c++|(C++)使用链表编写图书管理系统开发语言|链表

一、程序实现功能：
1.录入书籍：将书籍录入图书管理系统
2.浏览书籍：查看图书管理系统里的所有书籍
3.借阅书籍：书籍存在可以借阅，库存-1，书的库存不足则无法借阅
4.归还书籍：库存+1，如果该书不是图书馆里的书籍，则无法录入
5.删除书籍：以书名为基础从图书管理系统中删除该书籍
6.查找书籍：按书名查找书籍，显示书籍的基本信息
7.排序书籍：按价格将书籍排序(降序)

二、要求
使用函数、指针和链表编写。
三、程序功能图

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四、具体函数

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【c++|(C++)使用链表编写图书管理系统】五、程序代码

#include #include #include struct bookinfo { char name[20]; //书名 char author[10]; //作者 char date[20]; //出版日期 float price; //价格 int num; //数量 }; struct Node { struct bookinfo data; struct Node* next; }; /*全局链表*/ struct Node* list = NULL; /*创建表头*/ struct Node* createhead() { /*动态内存申请*/ struct Node* headNode = (struct Node*)malloc(sizeof(struct Node)); headNode->next = NULL; return headNode; }/*创建节点*/ struct Node* createNode(struct bookinfo data) { struct Node* newNode = (struct Node*)malloc(sizeof(struct Node)); newNode->data = https://www.it610.com/article/data; newNode->next = NULL; return newNode; }void printList(); void display_menu(); void savebookfile(); void insertbook(); void readbookfile(); void deletebook(); struct Node* searchbook(); void sortbook(); void selectkey(); /*打印链表*/ void printList(struct Node* headNode) { struct Node* Bmove = headNode->next; printf("书名\t作者\t出版日期\t价格\t库存\n"); while(Bmove != NULL) { printf("%s\t%s\t%s\t%.1f\t%d\n",Bmove->data.name,Bmove->data.author,Bmove->data.date,Bmove->data.price,Bmove->data.num); Bmove = Bmove->next; }} /*菜单登录界面*/ void display_menu() { char str[100]; FILE *fp; char *txt; fp = fopen("menu.txt","r"); txt = fgets(str,100,fp); while(txt != NULL) { printf("%s",str); txt = fgets(str,100,fp); } fclose(fp); } /*将信息存到文件中*/ void savebookfile(const char* filename,struct Node* headNode) { FILE* fp = fopen(filename,"w"); struct Node* Bmove = headNode->next; while(Bmove != NULL) { fprintf(fp,"%s\t%s\t%s\t%.1f\t%d\n",Bmove->data.name,Bmove->data.author,Bmove->data.date,Bmove->data.price,Bmove->data.num); Bmove = Bmove->next; } fclose(fp); }/*录入书籍*/ void insertbook(struct Node* headNode,struct bookinfo data) { struct Node* newNode = createNode(data); newNode->next = headNode->next; headNode->next = newNode; }/*读取文件*/ void readbookfile(const char* filename, struct Node* headNode) { FILE* fp = fopen(filename,"r"); if(fp == NULL) { fp = fopen(filename,"w+"); } struct bookinfo tempinfo; while(fscanf(fp, "%s\t%s\t%s\t%.1f\t%d\n",tempinfo.name,&tempinfo.author,&tempinfo.date,&tempinfo.price,&tempinfo.num ) != EOF) { insertbook(list,tempinfo); } fclose(fp); }/*删除书籍*/ void deletebook(struct Node* headNode,char *bookname) { struct Node* leftNode = headNode; struct Node* rightNode = headNode->next; while(rightNode != NULL && strcmp(rightNode->data.name,bookname)) { leftNode = rightNode; rightNode = leftNode->next; } if(leftNode == NULL) { return; } else { printf("删除书籍成功！\n"); leftNode->next = rightNode->next; free(rightNode); rightNode = NULL; } }/*查找书籍*/ struct Node* searchbook(struct Node* headNode, char* bookname) { struct Node* rightNode = headNode->next; while (rightNode != NULL && strcmp(rightNode->data.name, bookname)) { rightNode = rightNode->next; } return rightNode; } /*排序书籍*/ void sortbook(struct Node* headNode) { for(struct Node* i = headNode->next; i != NULL; i = i->next) { for(struct Node* j = headNode->next; j->next != NULL; j = j->next) { /*排序书籍(按价格降序)*/ if (j->data.price < j->next->data.price) { /*交换值*/ struct bookinfo tempdata = https://www.it610.com/article/j->data; j->data = https://www.it610.com/article/j->next->data; j->next->data = https://www.it610.com/article/tempdata; } } } /*排序后查看效果*/ printList(headNode); } /*交互界面*/ void selectkey() { int userkey = 0; struct bookinfo tempbook; //生成一个临时的变量存储书籍信息 struct Node* searchname = NULL; //生成一个临时变量存储查找的书名 struct Node* borrowbook = NULL; //生成一个临时变量存储要借阅的书名 struct Node* returnbook = NULL; //生成一个临时变量存储要归还的书名 scanf("%d",&userkey); switch(userkey) { case 1: printf("[ 录入书籍 ]\n"); printf("输入书籍的信息(name,author,date,price,num):"); scanf("%s%s%s%f%d",tempbook.name,&tempbook.author,&tempbook.date,&tempbook.price,&tempbook.num); insertbook(list,tempbook); /*把书籍信息保存到booksinfo文本文件里*/ savebookfile("bookinfo.txt",list); break; case 2: printf("[ 浏览书籍 ]\n"); printList(list); break; case 3: printf("[ 借阅书籍 ]\n"); /*书籍存在可以借阅，库存-1，书的库存不足则无法借阅*/ printf("请输入要借阅的书名："); scanf("%s",tempbook.name); borrowbook = searchbook(list,tempbook.name); if(borrowbook == NULL) { printf("不存在该书，无法借阅！\n"); } else { if(borrowbook->data.num > 0) { borrowbook->data.num--; printf("借阅成功！\n"); printList(list); } else { printf("当前书籍库存不足,借阅失败！\n"); } } break; case 4: printf("[ 归还书籍 ]\n"); //库存+1 printf("请输入要归还的书名："); scanf("%s",tempbook.name); returnbook = searchbook(list,tempbook.name); if(returnbook == NULL) { printf("该书不是图书馆里的书籍！\n"); } else { returnbook->data.num++; printf("书籍归还成功！\n"); printList(list); } break; case 5: printf("[ 删除书籍 ]\n"); printf("请输入要删除的书名："); scanf("%s",tempbook.name); deletebook(list,tempbook.name); /*按书名删除书籍*/ printList(list); break; case 6: printf("[ 查找书籍 ]\n"); printf("请输入要查询的书名："); scanf("%s",tempbook.name); searchname = searchbook(list,tempbook.name); if(searchname == NULL) { printf("不存在该书，请加购录入！\n"); } else { /*输出该书的信息*/ printf("书名\t作者\t出版日期\t价格\t库存\n"); printf("%s\t%s\t%s\t%.1f\t%d\n",searchname->data.name,searchname->data.author,searchname->data.date,searchname->data.price,searchname->data.num); } break; case 7: printf("[ 排序书籍 ]\n"); /*按价格排序(降序)*/ sortbook(list); break; case 8: printf("[ 退出系统 ]\n"); printf("退出成功\n"); system("pause"); exit(0); /*关闭整个程序*/ break; default: printf("[ 错误 ]\n"); break; } } /*主界面*/ int main() { list = createhead(); readbookfile("bookinfo.txt",list); while(1) { display_menu(); selectkey(); system("pause"); system("cls"); } system("pause"); return 0; }

六、效果
1.录入书籍