图书馆管理系统
程序描述：该程序主要采用链表的形式来对书籍进行添加、修改、删除等等一系列操作，系统内含有用户以及管理员两种形式的访问人员，通过用户以及管理员的形式去对于书籍的一些借阅、归还、添加、删除、修改的操作。对于这些书籍以及用户和管理员的属性的修改都会实时的保存到文本文件中，以方便下一次的读取。
主要功能：用户的登陆和注册，管理员的登陆和注册，用户对于书籍的借阅、归还以及查看已借书籍的信息，管理员对于书籍的添加、删除、修改以及书籍的实时信息查询和用户的信息查询。
编程语言：C语言
涉及范围：结构体、链表、文件
#include<stdio.h>#include<string.h>#include<stdlib.h>#include<math.h>#include<windows.h>struct userstruct /*用户*/{int bookcount;char username[10];char scert[10];char booklist[10][20];struct userstruct *next;};struct adminstruct /*管理员*/{char adminname[10];char scert[10];struct adminstruct *next;};struct bookstruct{int id;char bookname[10];char author[10];int year;int month;int day;int count;struct bookstruct *next;};struct userstruct *head = NULL, *end = NULL;struct adminstruct *adminhead = NULL, *adminend = NULL;struct bookstruct *bookhead = NULL, *bookend = NULL;int usercount, admincount, bookcount;void startsys();void readuserfile();void readadminfile();void readbookfile();void userlogin();void userfunction(struct userstruct *p);void userregister();void adminlogin();void adminregister();void adminfunction();void borrowbook(struct userstruct *userp);void findbook(struct userstruct *userp);void returnbook(struct userstruct *userp);void addbook();void deletebook();void searchbook();void changebook();void searchuser();void writefile(int flag);void changuserbook(char *userbookname,char *bookname);void deleteuserbook(char *bookname);int main(){FILE *fp;head = (struct userstruct *)malloc(sizeof(struct userstruct));adminhead = (struct adminstruct *)malloc(sizeof(struct adminstruct));bookhead = (struct bookstruct *)malloc(sizeof(struct bookstruct));fp = fopen("user", "a+");usercount = fread(head, sizeof(struct userstruct), 1, fp);fclose(fp);end = head;readuserfile();fp = fopen("admin", "a+");admincount = fread(adminhead, sizeof(struct adminstruct), 1, fp);fclose(fp);adminend = adminhead;readadminfile();fp = fopen("book", "a+");bookcount = fread(bookhead, sizeof(struct bookstruct), 1, fp);fclose(fp);bookend = bookhead;readbookfile();startsys();return 0;}void startsys(){int cmd;int end = 0;while (1){system("cls");printf("\n\n\n\n\n\n\n");printf("**************************************************************");printf("\n图书馆管理系统\n");printf("1.用户登陆\n");printf("2.管理员登陆\n");printf("3.用户注册\n");printf("4.管理员注册\n");printf("0.退出\n");printf("**************************************************************");printf("\n\n\n\n\n\n\n");printf("输入你需要进行的操作: ");scanf("%d", &cmd);getchar();switch (cmd){case 1:userlogin();break;case 2:adminlogin();break;case 3:userregister();break;case 4:adminregister();break;case 0:end = 1;break;default:printf("错误输入!\n");}if (end == 1)break;}}void userlogin(){struct userstruct *p;char username[100];char scert[100];int exist = 0;FILE *fp;p = head;system("cls");printf("\n\n\n\n\n\n\n");printf("**************************************************************");printf("\n输入您的用户信息: \n");printf("username: ");gets(username);printf("userscert: ");gets(scert);printf("**************************************************************");printf("\n\n\n\n\n\n\n");while (p != NULL){if (strcmp(p->username, username) == 0){exist = 1;while(strcmp(p->scert, scert) != 0){printf("密码错误!请重新输入\n");printf("userscert: ");gets(scert);}printf("用户%s登陆成功!3秒后自动跳转至用户界面...", p->username);Sleep(3000);userfunction(p);}p = p->next;}if (!exist){printf("不存在此用户名,请先前往注册...\n");printf("3秒后自动跳转至主界面...");Sleep(3000);}}void userfunction(struct userstruct *p){int cmd;int end = 0;while (1){system("cls");printf("\n\n\n\n\n\n\n");printf("**************************************************************");printf("\n图书馆用户功能系统\n");printf("1.借阅书籍\n");printf("2.归还书籍\n");printf("3.已借阅书籍信息\n");printf("0.退出\n");printf("**************************************************************");printf("\n\n\n\n\n\n\n");printf("输入您需要进行的操作: ");scanf("%d", &cmd);switch (cmd){case 1:borrowbook(p);break;case 2:returnbook(p);break;case 3:findbook(p);break;case 0:end = 1;break;default:printf("错误的输入!\n");}if (end == 1)break;}}void userregister(){struct userstruct *p;char username[1000];char scert[1000];FILE *fp;system("cls");if (usercount == 0) //第一次添加{printf("username: ");while (gets(username)){if (strlen(username) < 10 && !isexist(username, 0))break;else if (isexist(username, 0)){printf("该用户名已经存在!\n");printf("username: ");}else{printf("too long\n");printf("username: ");}}strcpy(head->username, username);printf("userscert: ");while (gets(scert)){if (strlen(scert) < 10)break;elseprintf("too long");}strcpy(head->scert, scert);head->bookcount = 0;end = head;end->next = NULL;}else{p = (struct userstruct *)malloc(sizeof(struct userstruct));printf("username: ");while (gets(username)){if (strlen(username) < 10 && !isexist(username, 0))break;else if (isexist(username, 0)){printf("该用户名已经存在!\n");printf("username: ");}else{printf("too long\n");printf("username: ");}}strcpy(p->username, username);printf("userscert: ");while (gets(scert)){if (strlen(scert) < 10)break;elseprintf("too long");}strcpy(p->scert, scert);p->bookcount = 0;end->next = p;end = p;end->next = NULL;}usercount++;fp = fopen("user", "w");p = head;while (p != NULL){fwrite(p, sizeof(struct userstruct), 1, fp);p = p->next;}fclose(fp);system("cls");printf("用户%s创建成功\n", end->username);printf("3秒后自动返回主界面....\n");Sleep(3000);}int isexist(char *name,int flag){if (flag == 0){struct userstruct *p;p = head;while (p != NULL && usercount != 0){if (strcmp(name, p->username) == 0)return 1;p = p->next;}}else if (flag == 1){struct adminstruct *p;p = adminhead;while (p != NULL){if (strcmp(name, p->adminname) == 0)return 1;p = p->next;}}else if (flag == 2){struct bookstruct *p;p = bookhead;while (p != NULL){if (strcmp(name, p->bookname) == 0)return 1;p = p->next;}}return 0;}void adminlogin(){struct adminstruct *p;char adminname[100];char adminscert[100];p = adminhead;system("cls");printf("\n\n\n\n\n\n\n");printf("**************************************************************");printf("\n输入您的管理员信息: \n");printf("adminname: ");gets(adminname);printf("adminscert: ");gets(adminscert);printf("**************************************************************");printf("\n\n\n\n\n\n\n");while (p != NULL){if (strcmp(p->adminname, adminname) == 0){while (strcmp(p->scert, adminscert) != 0){printf("密码错误!请重新输入\n");printf("adminscert: ");gets(adminscert);}printf("管理员%s登陆成功!3秒后自动跳转至用户界面...", p->adminname);Sleep(3000);adminfunction(p);}p = p->next;}}void adminfunction(){int cmd;int end = 0;while (1){system("cls");printf("\n\n\n\n\n\n\n");printf("**************************************************************");printf("\n图书馆管理员功能系统\n");printf("1.添加书籍信息\n");printf("2.删除书籍信息\n");printf("3.修改书籍信息\n");printf("4.查询书籍信息\n");printf("5.查询用户信息\n");printf("0.退出\n");printf("**************************************************************");printf("\n\n\n\n\n\n\n");printf("输入您需要进行的操作: ");scanf("%d", &cmd);getchar();switch (cmd){case 1:addbook();break;case 2:deletebook();break;case 3:changebook();break;case 4:searchbook();break;case 5:searchuser();break;case 0:end = 1;break;default:printf("错误的输入!\n");}if (end == 1)break;}}void adminregister(){struct adminstruct *p;char adminname[1000];char adminscert[1000];FILE *fp;system("cls");if (admincount == 0) //第一次添加{adminhead = (struct adminstruct *)malloc(sizeof(struct adminstruct));printf("adminname: ");while (gets(adminname)){if (strlen(adminname) < 10)break;elseprintf("too long");}strcpy(adminhead->adminname, adminname);printf("adminscert: ");while (gets(adminscert)){if (strlen(adminscert) < 10)break;elseprintf("too long");}strcpy(adminhead->scert, adminscert);adminend = adminhead;adminend->next = NULL;}else{p = (struct adminstruct *)malloc(sizeof(struct adminstruct));printf("adminname: ");while (gets(adminname)){if (strlen(adminname) < 10)break;elseprintf("too long");}strcpy(p->adminname, adminname);printf("adminscert: ");while (gets(adminscert)){if (strlen(adminscert) < 10)break;elseprintf("too long");}strcpy(p->scert, adminscert);adminend->next = p;adminend = p;adminend->next = NULL;}admincount++;fp = fopen("admin", "w");p = adminhead;while (p != NULL){fwrite(p, sizeof(struct adminstruct), 1, fp);p = p->next;}fclose(fp);system("cls");printf("管理员%s创建成功\n", adminend->adminname);printf("3秒后自动返回主界面....\n");Sleep(3000);}void borrowbook(struct userstruct *userp){struct bookstruct *p;char bookname[100];int exist = 0;system("cls");p = bookhead;while (p != NULL){printf("bookname: %10s\tbookcount: %3d\n", p->bookname, p->count);p = p->next;}printf("输入您需要借阅的书籍名称: ");getchar();gets(bookname);p = bookhead;while (p != NULL){if (strcmp(bookname, p->bookname) == 0){if (p->count == 0)printf("此书无余量...");else{p->count -= 1;userp->bookcount++;strcpy(userp->booklist[userp->bookcount - 1], p->bookname);writefile(0);writefile(2);exist = 1;break;}}p = p->next;}if (exist == 0)printf("不存在此书!\n");elseprintf("%s借阅成功", p->bookname);printf("3秒后返回用户界面...");Sleep(3000);}void returnbook(struct userstruct *userp){struct bookstruct *p;char bookname[100];int count = userp->bookcount;int exist;int flag;system("cls");p = bookhead;while (count--){printf("booklist:\n");printf("%s\n", userp->booklist[count]);}printf("\n\n\n\n\n");printf("**************************************************************");printf("\n输入你需要归还的书籍名称: ");getchar();while (gets(bookname)){exist = 0;for (int i = 0; i < userp->bookcount; i++){if (strcmp(bookname, userp->booklist[i]) == 0){flag = i;exist = 1;break;}}if (!exist){printf("你借阅的书籍中不存在此书籍...\n");printf("请重新输入你需要归还的书籍名称: ");}elsebreak;}printf("**************************************************************");while (p != NULL){if (strcmp(p->bookname, bookname) == 0){p->count++;break;}p = p->next;}for (int i = flag; i < userp->bookcount - 1; i++){strcpy(userp->booklist[i], userp->booklist[i + 1]);}userp->bookcount--;writefile(0);writefile(2);printf("\n%s归还成功...", bookname);printf("3秒后自动跳转回用户界面...");Sleep(3000);}void findbook(struct userstruct *userp){int count = userp->bookcount;int n;system("cls");printf("\n\n\n\n\n");printf("**************************************************************");printf("\nbooklist:\n");while (count--){printf("%s\n", userp->booklist[count]);}printf("**************************************************************");printf("\n输入0返回用户界面: ");while (1){scanf("%d", &n);if (n == 0)break;elseprintf("无效的输入，请重新输入: ");}}void addbook(){struct bookstruct *p;char bookname[100];FILE *fp;system("cls");if (bookcount == 0){printf("输入新增书籍的书名: ");while (gets(bookname)){if (strlen(bookname) > 10)printf("too long\n");elsebreak;}strcpy(bookhead->bookname, bookname);printf("id: ");scanf("%d", &bookhead->id);printf("author: ");scanf("%s", bookhead->author);printf("bookyear: ");scanf("%d", &bookhead->year);printf("bookmonth: ");scanf("%d", &bookhead->month);printf("bookday: ");scanf("%d", &bookhead->day);printf("bookcount: ");scanf("%d", &bookhead->count);bookend = bookhead;bookend->next = NULL;}else{printf("输入新增书籍的书名: ");while (gets(bookname)){if (strlen(bookname) > 10)printf("too long\n");elsebreak;}int isexist = 0;p = bookhead;while (p != NULL){if (strcmp(bookname, p->bookname) == 0){isexist = 1;break;}p = p->next;}if (isexist == 1){int count;printf("输入新添书籍的数量: ");scanf("%d", &count);p->count += count;}else{p = (struct bookstruct *)malloc(sizeof(struct bookstruct));strcpy(p->bookname, bookname);printf("id: ");scanf("%d", &p->id);printf("author: ");scanf("%s", p->author);printf("bookyear: ");scanf("%d", &p->year);printf("bookmonth: ");scanf("%d", &p->month);printf("bookday: ");scanf("%d", &p->day);printf("bookcount: ");scanf("%d", &p->count);bookend->next = p;bookend = p;bookend->next = NULL;}}bookcount++;p = bookhead;fp = fopen("book", "w");while (p != NULL){fwrite(p, sizeof(struct bookstruct), 1, fp);p = p->next;}fclose(fp);system("cls");printf("书籍添加成功\n");printf("3秒后自动返回管理员界面....\n");Sleep(3000);}void deletebook(){struct bookstruct *bookp;char bookname[100];int exist = 0;bookp = bookhead;printf("输入你需要删除的书籍名称: ");while (gets(bookname)){while (bookp != NULL){if (strcmp(bookname, bookp->bookname) == 0){exist = 1;break;}bookp = bookp->next;}if (!exist){printf("不存在此书籍名称的书籍...\n");printf("请重新输入: ");}elsebreak;}deleteuserbook(bookname);bookp = bookhead;if (strcmp(bookhead->bookname,bookname) == 0)bookhead = bookhead->next;while (bookp->next != NULL){if (strcmp(bookp->next->bookname, bookname) == 0){bookp->next = bookp->next->next;break;}bookp = bookp->next;}bookp = NULL;writefile(2);}void searchbook(){struct bookstruct *p;char bookname[100];int exist = 0;system("cls");printf("\n\n\n\n\n\n\n");printf("\n请输入您需要查询的书籍名称或书籍编号: ");gets(bookname);printf("\n\n\n\n\n\n\n");p = bookhead;while (p != NULL){if (strcmp(p->bookname, bookname) == 0){printf("**************************************************************");printf("\nbookname: ");puts(p->bookname);printf("bookid: %d\n", p->id);printf("author: %s\n", p->author);printf("year/month/day: %d/%d/%d\n", p->year, p->month, p->day);printf("bookcount: %d\n", p->count);printf("**************************************************************\n");exist = 1;break;}p = p->next;}if (exist == 0)printf("未找到相关书籍...\n");printf("输入0返回管理员界面: ");int n;while (1){scanf("%d", &n);if (n == 0)break;}}void changebook(){struct bookstruct *bookp;char bookname[100];int exist = 0;int end = 0;int bookyear, bookmonth, bookday, bookid, count;char bookauthor[100];bookp = bookhead;system("cls");printf("booklist:\n");while (bookp != NULL){printf("bookname: %10s\n", bookp->bookname);bookp = bookp->next;}bookp = bookhead;printf("输入你需要修改的书籍名称(按@退出): ");while (gets(bookname)){if (strcmp(bookname, "@") == 0)break;while (bookp != NULL){if (strcmp(bookp->bookname, bookname) == 0){exist = 1;break;}bookp = bookp->next;}if (!exist)printf("不存在该书籍名称，请重新输入: ");elsebreak;}if (!exist)return;else{int cmd;system("cls");printf("\n\n\n\n\n\n\n");printf("**************************************************************\n");printf("1.修改书籍名称\n");printf("2.修改书籍id号\n");printf("3.修改书籍日期\n");printf("4.修改书籍数量\n");printf("5.修改书籍作者\n");printf("0.退出\n");printf("**************************************************************");printf("\n\n\n\n\n\n\n");while (1){printf("输入您需要进行的操作: ");scanf("%d", &cmd);switch (cmd){case 1:{printf("输入你修改后的书籍名称: ");scanf("%s", bookname);changuserbook(bookp->bookname,bookname);strcpy(bookp->bookname, bookname);break;}case 2:{printf("输入你修改后的书籍ID: ");scanf("%d", &bookid);bookp->id = bookid;break;}case 3:{printf("输入你修改后的书籍日期: ");scanf("%d%d%d", &bookyear, &bookmonth, &bookday);bookp->year = bookyear;bookp->month = bookmonth;bookp->day = bookday;break;}case 4:{printf("输入你修改后的书籍数量: ");scanf("%d", &count);bookp->count = count;break;}case 5:{printf("输入你修改后的书籍作者: ");scanf("%s", bookauthor);strcpy(bookp->author, bookauthor);break;}case 0:{end = 1;break;}}if (end == 1)break;}}writefile(2);}void searchuser(){struct userstruct *p;char username[100];int flag = 0;p = head;system("cls");printf("\n\n\n\n\n\n\n");printf("**************************************************************");printf("\n输入您需要查询的用户名!\n");printf("username: ");gets(username);while (p != NULL){if (strcmp(p->username, username) == 0){flag = 1;break;}p = p->next;}if (flag == 0){system("cls");printf("不存在该用户信息\n");printf("3秒后自动跳转至管理员页面...\n");Sleep(3000);return;}else{int n;while (1){system("cls");printf("\n\n\n\n\n\n\n");printf("**************************************************************");printf("\n\t用户%s的个人信息\n", p->username);printf("**************************************************************");printf("\nusername: ");puts(p->username);printf("userscert: ");puts(p->scert);printf("bookcount: %d\n", p->bookcount);if (p->bookcount != 0){printf("booklist: ");for (int i = 0; i < p->bookcount; i++)puts(p->booklist[i]);}printf("输入0返回管理员页面!\n");scanf("%d", &n);if (n == 0)break;}}}void readuserfile(){struct userstruct *p;FILE *fp;p = head;fp = fopen("user", "ab+");while (fread(p,sizeof(struct userstruct),1,fp)){if (p->next != NULL){p = (struct userstruct *)malloc(sizeof(struct userstruct));end->next = p;end = p;end->next = NULL;}}}void readadminfile(){struct adminstruct *p;FILE *fp;p = adminhead;fp = fopen("admin", "ab+");while (fread(p, sizeof(struct adminstruct), 1, fp)){if (p->next != NULL){p = (struct adminstruct *)malloc(sizeof(struct adminstruct));adminend->next = p;adminend = p;adminend->next = NULL;}}}void readbookfile(){struct bookstruct *p;FILE *fp;p = bookhead;fp = fopen("book", "ab+");while (fread(p, sizeof(struct bookstruct), 1, fp)){if (p->next != NULL){p = (struct bookstruct *)malloc(sizeof(struct bookstruct));bookend->next = p;bookend = p;bookend->next = NULL;}}}void writefile(int flag){FILE *fp;struct userstruct *userp;struct adminstruct *adminp;struct bookstruct *bookp;userp = head;adminp = adminhead;bookp = bookhead;if (flag == 0){fp = fopen("user", "w");while (userp != NULL){fwrite(userp, sizeof(struct userstruct), 1, fp);userp = userp->next;}}else if (flag == 1){fp = fopen("admin", "w");while (adminp != NULL){fwrite(adminp, sizeof(struct adminstruct), 1, fp);adminp = adminp->next;}}else{fp = fopen("book", "w");while (bookp != NULL){fwrite(bookp, sizeof(struct bookstruct), 1, fp);bookp = bookp->next;}}fclose(fp);}void changuserbook(char *userbookname,char *bookname){struct userstruct *userp;userp = head;while (userp != NULL){for (int i = 0; i < userp->bookcount; i++){if (strcmp(userp->booklist[i], userbookname) == 0){strcpy(userp->booklist[i], bookname);}}userp = userp->next;}writefile(0);}void deleteuserbook(char *bookname){struct userstruct *userp;int flag = -1;userp = head;while (userp != NULL){flag = -1;for (int i = 0; i < userp->bookcount; i++){if (strcmp(userp->booklist[i], bookname) == 0){flag = i;break;}}if (flag != -1){for (int i = flag; i < userp->bookcount - 1; i++){strcpy(userp->booklist[i], userp->booklist[i + 1]);}userp->bookcount--;}userp = userp->next;}writefile(0);}
