图书借阅管理系统

书籍借阅管理，如使用图书馆APP #生活技巧# #组织技巧# #书籍管理系统#

程序设计图书借阅管理系统

图书借阅管理是学校工作中的一项重要内容，学校图书馆，书目繁多，用户的信息冗杂，且信息数据在每天变化，如果采用人工方式进行管理控制，不仅工作量庞大，而且容易出错。浪费了许多的人力和物力，已不能适应时代的发展。在当今信息时代，这种传统的管理方法必然被以计算机为基础的信息管理系统所代替，图书管理系统可以有效的管理图书资源，控制图书增加，删除，修改，学生借阅和返还的流程，缩小开支，提高工作效率与准确率，能够节省时间，既方便了管理人员，又方便了学生，对图书馆的管理有很大的帮助，极大地提高了效率。
功能：
1、管理员功能
（1）录入图书，录入数据格式：图书ID、书名、作者、书号、出版社、出版日期和单价：
（2）修改图书信息，删除图书信息；；
（3）查询图书，可按书名、作者、书号或出版社进行图书信息查询；
（4）录入借阅用户信息，包括借阅用户ID、用户名、密码、录入时间；
（5）查询借阅用户借书情况，至少包括借阅用户名、借阅图书、时间等。
2、普通用户功能：
（1）查询图书：可按书名、作者、书号或出版社进行图书信息的查询；
（2）借阅图书：根据查询到图书，进行借阅，同时库存量要相应的减少，注意：超过借书数时不能借阅；
（3）还书：还书成功后，相应的同时图书库存要增加。

界面展示（部分）

代码如下

#include<stdio.h> #include<stdlib.h> #include<string.h> #include<time.h> #include<algorithm> using namespace std; typedef struct book //图书 {char title[100]; //书名char isbn[100]; //书号char author[100]; //作者char publisher[100]; //出版社char publishtime[100];//出版日期int value; //单价int cnt; //书籍数量struct book* next; //下一本书籍 }Book; Book* book_head; //图书头指针 int book_amount; //图书总数量 struct node //用户所借书籍 {int borrow_amount, max_amount; //所借书籍数量， 最大借书数double tax; //超出时限收费比率time_t borrow_time[10], return_time[10]; //借、还时间Book borrow_book[10]; //每位最多借10本书籍 }; typedef struct user //用户 {char user_name[30]; //用户名char password[30]; //密码char ID[30]; //有效证件号码int admin; //是否管理员struct node user_book; //用户所借书籍struct user* next; //下一位用户 }User; User* user_head; //用户头指针 User* yongheng; //超级管理员账号 int user_amount; //用户总数量 void welcome_page(); //欢迎页面 void manual(); //使用手册 void main_menu(); //主菜单 void user_register(); //用户注册 void user_login(); //用户登录 void admin_login(); //管理员登陆 void user_menu(User*); //用户菜单 void user_change(User*); //更改用户信息 int delete_user(User*); //删除账号 void borrow_book(User*); //借阅管理 void return_book(User*); //还书管理 void history(User*); //历史借阅浏览 void admin_initi(); //超级管理员账号初始化 User* serch_username(char*); //查找用户名 void admin_menu(User*); //管理员菜单 void query_user(); //用户信息查询 void admin_user(); //管理用户信息 void all_history(); //查看用户图书借阅归还情况 User* serch_user(); //按序号搜索用户 void set_admin(User*); //设置管理员 void add_book(); //增加图书信息 void change_book() ; //修改图书信息 void delete_book(); //删除图书信息 void browse_book(); //图书浏览 void search_book(); void search_title(); //按书名查找 void search_author(); // 按作者查找 void search_isbn(); //按书号查找 void search_publisher(); //按出版社查找 void creat_user_list(char*, char*, char*); //创建用户链表 void creat_book_list(char*, char*, char*, char*, int); //创建图书链表 void user_initi(User*); //用户图书管理初始化 void load(); //从文件中加载数据 void save(); //保存数据到文件 int main() {welcome_page();printf("退出系统成功，祝您生活愉快！\n");//system("pause");system("cls");return 0; } void welcome_page() //欢迎页面 {load();while (1){printf("*********************** ** * \n");printf("** ** ** ** * \n");printf("** ************ ** *************** \n");printf("** ** ** ** ** ** **\n");printf("** ** ** ** ** ** \n");printf("** ** ** ** ** ** \n");printf("** ** ** ** ********************** \n");printf("** ** ** ** ** ** **\n");printf("** ** ** ** **\n");printf("** ** ** **\n");printf("** ** ** ** ** ** \n");printf("** ** ** ** **\n");printf("*********************** ** \n");printf("**************************************************\n");printf("* 欢迎使用本图书管理系统! *\n");printf("* 请输入选项前的数字以确认操作！ *\n");printf("* 1、进入系统 *\n");printf("* 2、查看使用手册 *\n");printf("* 0、退出系统 *\n");printf("**************************************************\n");int op; scanf("%d", &op); system("cls");switch (op){case 1: main_menu(); break;case 2: manual(); system("pause"); system("cls"); break;case 0: return ;default: printf("错误的指令，请重新输入！\n");system("cls"); break;}} } void manual() //使用手册 {printf("*******************************************************************************\n");printf("用户须知:\n\n初始管理员账户：yongheng\t密码：666\t证件号：1903\n\n");printf("该系统为图书借阅管理，用户和管理员具有不同的权限，\n ");printf("一、图书管理员功能（需要输入用户名、密码正确后才能使用如下功能\n");printf(" 1,录入图书，录入数据格式：图书ID、书名、作者、书号、出版社、出版日期和单价 \n");printf(" 2,修改图书信息，删除图书信息");printf(" 3,查询图书，可按书名、作者、书号或出版社进行图书信息查询；\n");printf(" 4,录入借阅用户信息，包括借阅用户ID、用户名、密码、录入时间；\n");printf(" 5,查询借阅用户借书情况，至少包括借阅用户名、借阅图书、时间等。\n");printf("二、借阅用户功能（需要输入用户名、密码正确后才能使用如下功能）\n");printf(" 1,查询图书 可按书名、作者、书号或出版社进行图书信息的查询；\n");printf(" 2,借阅图书 ，根据查询到图书，进行借阅，同时库存量要想要的减少，注意：超过借书数时不能借阅；\n");printf(" 3,还书，还书成功后，相应的同时图书库存要增加。\n");printf("*******************************************************************************\n"); } void main_menu() //主菜单 {while (1){printf("+---------------------------------------------+\n");printf("* 欢迎进入本图书管理系统! *\n");printf("* 请输入选项前的数字以确认操作！ *\n");printf("* 1、用户注册 *\n");printf("* 2、用户登陆 *\n");printf("* 3、管理员登陆 *\n");printf("* 0、返回欢迎页面 *\n");printf("+---------------------------------------------+\n");int op; scanf("%d", &op); system("cls");switch (op){case 1: user_register(); break;case 2: user_login(); break;case 3: admin_login(); break;case 0: return;default: printf("错误的指令，请重新输入！\n");system("cls"); break;}} } void user_register() //用户注册 {char name[30];printf("请输入您需要注册的用户名(不超过25个字母)：\n");scanf("%s", name);User* account;while (account = serch_username(name), account != NULL){printf("该用户名已存在，请重新输入！\n");scanf("%s", name);}printf("请输入您的账号密码(不超过25个字母)：\n");char password[30];scanf("%s", password);printf("请输入您的有效证件号码(不超过25个数字)：\n");char ID[30];scanf("%s", ID);creat_user_list(name, password, ID);printf("恭喜您注册成功！\n");++user_amount;system("cls"); } void user_login() //用户登录 {char name[30];printf("请输入您的用户名(不超过25个字母)：\n");scanf("%s", name);User* account;while (account = serch_username(name), account == NULL){system("cls");printf("该用户名不存在，请注册或重新登陆账号！\n");printf(" 返回系统输入 1 \n");printf("请输入；");scanf("%s", name);if(strcmp(name,"1")==0){system("cls");return ;}}printf("请输入您的账号密码(不超过25个字母)：\n");scanf("%s", name);if (strcmp(account->password, name)){printf("密码错误，请确认后重新登陆！\n");}printf("恭喜您登录成功,即将跳转用户界面...\n");system("cls");user_menu(account); } void admin_login() //管理员登陆 {char name[30];printf("尊敬的管理员：\n");printf("请输入您的管理账号(不超过25个字母)：\n");scanf("%s", name);User* account;while (account = serch_username(name), account == NULL){system("cls");printf("该用户名不存在，请重新登陆账号！\n");printf(" 返回系统输入 1 \n");printf("请输入；");scanf("%s", name);if(strcmp(name,"1")==0){system("cls");return ;}}if (!account->admin){printf("该账号暂无管理权限，请联系相关管理人员！\n");system("cls"); return;}printf("请输入该管理账号的密码(不超过25个字母)：\n");scanf("%s", name);if (strcmp(account->password, name)){printf("密码错误，请确认后重新登陆！\n");system("cls"); return;}printf("恭喜您登录成功,即将跳转管理界面...\n");system("cls");admin_menu(account); } void creat_user_list(char* name, char* password, char* ID) //创建用户链表 {User* np = (User*)malloc(sizeof(User));np = user_head;while (np->next) np = np->next;User* tp = (User*)malloc(sizeof(User));strcpy(tp->user_name, name);strcpy(tp->password, password);strcpy(tp->ID, ID);tp->admin = 0;tp->next = NULL;user_initi(tp);np->next = tp;save(); } void creat_book_list(char* title, char* isbn, char* author, char* publisher,char* publishtime,int value, int cnt) //创建图书链表 {Book* np = (Book*)malloc(sizeof(Book));np = book_head;while (np->next) np = np->next;Book* tb = (Book*)malloc(sizeof(Book));strcpy(tb->title, title);strcpy(tb->isbn, isbn);strcpy(tb->author, author);strcpy(tb->publisher, publisher);strcpy(tb->publishtime, publishtime);tb->value = value;tb->cnt = cnt;tb->next = NULL;np->next = tb;save(); } void user_initi(User* account) //用户图书管理初始化 {account->user_book.borrow_amount = 0;account->user_book.max_amount = 10;account->user_book.tax = 1.0;memset(account->user_book.borrow_time, 0, sizeof(account->user_book.borrow_time));memset(account->user_book.return_time, 0, sizeof(account->user_book.return_time));memset(account->user_book.borrow_book, 0, sizeof(account->user_book.borrow_book)); } void load() //从文件中加载数据 {book_head = (Book*)malloc(sizeof(Book));book_head->next = NULL;book_amount = 0;FILE* fp2;fp2 = fopen("book.bin", "rb");if (fp2 == NULL){fp2 = fopen("book.bin", "wb");if (fp2 == NULL){printf("图书存储失败！\n"); exit(0);}fclose(fp2);}else{Book* bp = (Book*)malloc(sizeof(Book));bp = book_head;Book* tp = (Book*)malloc(sizeof(Book));while (fread(tp, sizeof(Book), 1, fp2)){bp->next = tp;++book_amount;tp = tp->next;tp = (Book*)malloc(sizeof(Book));bp = bp->next;}fclose(fp2);}user_head = (User*)malloc(sizeof(User));user_head->next = NULL;user_amount = 0;FILE* fp1;fp1 = fopen("user.bin", "rb");if (fp1 == NULL){admin_initi(); return;}User* np = (User*)malloc(sizeof(User));np = user_head;User* temp = (User*)malloc(sizeof(User));while (fread(temp, sizeof(User), 1, fp1)){np->next = temp;++user_amount;temp = temp->next;temp = (User*)malloc(sizeof(User));np = np->next;}yongheng = user_head->next;fclose(fp1); } void save() //保存数据到文件 {FILE* fp = fopen("user.bin", "wb");User* temp = user_head->next;while (temp){fwrite(temp, sizeof(User), 1, fp);temp = temp->next;}fclose(fp);fp = fopen("book.bin", "wb");Book* tb = book_head->next;while (tb){fwrite(tb, sizeof(Book), 1, fp);tb = tb->next;}fclose(fp); } void user_menu(User* account) //用户菜单 {while (1){printf("+---------------------------------------------+\n");printf("* 用户：%12s 欢迎您! *\n", account->user_name);printf("* 请输入选项前的数字以确认操作！ *\n");printf("* 1、图书浏览 *\n");printf("* 2、图书查找 *\n");printf("* 3、历史借阅浏览 *\n");printf("* 4、借阅管理 *\n");printf("* 5、还书管理 *\n");printf("* 6、修改账号信息 *\n");printf("* 7、删除账号 *\n");printf("* 0、退出登陆 *\n");printf("+---------------------------------------------+\n");int op; scanf("%d", &op); system("cls");switch (op){case 1: browse_book(); system("pause"); system("cls"); break;case 2: search_book(); system("pause"); system("cls"); break;case 3: history(account); system("pause"); system("cls"); break;case 4: borrow_book(account); break;case 5: return_book(account); break;case 6: user_change(account); break;case 7: if (delete_user(account)){printf("该账号已被删除，请重新登陆！\n");system("cls");return;}else break;case 0: printf("账号登出成功!\n");system("cls"); return;default: printf("错误的指令，请重新输入！\n");system("cls"); break;}} } void user_change(User* account) //更改用户信息 {printf("待修改用户：%s\t 您现在可以更改您的个人信息!\n", account->user_name);char Name[30];printf("请输入新的用户名(不超过25个字母)：\n");scanf("%s", Name);strcpy(account->user_name, Name);printf("请重新输入您的密码(不超过25个字母)：\n");char password[30];scanf("%s", password);strcpy(account->password, password);printf("用户%s\t账号密码已修改！\n", account->user_name);printf("请重新输入您的有效证件号码(不超过25个字母)：\n");char ID[30];scanf("%s", ID);strcpy(account->ID, ID);printf("用户%s\t有效证件号码已修改！\n", account->user_name);save();printf("用户%s\t个人信息修改成功，正在返回上一界面...\n", account->user_name);system("cls"); } int delete_user(User* account) //删除账号 {printf("********************************************\n");if (!strcmp(account->user_name, yongheng->user_name)){printf("用户%s拥有最高权限，不可被删除！！！\n", yongheng->user_name);system("cls"); return 0;}printf("是否需要删除账号%s？\n", account->user_name);printf("请输入相应数字以继续操作！\n");printf("1、是\t0、否\n");int op; scanf("%d", &op);if (op == 1){if (account->user_book.borrow_amount){printf("删除失败！该用户有%d本图书未归还！请先归还所借阅图书！\n", account->user_book.borrow_amount);}else{User* tp = (User*)malloc(sizeof(User));tp = user_head;User* np = (User*)malloc(sizeof(User));np = user_head->next;while (np){if (!strcmp(np->user_name, account->user_name)){tp->next = np->next;free(np); --user_amount;save();printf("账号已删除成功！\n");system("pause"); system("cls");return 1;}tp = np;np = np->next;}}}else if (!op) printf("已取消本次操作！\n");else printf("输入选项错误，请重新输入！正在返回上一层...\n");system("pause"); system("cls"); return 0; } void borrow_book(User* account) //借阅管理 {printf("用户%s：请输入您的有效身份证件号码(不超过25位)以继续！\n", account->user_name);char ID[30]; scanf("%s", ID); system("cls");while (strcmp(account->ID, ID)){system("cls");printf("身份证件号码与账号不匹配，请检查后重新输入！\n");scanf("%s", ID);}while (1){int ans = account->user_book.borrow_amount, Max = account->user_book.max_amount;if (ans == Max){printf("用户%s：借阅图书数量 %d 本，已达上限 %d 本，请先归还部分图书！\n", account->user_name, ans, Max);system("pause"); system("cls"); return;}browse_book();printf("请输入您需要借阅的书籍序号(输入 0 退出删除操作)：\n");int cnt; scanf("%d", &cnt);if (cnt == 0){printf("已成功退出借阅系统！\n"); system("pause"); system("cls");return;}else if (cnt > book_amount || cnt < 0){printf("请正确输入上图中已有的图书序号！\n");}else{printf("请设置您需要借阅的时间(不超过90天)：\n");int day; scanf("%d", &day);if (day > 90 || day <= 0)printf("输入借阅时间不被允许，请重新输入！\n");else{Book* tb = (Book*)malloc(sizeof(Book));tb = book_head->next;for (int i = 1; i < cnt; ++i)tb = tb->next;tb->cnt--;account->user_book.borrow_book[ans] = *tb;account->user_book.borrow_time[ans] = time(NULL);account->user_book.return_time[ans] = time(NULL) + day * 3600 * 24;++account->user_book.borrow_amount;save();printf("用户%s：借阅图书《%s》成功！\n", account->user_name, tb->title);}}system("pause"); system("cls");} } void return_book(User * account) //还书管理 {while (1){history(account);if (!account->user_book.borrow_amount){system("pause"); system("cls"); return;}printf("请输入您需要归还的书籍序号（输入-1以退出还书系统）！\n");int cnt = 0; scanf("%d", &cnt); system("cls");if (cnt == -1){printf("正在退出还阅系统，请稍后...\n");system("pause"); system("cls"); return;}if (cnt > account->user_book.borrow_amount || cnt < 0){printf("请正确输入上述书籍序号！\n");}else{int i = 0;for (--cnt; i < cnt; ++i);Book* tb = (Book*)malloc(sizeof(Book));tb = book_head->next;for (int i = 1; i < cnt; ++i)tb = tb->next;tb->cnt++;char title[100];strcpy(title, account->user_book.borrow_book[i].title);time_t t = time(NULL);printf("*************************************************\n");printf("规定还书时间：%s", ctime(&account->user_book.return_time[i]));printf("当前时间：%s", ctime(&t));t -= account->user_book.return_time[i];if (t > 0){double cost = t / 3600.0 / 24 * account->user_book.tax;printf("由于您未在指定日期内归还《%s》,您需要支付违约金%.2lf元\n", title, cost);}else printf("书籍《%s》借阅未超出时间，无需支付违约金！\n", title);for (; i < account->user_book.borrow_amount; ++i){account->user_book.borrow_book[i] = account->user_book.borrow_book[i + 1];account->user_book.borrow_time[i] = account->user_book.borrow_time[i + 1];account->user_book.return_time[i] = account->user_book.return_time[i + 1];}--account->user_book.borrow_amount;save();printf("书籍《%s》归还成功！\n", title);}system("pause"); system("cls");} } void history(User * account) //历史借阅浏览 {int n = account->user_book.borrow_amount;printf("*************************************************************\n");printf("用户%s：\n", account->user_name);if (!n){printf("暂无书籍在借阅记录！\n"); return;}printf("借阅书籍序号：\n");for (int i = 0; i < n; ++i){struct node t = account->user_book;time_t nt = time(NULL) - t.return_time[i];double cost = 0.0;if (nt > 0) cost = t.tax * (nt / 3600.0 / 24);printf("%d：\n", i + 1);printf(" 书名：《%s》\n", t.borrow_book[i].title);printf(" 借阅日期：%s", ctime(&t.borrow_time[i]));printf(" 规定还书日期：%s", ctime(&t.return_time[i]));if (nt > 0) printf(" 是否超时：是\n");else printf(" 是否超时：否\n");printf(" 借阅费用：%.2lf\n", cost);} } void admin_initi() //超级管理员账号初始化 {FILE* fp = fopen("user.bin", "wb");if (fp == NULL){printf("管理员权限初始化失败！\n"); exit(0);}yongheng = (User*)malloc(sizeof(User));strcpy(yongheng->user_name, "yongheng");strcpy(yongheng->password, "666");strcpy(yongheng->ID, "1903");yongheng->admin = 1;yongheng->next = NULL;user_initi(yongheng);user_head->next = yongheng;user_amount = 1;save();fclose(fp); } User* serch_username(char* name) //查找用户名 {User* np = user_head->next;while (np){if (!strcmp(np->user_name, name)) return np;np = np->next;}return NULL; } void admin_menu(User * account) //管理员菜单 {while (1){printf("*************************************************\n");printf("* 用户：%12s 欢迎您! *\n", account->user_name);printf("* 请输入选项前的数字以确认操作！ *\n");printf("* 1、增加图书信息 *\n");printf("* 2、修改图书信息 *\n");printf("* 3、删除图书信息 *\n");printf("* 4、图书浏览 *\n");printf("* 5、图书查找 *\n");printf("* 6、管理用户信息 *\n");printf("* 0、退出登陆 *\n");printf("*************************************************\n");int op; scanf("%d", &op); system("cls");switch (op){case 1: add_book(); break;case 2: change_book(); break;case 3: delete_book(); break;case 4: browse_book(); system("pause"); system("cls"); break;case 5: search_book(); break;case 6: admin_user(); break;case 0: printf("退出管理账号成功!\n"); system("pause"); system("cls"); return;default: printf("错误的指令，请重新输入！\n"); system("pause"); system("cls"); break;}} } void query_user() //用户信息查询 {int cnt = 1;User* np = (User*)malloc(sizeof(User));np = user_head->next;printf("序号 用户名\t\t密码\t\t证件号码\t\t是否管理员\n");while (np){printf("%d、 %-20s %-20s %-20s", cnt, np->user_name, np->password, np->ID);if (np->admin) printf(" 是\n");else printf(" 否\n");np = np->next;++cnt;} } void admin_user() //管理用户信息 {while (1){printf("*************************************************\n");printf("* 欢迎进入用户管理界面！ *\n");printf("* 请输入选项前的数字以确认操作！ *\n");printf("* 1、查看用户个人信息 *\n");printf("* 2、修改用户个人信息 *\n");printf("* 3、删除用户账号 *\n");printf("* 4、查看用户图书借阅归还情况 *\n");printf("* 5、设置管理员权限 *\n");printf("* 0、返回总管理界面 *\n");printf("*************************************************\n");User* np = (User*)malloc(sizeof(User));int op; scanf("%d", &op); system("cls");switch (op){case 1: query_user(); system("pause"); system("cls"); break;case 2: if (np = serch_user(), np != NULL) user_change(np);else{system("cls");}break;case 3:if (np = serch_user(), np != NULL){int admin = np->admin;if (delete_user(np) && admin)printf("该账号已被删除，请重新登陆！\n");system("pause"); system("cls");return;} else{system("pause"); system("cls");} break;case 4: all_history(); break;case 5: if (np = serch_user(), np != NULL) set_admin(np);else{system("cls");}break;case 0: printf("退出用户管理界面成功!\n"); system("pause"); system("cls"); return;default: printf("错误的指令，请重新输入！\n"); system("pause"); system("cls"); break;}} } void all_history() //查看用户图书借阅归还情况 {while (1){printf("###########################################################\n");printf("欢迎使用用户图书借阅归还查询系统！\n");User* account = (User*)malloc(sizeof(User));account = serch_user();if (account){history(account);printf("查阅成功！正在返回上一层...\n");system("pause"); system("cls"); return;}system("cls");} } User* serch_user() //按序号搜索用户 {query_user();printf("请输入待操作的用户序号：\n");int cnt; scanf("%d", &cnt); system("cls");if (cnt > user_amount || cnt <= 0)printf("请正确输入上图中待操作的用户序号！\n");else{User* tb = (User*)malloc(sizeof(User));tb = user_head->next;for (int i = 1; i < cnt; ++i)tb = tb->next;return tb;}return NULL; } void set_admin(User * account) //设置管理员 {printf("*******************************************************************\n");if (!strcmp(account->user_name, yongheng->user_name)){printf("用户%s拥有最高管理权限，不可被修改！！！正在返回上一层...\n", yongheng->user_name);system("cls"); return;}printf("是否确认将用户%s设置为管理员？\n", account->user_name);printf("请输入相应数字以继续操作！\n");printf("1、设置为管理员\t0、取消管理员权限\n");int op; scanf("%d", &op);if (op == 1){account->admin = op;printf("用户%s\t管理员权限设置成功！\n", account->user_name);}else if (op == 0){account->admin = op;printf("用户%s\t管理员权限已被取消！\n", account->user_name);}else{printf("设置管理员权限失败，请按要求输入！\n");}printf("*******************************************************************\n");save();system("cls"); } void add_book() //增加图书信息 {char title[100], isbn[100], author[100], publisher[100], publishtime[100];int value,cnt;printf("请输入需要添加的书籍名称：\n");scanf("%s", title);printf("请输入需要添加的书籍书号：\n");scanf("%s", isbn);printf("请输入需要添加的书籍作者：\n");scanf("%s", author);printf("请输入需要添加的书出版社：\n");scanf("%s", publisher);printf("请输入需要添加的书出版日期：\n");scanf("%s", publishtime);printf("请输入需要添加的图书单价：\n");scanf("%d", &value);printf("请输入需要添加的书籍数量：\n");scanf("%d", &cnt);++book_amount;creat_book_list(title, isbn, author, publisher, publishtime, value, cnt);printf("添加书籍《%s》成功！\n", title);system("pause"); system("cls"); } void change_book() //修改图书信息 {while(1){browse_book();printf("请输入待修改的书籍序号(输入 0 退出修改操作)：\n");int cnt; scanf("%d", &cnt);if (cnt == 0){printf("已成功退出修改系统！\n"); system("pause"); system("cls");return;}else if (cnt > book_amount || cnt < 0){printf("请正确输入上图中待修改的图书序号！\n");}else{Book* tb = (Book*)malloc(sizeof(Book));tb = book_head->next;int dd=1;while (tb){if(dd==cnt){char title[100], isbn[100], author[100], publisher[100],publishtime[100];int value,cnt;printf("请输入修改后的书籍名称：\n");scanf("%s", title);printf("请输入修改后的籍书号：\n");scanf("%s", isbn);printf("请输入修改后的书籍作者：\n");scanf("%s", author);printf("请输入修改后的出版社：\n");scanf("%s", publisher);printf("请输入修改后的出版日期：\n");scanf("%s", publishtime);printf("请输入修改后的图书单价：\n");scanf("%d", &value);printf("请输入修改后的书籍数量：\n");scanf("%d", &cnt);strcpy(tb->title,title);strcpy(tb->isbn,isbn);strcpy(tb->author,author);strcpy(tb->publisher,publisher);strcpy(tb->publishtime,publishtime);tb->value=value;tb->cnt=cnt;break;}tb = tb->next; ++dd;}}system("pause"); system("cls");} } void delete_book() //删除图书信息 {while (1){browse_book();printf("请输入待删除的书籍序号(输入 0 退出删除操作)：\n");int cnt; scanf("%d", &cnt);if (cnt == 0){printf("已成功退出删除系统！\n"); system("pause"); system("cls");return;}else if (cnt > book_amount || cnt < 0){printf("请正确输入上图中待删除的图书序号！\n");}else{Book* tb = (Book*)malloc(sizeof(Book));Book* np = (Book*)malloc(sizeof(Book));np = book_head;tb = book_head->next;for (int i = 1; i < cnt; ++i){np = tb;tb = tb->next;}np->next = tb->next;free(tb); --book_amount;save();printf("该图书已从馆内删除成功！\n");}system("pause"); system("cls");} } void browse_book() //图书浏览 {int cnt = 1;if (!book_amount){printf("馆内暂无图书资料，请联系管理员添加书籍！\n");return;}Book* tb = (Book*)malloc(sizeof(Book));tb = book_head->next;printf("馆内图书详情如下：\n");printf("+--------------------------------------------------------------------------------+\n"); printf("|序号| 书名 | 书号 | 作者 | 出版社 | 出版日期 |单价|数量|\n"); printf("+--------------------------------------------------------------------------------+\n");while (tb){printf("|%4d|%12s|%12s|%12s|%12s|%12s|%4d|%4d|\n", cnt, tb->title, tb->isbn,tb->author, tb->publisher,tb->publishtime,tb->value, tb->cnt);tb = tb->next; ++cnt;} } void search_book()//tu { while(1){ printf("+------------------------------------+\n"); printf("* 请输入选项前的数字以确认操作 *\n");printf("* 1、按书名查找 *\n");printf("* 2、按作者查找 *\n");printf("* 3、按书号查找 *\n");printf("* 4、按出版社查找 *\n");printf("* 0、返回欢迎页面 *\n");printf("+------------------------------------+\n");int op; scanf("%d", &op); system("cls");switch (op){case 1: search_title(); system("pause"); system("cls"); break;case 2: search_author(); system("pause"); system("cls"); break;case 3: search_isbn(); system("pause"); system("cls"); break;case 4: search_publisher(); system("pause"); system("cls"); break;case 0: system("pause"); system("cls"); return ;default: printf("错误的指令，请重新输入！\n");system("cls"); break;}} } void search_title() //按书名查找 {Book* tb = (Book*)malloc(sizeof(Book));tb = book_head->next;printf("请输入查找书名\n");char name[100];scanf("%s",name);printf("+--------------------------------------------------------------------------+\n"); printf("| 书名 | 书号 | 作者 | 出版社 | 出版日期 |单价|数量|\n"); printf("+--------------------------------------------------------------------------+\n");while (tb){if(strcmp(tb->title,name)==0){printf("|%12s|%12s|%12s|%12s|%12s|%4d|%4d|\n", tb->title, tb->isbn,tb->author, tb->publisher,tb->publishtime,tb->value, tb->cnt);}tb = tb->next;} } void search_author() // 按作者查找 {Book* tb = (Book*)malloc(sizeof(Book));tb = book_head->next;printf("请输入图书作者\n");char name[100];scanf("%s",name);printf("+--------------------------------------------------------------------------+\n"); printf("| 书名 | 书号 | 作者 | 出版社 | 出版日期 |单价|数量|\n"); printf("+--------------------------------------------------------------------------+\n");while (tb){if(strcmp(tb->author,name)==0){printf("|%12s|%12s|%12s|%12s|%12s|%4d|%4d|\n", tb->title, tb->isbn,tb->author, tb->publisher,tb->publishtime,tb->value, tb->cnt);}tb = tb->next;} } void search_isbn() //按书号查找 {Book* tb = (Book*)malloc(sizeof(Book));tb = book_head->next;printf("请输入查找书号\n");char name[100];scanf("%s",name); printf("+--------------------------------------------------------------------------+\n"); printf("| 书名 | 书号 | 作者 | 出版社 | 出版日期 |单价|数量|\n"); printf("+--------------------------------------------------------------------------+\n");while (tb){if(strcmp(tb->isbn,name)==0){printf("|%12s|%12s|%12s|%12s|%12s|%4d|%4d|\n", tb->title, tb->isbn,tb->author, tb->publisher,tb->publishtime,tb->value, tb->cnt);}tb = tb->next;} } void search_publisher() //按出版社查找 {Book* tb = (Book*)malloc(sizeof(Book));tb = book_head->next;printf("请输入出版社名称\n");char name[100];scanf("%s",name);printf("+--------------------------------------------------------------------------+\n"); printf("| 书名 | 书号 | 作者 | 出版社 | 出版日期 |单价|数量|\n"); printf("+--------------------------------------------------------------------------+\n");while (tb){if(strcmp(tb->publisher,name)==0){printf("|%12s|%12s|%12s|%12s|%12s|%4d|%4d|\n", tb->title, tb->isbn,tb->author, tb->publisher,tb->publishtime,tb->value, tb->cnt);}tb = tb->next;} }

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