break;}}fclose(judge);  //关闭用于判断而打开的文件bookNumber = readNumber+1;if(judgeName==1)Book = fopen("d:/Book.txt", "a");  //文件存在 且不存在相同书名时向后追加内容else if(judgeName==2){Book1 = fopen("d:/Book1.txt", "w");  //新建一个文件暂存Book中的信息，最后再返回源文件中Book = fopen("d:/Book.txt","r");  //只读打开原本的文件}}elseBook = fopen("d:/Book.txt","w");  //文件不存在时新建一个文件if (judgeName<2){  fprintf(Book, "%d %s %d\n", bookNumber, name, num);  //写入序号 书名 数量和换行符bookNumber++; fclose(Book);}else{while(!feof(Book)){fscanf(Book, "%d %s %d\n", &readNumber, readName, &readNum);if(strcmp(name, readName)==0)fprintf(Book1, "%d %s %d\n", readNumber, readName, readNum+1);  //写入序号 书名 数量+1和换行符elsefprintf(Book1, "%d %s %d\n", readNumber, readName, readNum);  //写入序号 书名 数量和换行符            }bookNumber++;fclose(Book);  //关闭文件fclose(Book1);Book1 = fopen("d:/Book1.txt", "r");Book = fopen("d:/Book.txt", "w+");   //刷新原文件，再次写入正确数据while(!feof(Book1)){fscanf(Book1, "%d %s %d\n", &readNumber, readName, &readNum);fprintf(Book, "%d %s %d\n", readNumber, readName, readNum);}fclose(Book);fclose(Book1);remove("d:/Book1.txt");  //删除原文件              //rename("d:/Book1.txt", "d:/Book.txt");  //将更改后的文件改名为原数据文件}printf("添加成功！\n");
}//修改图书信息函数
void changeBook(FILE *Book)
{while(1){char name[20] = {0}, readName[20] = {0};printf("           Edit Book Information            \n");printf("[------------------------------------------]\n");printf("\t请选择需要修改的信息：\n  1.修改图书名称\n  2.修改图书数量\n  3.返回主菜单\n");printf("[------------------------------------------]\n");int function, readNumber, readNum, find = 0;  //功能选择 读取到的序号 读取到的数量 是否找到此书//判断修改后的书名是否和原有的重复Book = fopen("d:/Book.txt","r");  //只读打开原文件int ifNumber, ifNum;char ifName[20] = {0};FILE *ifUserExisted = fopen("d:/Users1.txt","w");while(!feof(Book)){fscanf(Book, "%d %s %d\n", &ifNumber, ifName, &ifNum);fprintf(ifUserExisted, "%d %s %d\n", &ifNumber, ifName, ifNum);  }fclose(ifUserExisted);fclose(Book);scanf("%d",&function);if(function == 3){remove("d:/Book1.txt");  //有时会多余创造了文件，需要删除 return;}Book = fopen("d:/Book.txt","r");  //只读打开原文件FILE *Book1 = fopen("d:/Book1.txt", "w");  //先新建一个文件存储更改后的信息printf("请输入需要更改的图书名：");for(int i = 0; i<20; i++)  //从输入流取得需要添加的书本名字{if(i==0)scanf("%c%c", &enter,&name[i]);elsescanf("%c",&name[i]);if(name[i]==10)  //将最后的换行符改为空{name[i]=0;break;}}if(function==1){while(!feof(Book)){fscanf(Book, "%d %s %d\n", &readNumber, readName, &readNum);if(strcmp(name, readName)==0){  find = 1;  //找到了此书printf("您要将书名%s更改为：", name);char changeName[20] = {0};for(int i = 0; i<20; i++)  //从输入流取得需要更改的书本名字{if(i==0)scanf("%c",&changeName[i]);elsescanf("%c",&changeName[i]);if(changeName[i]==10)  //将最后的换行符改为空{changeName[i]=0;break;}}ifUserExisted = fopen("d:/Users1.txt","r");   //判断更改后的名字是否会和已存在的书名冲突while(!feof(ifUserExisted)){fscanf(ifUserExisted, "%d %s %d\n", &ifNumber, ifName, &ifNum);if (strcmp(changeName, ifName)==0){printf("更改失败：已存在名称为%s的图书\n", changeName);fclose(ifUserExisted);fclose(Book);  //关闭文件fclose(Book1);return;}}fprintf(Book1, "%d %s %d\n", readNumber, changeName, readNum);  //写入序号 更改后的书名 数量和换行符}elsefprintf(Book1, "%d %s %d\n", readNumber, readName, readNum);  //写入序号 书名 数量和换行符            }if(find==0)  //若没找到此书{printf("没有找到此书！请重新输入\n");break;}fclose(Book);  //关闭文件fclose(Book1);Book1 = fopen("d:/Book1.txt", "r");Book = fopen("d:/Book.txt", "w+");   //刷新原文件，再次写入正确数据while(!feof(Book1)){fscanf(Book1, "%d %s %d\n", &readNumber, readName, &readNum);fprintf(Book, "%d %s %d\n", readNumber, readName, readNum);}fclose(Book);fclose(Book1);remove("d:/Book1.txt");  //删除原文件              //rename("d:/Book1.txt", "d:/Book.txt");  //将更改后的文件改名为原数据文件  此方法成功率低！！！printf("更改成功!\n");}else if(function == 2){while(!feof(Book)){fscanf(Book, "%d %s %d\n", &readNumber, readName, &readNum);if(strcmp(name, readName)==0){  find = 1;  //找到了此书printf("您要将数量%d更改为：", readNum);int newNum = 0;scanf("%d",&newNum);fprintf(Book1, "%d %s %d\n", readNumber, readName, newNum);  //写入序号 书名 更改后的数量和换行符}elsefprintf(Book1, "%d %s %d\n", readNumber, readName, readNum);  //写入序号 书名 数量和换行符            }if(find==0)  //若没找到此书{printf("没有找到此书！请重新输入");break;}fclose(Book);  //关闭文件fclose(Book1);Book1 = fopen("d:/Book1.txt", "r");Book = fopen("d:/Book.txt", "w+");   //刷新原文件，再次写入正确数据while(!feof(Book1)){fscanf(Book1, "%d %s %d\n", &readNumber, readName, &readNum);fprintf(Book, "%d %s %d\n", readNumber, readName, readNum);}fclose(Book);fclose(Book1);remove("d:/Book1.txt");  //删除原文件              //rename("d:/Book1.txt", "d:/Book.txt");  //将更改后的文件改名为原数据文件  此方法易出现问题！！！printf("更改成功!\n");}else{printf("输入格式有误，请重新输入！");break;}}
}//删除书籍的函数
void delBook(FILE *Book)
{while(1){printf("请输入您想删除的图书名：(输入\"-r\"返回上一级)");char delName[20] = {0};for(int i = 0; i<20; i++)  //从输入流取得需要删除的书本名字{//if(i==0)//  scanf("%c%c", &enter,&delName[i]);//elsescanf("%c",&delName[i]);if(delName[i]==10)  //将最后的换行符改为空{delName[i]=0;break;}}if(strcmp(delName, "-r")==0)  //输入返回上一级的指示后返回return;int readNumber, readNum, find = 0;char readName[20] = {0};Book = fopen("d:/Book.txt","r");FILE *Book1 = fopen("d:/Book1.txt","w");while (!feof(Book)){fscanf(Book, "%d %s %d\n", &readNumber, readName, &readNum);if(strcmp(delName, readName)==0){  find = 1;  //找到了此书//因为要删除此条信息，所以不再向新文件中输出它}else{if(find==1)fprintf(Book1, "%d %s %d\n", readNumber-1, readName, readNum);  //排在删除后的写入-1的序号 书名 数量和换行符            elsefprintf(Book1, "%d %s %d\n", readNumber, readName, readNum);  //删除前的写入的序号 书名 数量和换行符            }            }if(find==0)  //若没找到此书{printf("没有找到此书！请重新输入\n");continue;}fclose(Book);fclose(Book1);Book1 = fopen("d:/Book1.txt", "r");Book = fopen("d:/Book.txt", "w+");   //刷新原文件，再次写入正确数据while(!feof(Book1)){fscanf(Book1, "%d %s %d\n", &readNumber, readName, &readNum);fprintf(Book, "%d %s %d\n", readNumber, readName, readNum);}fclose(Book);fclose(Book1);remove("d:/Book1.txt");  //删除原文件              printf("删除成功!\n");}
}//展示全部图书的函数
void showBook(FILE *Book)
{printf("                  Library                   \n");printf("[------------------------------------------]\n");printf("\t序号\t书名\t\t数量\n");char readName[20] = {0};int readNumber, readNum;Book = fopen("d:/Book.txt", "r");while(!feof(Book)){fscanf(Book, "%d %s %d\n", &readNumber, readName, &readNum);printf("\t%d\t%s\t\t%d\n",readNumber, readName, readNum);           }fclose(Book);printf("[------------------------------------------]\n");
}//向管理员展示全部用户的函数
void showUsers(FILE *Users)
{printf("                   Users                    \n");printf("[------------------------------------------]\n");printf("\t序号\t姓名\t所借阅图书\n");char readName[20] = {0}, borrowBook[20] = {0};int readNumber;Users = fopen("d:/Users.txt", "r");while(!feof(Users)){fscanf(Users, "%d %s %s\n", &readNumber, readName, borrowBook);printf("\t%d\t%s\t%s\n",readNumber, readName, borrowBook);           }fclose(Users);printf("[------------------------------------------]\n");
}//添加用户函数
void addUsers(FILE *Users)
{FILE *Users1;  //当文件和用户都存在时需要新建文件来更改信息int judgeName = 0;  //判断此用户是否已经存在int num = 1, readNumber;  //  存放读到的书本数量  读到的用户序号char name[20] = {0}, readName[20] = {0}, borrowBook[20] = {"None"},readBorrowBook[20] = {"None"};  //存放用户名字  暂时存放读到的字符串名printf("请输入要添加的用户名：");for(int i = 0; i<20; i++)  //从输入流取得需要添加的用户名{if(i==0)scanf("%c%c", &enter,&name[i]);elsescanf("%c",&name[i]);if(name[i]==10)  //将最后的换行符改为空{name[i]=0;break;}}  if(access("d:/Users.txt",F_OK)==0)  //access函数判断文件是否存在，存在返回值为0 使用的头文件为io{ judgeName = 1;FILE *judge = fopen("d:/Users.txt", "r");  //读取数据文件，查找是否已经存在此用户while(!feof(judge)){fscanf(judge, "%d %s %s", &readNumber, readName, readBorrowBook); //由于readName已经表示地址，不需要取地址符fscanf(judge,"\n");  //读入换行符，准备下一行的读取if(strcmp(name, readName)==0)  //发现已经存在此用户后跳出循环{printf("已经存在此用户，无法添加。");  //已经存在此用户，返回return;}}fclose(judge);  //关闭用于判断而打开的文件usersNumber = readNumber+1;if(judgeName==1)Users = fopen("d:/Users.txt", "a");  //文件存在 且不存在相同用户时向后追加内容}elseUsers = fopen("d:/Users.txt","w");  //文件不存在时新建一个文件fprintf(Users, "%d %s %s\n", usersNumber, name, borrowBook);  //写入序号 用户名 所借书和换行符usersNumber++; fclose(Users);printf("添加成功！\n");
}//修改读者信息函数
void changeUsers(FILE *Users)
{while(1){char name[20] = {0}, readName[20] = {0}, borrowBook[20] = {"None"};printf("              Edit Reader Name              \n");printf("[------------------------------------------]\n");printf("\t请选择需要修改的信息：\n  1.修改读者名称\n  2.返回主菜单\n");printf("[------------------------------------------]\n");int function, readNumber, find = 0;  //功能选择 读取到的序号  是否找到此书Users = fopen("d:/Users.txt","r");  //只读打开原文件  //此处创建ifUserExisted，一会用于查找是否存在相同的名字int ifNumber;char ifName[20] = {0}, ifBorrow[20] = {0};FILE *ifUserExisted = fopen("d:/Book1.txt","w");while(!feof(Users)){fscanf(Users, "%d %s %s\n", &ifNumber, ifName, ifBorrow);fprintf(ifUserExisted, "%d %s %s\n", &ifNumber, ifName, ifBorrow);  }fclose(ifUserExisted);fclose(Users);Users = fopen("d:/Users.txt","r");  //只读打开原文件scanf("%d",&function);if(function == 2){remove("d:/Users1.txt");  //有时会多余创造了文件，需要删除 return;}FILE *Users1 = fopen("d:/Users1.txt", "w");  //先新建一个文件存储更改后的信息printf("请输入需要更改的用户名：");for(int i = 0; i<20; i++)  //从输入流取得需要更改的读者名字{if(i==0)scanf("%c%c", &enter,&name[i]);elsescanf("%c",&name[i]);if(name[i]==10)  //将最后的换行符改为空{name[i]=0;break;}}if(function==1){while(!feof(Users)){fscanf(Users, "%d %s %s\n", &readNumber, readName, borrowBook);if(strcmp(name, readName)==0){  find = 1;  //找到了此读者printf("您要将读者名\"%s\"更改为：", name);char changeName[20] = {0};for(int i = 0; i<20; i++)  //从输入流取得需要更改的用户名字{if(i==0)scanf("%c",&changeName[i]);elsescanf("%c",&changeName[i]);if(changeName[i]==10)  //将最后的换行符改为空{changeName[i]=0;break;}}ifUserExisted = fopen("d:/Book1.txt","r");   //判断更改后的名字是否会和存在的用户名冲突while(!feof(ifUserExisted)){fscanf(ifUserExisted, "%d %s %s\n", &ifNumber, ifName, ifBorrow);if (strcmp(changeName, ifName)==0){printf("更改失败：已存在名称为%s的读者\n", changeName);fclose(ifUserExisted);fclose(Users);  //关闭文件fclose(Users1);return;}}fprintf(Users1, "%d %s %s\n", readNumber, changeName, borrowBook);  //写入序号 更改后的读者名 所借书籍和换行符}elsefprintf(Users1, "%d %s %s\n", readNumber, readName, borrowBook);  //写入序号 书名 数量和换行符            }if(find==0)  //若没找到此读者{printf("没有找到此读者！请重新输入\n");break;}fclose(Users);  //关闭文件fclose(Users1);Users1 = fopen("d:/Users1.txt", "r");Users = fopen("d:/Users.txt", "w+");   //刷新原文件，再次写入正确数据while(!feof(Users1)){fscanf(Users1, "%d %s %s\n", &readNumber, readName, borrowBook);fprintf(Users, "%d %s %s\n", readNumber, readName, borrowBook);}fclose(Users);fclose(Users1);remove("d:/Users1.txt");  //删除原文件              //rename("d:/Book1.txt", "d:/Book.txt");  //将更改后的文件改名为原数据文件  此方法成功率低！！！printf("更改成功!\n");}else{printf("输入格式有误，请重新输入！\n");break;}}
}//删除用户的函数
void delUsers(FILE *Users)
{while(1){printf("请输入您想删除的读者名：(输入\"-r\"返回上一级)");char delName[20] = {0};for(int i = 0; i<20; i++)  //从输入流取得需要删除的用户名字{//if(i==0)//  scanf("%c%c", &enter,&delName[i]);//elsescanf("%c",&delName[i]);if(delName[i]==10)  //将最后的换行符改为空{delName[i]=0;break;}}if(strcmp(delName, "-r")==0)  //输入返回上一级的指示后返回return;int readNumber, find = 0;char readName[20] = {0}, borrowBook[20] = {"None"};Users = fopen("d:/Users.txt","r");FILE *Users1 = fopen("d:/Users1.txt","w");while (!feof(Users)){fscanf(Users, "%d %s %s\n", &readNumber, readName, borrowBook);if(strcmp(delName, readName)==0){  find = 1;  //找到了此读者//因为要删除此条信息，所以不再向新文件中输出它}else{if(find==1)fprintf(Users1, "%d %s %s\n", readNumber-1, readName, borrowBook);  //排在删除后的写入-1的序号 读者名 所借书和换行符            elsefprintf(Users1, "%d %s %s\n", readNumber, readName, borrowBook);  //删除前的写入的序号 读者名 所借书和换行符            }            }if(find==0)  //若没找到此读者{printf("没有找到此读者！请重新输入\n");continue;}fclose(Users1);fclose(Users);Users1 = fopen("d:/Users1.txt", "r");Users = fopen("d:/Users.txt", "w+");   //刷新原文件，再次写入正确数据while(!feof(Users1)){fscanf(Users1, "%d %s %s\n", &readNumber, readName, borrowBook);fprintf(Users, "%d %s %s\n", readNumber, readName, borrowBook);}fclose(Users1);fclose(Users);remove("d:/Users1.txt");  //删除原文件              printf("删除成功!\n");}
}//借阅函数
void borrowBooking(char readerName[])
{printf("请输入您想借阅的图书名：");char name[20] = {0};for(int i = 0; i<20; i++)  //从输入流取得图书名{if(i==0)scanf("%c%c", &enter,&name[i]);elsescanf("%c",&name[i]);if(name[i]==10)  //将最后的换行符改为空{name[i]=0;break;}}char readName[20] = {0};int readNumber, readNum, find = 0;//更改被借阅的图书的信息FILE *Book = fopen("d:/Book.txt", "r");FILE *Book1 = fopen("d:/Book1.txt", "w");while (!feof(Book)){fscanf(Book, "%d %s %d\n", &readNumber, readName, &readNum);if(strcmp(name, readName)==0){  find = 1;if(readNum<1){printf("借阅失败:无剩余可借阅的%s！\n", readName);return;}fprintf(Book1, "%d %s %d\n", readNumber, readName, readNum-1); //若找到需要借阅的图书，则在此书数量上减1 } elsefprintf(Book1, "%d %s %d\n", readNumber, readName, readNum);  //删除前的写入的序号 读者名 所借书和换行符 }if(find==0)  //若没找到此书{printf("借阅失败:没有找到此书！\n");return;}fclose(Book);fclose(Book1);Book1 = fopen("d:/Book1.txt", "r");Book = fopen("d:/Book.txt", "w+");   //刷新原文件，再次写入正确数据while(!feof(Book1)){fscanf(Book1, "%d %s %d\n", &readNumber, readName, &readNum);fprintf(Book, "%d %s %d\n", readNumber, readName, readNum);}fclose(Book1);fclose(Book);remove("d:/Book1.txt");  //删除原文件 //更改读者的信息FILE *Users = fopen("d:/Users.txt", "r");FILE *Users1 = fopen("d:/Users1.txt", "w");char borrowBook[20] = {"None"};while (!feof(Users)){fscanf(Users, "%d %s %s\n", &readNumber, readName, borrowBook);if(strcmp(readerName, readName)==0)fprintf(Users1, "%d %s %s\n", readNumber, readName, name); //在读者的借阅图书上写上所借阅的图书名 elsefprintf(Users1, "%d %s %s\n", readNumber, readName, borrowBook); }fclose(Users1);fclose(Users);Users1 = fopen("d:/Users1.txt", "r");Users = fopen("d:/Users.txt", "w+");   //刷新原文件，再次写入正确数据while(!feof(Users1)){fscanf(Users1, "%d %s %s\n", &readNumber, readName, borrowBook);fprintf(Users, "%d %s %s\n", readNumber, readName, borrowBook);}fclose(Users1);fclose(Users);remove("d:/Users1.txt");  //删除原文件  有时候还是删不掉printf("借阅成功！\n");
}//还书函数
void returnBooking(char readerName[], char borrowBook[])
{char readName[20] = {0};int readNumber, readNum, find = 0;//更改被还回的图书的信息FILE *Book = fopen("d:/Book.txt", "r");FILE *Book1 = fopen("d:/Book1.txt", "w");while (!feof(Book)){fscanf(Book, "%d %s %d\n", &readNumber, readName, &readNum);if(strcmp(borrowBook, readName)==0){fprintf(Book1, "%d %s %d\n", readNumber, readName, readNum+1); //若找到被还的图书，则在此书数量上加1  find = 1;}elsefprintf(Book1, "%d %s %d\n", readNumber, readName, readNum); //不是还回的书 }fclose(Book);fclose(Book1);Book1 = fopen("d:/Book1.txt", "r");Book = fopen("d:/Book.txt", "w+");   //刷新原文件，再次写入正确数据while(!feof(Book1)){fscanf(Book1, "%d %s %d\n", &readNumber, readName, &readNum);fprintf(Book, "%d %s %d\n", readNumber, readName, readNum);}bookNumber = readNumber+1;fclose(Book1);fclose(Book);remove("d:/Book1.txt");  //删除原文件if(find==0)  //还书时没有书城中没有此书，直接添加一本{FILE *Book;Book = fopen("d:/Book.txt", "a");  fprintf(Book, "%d %s 1\n", bookNumber, borrowBook);  //写入序号 书名 数量和换行符bookNumber++; fclose(Book);}//更改读者的信息FILE *Users = fopen("d:/Users.txt", "r");FILE *Users1 = fopen("d:/Users1.txt", "w");char rborrowBook[20] = {"None"};while (!feof(Users)){fscanf(Users, "%d %s %s\n", &readNumber, readName, rborrowBook);if(strcmp(readerName, readName)==0)fprintf(Users1, "%d %s %s\n", readNumber, readName, "None"); //还回书后所借阅图书变为"None" elsefprintf(Users1, "%d %s %s\n", readNumber, readName, rborrowBook); }fclose(Users1);fclose(Users);Users1 = fopen("d:/Users1.txt", "r");Users = fopen("d:/Users.txt", "w+");   //刷新原文件，再次写入正确数据while(!feof(Users1)){fscanf(Users1, "%d %s %s\n", &readNumber, readName, rborrowBook);fprintf(Users, "%d %s %s\n", readNumber, readName, rborrowBook);}fclose(Users1);fclose(Users);remove("d:/Users1.txt");  //删除原文件  有时候还是删不掉printf("成功还回%s\n", borrowBook);
}//单独查询功能，根据编号或书名查询书被哪些人借走
void searchBook()
{while (1){int function = 0;FILE *Book = fopen("d:/Book.txt", "r");FILE *Users = fopen("d:/Users.txt", "r");char readerName[20] = {0}, bookName[20] = {0}, borrowBook[20] = {0}, name[20] = {0};int bookNumber, bookNum, find = 0, readerNumber;printf("                   Search                   \n");printf("[------------------------------------------]\n");printf("\t\t请选择查询功能：\n\t1.根据编号查询\n\t2.根据书名查询\n\t3.返回主界面\n");printf("[------------------------------------------]\n");scanf("%d",&function); // 输入需要的功能switch (function){case 1:printf("您要查找的书序号是：");scanf("%d",&function); // 输入需要查找的图书编号while(!feof(Book)){fscanf(Book, "%d %s %d\n", &bookNumber, bookName, &bookNum); //由于bookName已经表示地址，不需要取地址符if(bookNumber==function)  //发现查找的书后跳出循环{find = 1;//找到书break;}}if(find==0){printf("没有找到编号为%d的图书。\n",function);break;}printf("               Search Result                \n");printf("[------------------------------------------]\n");find = 0;//需要在查找谁借阅时再次使用printf("\t编号：\t\t%d\n\t书名：\t\t%s\n\t剩余数量：\t%d\n\t",bookNumber, bookName, bookNum);while (!feof(Users)){fscanf(Users, "%d %s %s\n", &readerNumber, readerName, borrowBook);//遍历读者查找谁借阅了这本书   if (strcmp(borrowBook, bookName)==0){if(find==0){find = 1;printf("借阅此书的读者：");printf("%s",readerName);}elseprintf(" ,%s",readerName);}}if(find==0)printf("还没有读者借阅此书。\n");elseprintf("\n");printf("[------------------------------------------]\n");printf("输入回车返回...\n");enter = getchar();enter = getchar();break;case 2:printf("您要查找的书名是：");scanf("%s",name); // 输入需要查找的图书名while(!feof(Book)){fscanf(Book, "%d %s %d\n", &bookNumber, bookName, &bookNum); //由于bookName已经表示地址，不需要取地址符if(strcmp(bookName, name)==0)  //发现查找的书后跳出循环{find = 1;//找到书break;}}if(find==0){printf("没有找到名称为%s的图书。\n",name);break;}printf("               Search Result                \n");printf("[------------------------------------------]\n");find = 0;//需要在查找谁借阅时再次使用printf("\t编号：\t\t%d\n\t书名：\t\t%s\n\t剩余数量：\t%d\n\t",bookNumber, bookName, bookNum);while (!feof(Users)){fscanf(Users, "%d %s %s\n", &readerNumber, readerName, borrowBook);//遍历读者查找谁借阅了这本书   if (strcmp(borrowBook, bookName)==0){if(find==0){find = 1;printf("借阅此书的读者：");printf("%s",readerName);}elseprintf(" ,%s",readerName);}}if(find==0)printf("还没有读者借阅此书。\n");elseprintf("\n");printf("[------------------------------------------]\n");printf("输入回车返回...\n");enter = getchar();enter = getchar();break;case 3:return;default:printf("您输入的格式有误，请重新输入\n");break;}fclose(Book);fclose(Users);}
}int main(int argc, char *argv[])  //需要从命令行读入参数
{char identity1[] = "-u";  //读者身份char identity2[] = "-a";  //管理员身份FILE *Book, *Users;  //两个文件分别存储图书信息和读者信息。int function1, function2; //功能选项/*调试用char readerName[20] = {0};int test = 0;scanf("%d %s",&test, readerName);if(test==1)*/if(strcmp(argv[1], identity2)==0)  //管理员操作界面{char Administrator[20] = "Zhang";if(strcmp(Administrator, argv[2])==0){    while(1){   printf("                    menu                    \n");printf("[------------------------------------------]\n");printf("     管理员您好！请选择您要使用的功能:\n  1.新增或修改图书信息\n  2.新增或修改读者信息\n  3.查看全部馆藏书籍\n  4.查看全部读者及其借阅信息\n  5.图书详情查询\n  6.结束程序\n");printf("[------------------------------------------]\n");scanf("%d",&function1);  switch (function1){case 1:  //更改图书信息printf("                  Books                     \n");printf("[------------------------------------------]\n");printf("\t请选择要对图书进行的操作：\n  1.添加图书信息\n  2.修改图书信息\n  3.删除图书信息\n  4.返回主菜单\n");printf("[------------------------------------------]\n");scanf("%d",&function2);  //输入第二级操作指令switch (function2){case 1:addBook(Book);  //调用添加图书函数break;case 2:changeBook(Book);  //修改函数break;case 3:scanf("%c",&enter);delBook(Book);  //删除函数break;case 4:break;default:printf("输入的值令有误，请重新输入");break;}break;case 2:  //更改读者信息printf("                  Readers                   \n");printf("[------------------------------------------]\n");printf("\t请选择要对用户进行的操作：\n  1.添加用户信息\n  2.修改用户信息\n  3.删除用户信息\n");printf("[------------------------------------------]\n");scanf("%d",&function2);  //输入第二级操作指令switch (function2){case 1:addUsers(Users);  //添加用户信息break;case 2:changeUsers(Users);  //修改用户信息break;case 3:scanf("%c",&enter);delUsers(Users);  //删除用户信息break;default:printf("输入的值令有误，请重新输入");break;}break;case 3:showBook(Book);printf("输入回车返回...\n");enter = getchar();enter = getchar();break;case 4:showUsers(Users);printf("输入回车返回...\n");enter = getchar();enter = getchar();break;case 5:searchBook();break;case 6:printf("感谢您的使用，再见！");return 0;default:printf("输入格式有误，请重新输入!");break;}}}elseprintf("管理员名有误，请重新输入！");}/*else if(test == 2)*/                       else if (strcmp(argv[1], identity1)==0)  //读者的操作界面{char readName[20] = {0}, borrowBook[20] = {"None"};int readNumber,find = 0;FILE *Users = fopen("d:/Users.txt","r");  //需要判断是否存在此用户while (!feof(Users)){fscanf(Users, "%d %s %s\n", &readNumber, readName, borrowBook);if(strcmp(argv[2], readName)==0){   find = 1;break;}}fclose(Users);if(find==0){printf("不存在用户名为%s的读者！", argv[2]);return 0;}while (1){FILE *Users = fopen("d:/Users.txt","r");  //刷新用户的借阅信息while (!feof(Users)){fscanf(Users, "%d %s %s\n", &readNumber, readName, borrowBook);if(strcmp(argv[2], readName)==0)break;}fclose(Users);printf("                    menu                    \n");printf("[------------------------------------------]\n");printf("\t读者%s您好！请选择您要使用的功能:\n  1.借阅图书\n  2.还回图书\n  3.查看全部馆藏书籍\n  4.结束程序\n", argv[2]);printf("[------------------------------------------]\n");scanf("%d",&function1);  switch (function1){case 1:  //借阅图书if(strcmp(borrowBook, "None")==0)borrowBooking(argv[2]);elseprintf("您已经借阅图书，请先还书再进行借阅操作。\n");printf("输入回车返回...\n");enter = getchar();enter = getchar();break;case 2:  //还书if(strcmp(borrowBook, "None")!=0)returnBooking(argv[2], borrowBook);elseprintf("您当前还没有借阅图书。\n");printf("输入回车返回...\n");enter = getchar();enter = getchar();break;case 3:showBook(Book);printf("输入回车返回...\n");enter = getchar();enter = getchar();break;case 4:printf("感谢您的使用，再见！");return 0;default:printf("输入格式有误，请重新输入!");break;}}}elseprintf("您输入的格式有误，请重新输入!");return 0;
}