大学C语言课程设计——图书管理系统(C语言版本)
必不可缺的头文件:
#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <iostream>
#include <list>
using namespace std;
源码分享:
#define _CRT_SECURE_NO_WARNINGS #include <stdio.h> #include <stdlib.h> #include <string.h> #include <iostream> #include <list> using namespace std; //3.数据的设计? //3.1 程序用什么东西处理数据---->容器--->链表 //3.2 数据的结构 ---->图书的信息 struct bookInfo { char name[20]; //书名 float price; //书籍的价格 int num; //书的数量 }; struct Node { struct bookInfo data; struct Node* next; }; struct Node* listBook = NULL; //创建表头: 表头就是一个结构体变量 //另一个部分:用户信息 struct student { char name[20]; char tel[20]; int curNum; struct bookInfo userBook[3]; }; list<student> myList; struct Node* createHead() { //动态内存申请 struct Node* headNode = (struct Node*)malloc(sizeof(struct Node)); //变量的基本规则>? 使用前必须初始化 headNode->next = NULL; return headNode; } //创建节点: 为插入做准备 //把用户的数据变为结构体变量 struct Node* createNode(struct bookInfo data) { struct Node* newNode = (struct Node*)malloc(sizeof(struct Node)); newNode->data = data; newNode->next = NULL; return newNode; } //插入:只需要一种插入方式 void insertNodeByHead(struct Node* headNode, struct bookInfo data) { struct Node* newNode = createNode(data); //必须先连接后断开 newNode->next = headNode->next; headNode->next = newNode; } //指定删除 //posLeftNode->next=posNode->next; //free(posNode); void deleteNodeByName(struct Node* headNode, char *bookName) { struct Node* posLeftNode = headNode; struct Node* posNode = headNode->next; //书籍名字是字符串,字符串比较函数 while (posNode != NULL && strcmp(posNode->data.name,bookName)) { posLeftNode = posNode; posNode = posLeftNode->next; } //讨论查找的结果 if (posNode == NULL) return; else { printf("删除成功!\n"); posLeftNode->next = posNode->next; free(posNode); posNode = NULL; } } struct Node* searchByName(struct Node* headNode, char* bookName) { struct Node* posNode = headNode->next; while (posNode != NULL && strcmp(posNode->data.name, bookName)) { posNode = posNode->next; } return posNode; } void printlistBook(struct Node* headNode) { struct Node* pMove = headNode->next; printf("书名\t价格\t数量\n"); while (pMove!=NULL) { //剥洋葱 printf("%s\t%.1f\t%d\n", pMove->data.name, pMove->data.price, pMove->data.num); pMove = pMove->next; } } //1.写界面--->菜单--->模块 void makeMenu() { printf("---------------------------------------\n"); printf(" xxoo图书管理系统\n"); printf("\t0.退出系统\n"); printf("\t1.登记书籍\n"); printf("\t2.浏览书籍\n"); printf("\t3.借阅书籍\n"); printf("\t4.归还书籍\n"); printf("\t5.书籍排序\n"); printf("\t6.删除书籍\n"); printf("\t7.查找书籍\n"); printf("---------------------------------------\n"); printf("请输入(0~7):"); } //直接文件操作? //写操作 void saveInfoToFile(const char* fileName, struct Node* headNode) { FILE* fp = fopen(fileName, "w"); struct Node* pMove = headNode->next; while (pMove != NULL) { fprintf(fp, "%s\t%.1f\t%d\n", pMove->data.name, pMove->data.price, pMove->data.num); pMove = pMove->next; } fclose(fp); } //文件读操作 void readInfoFromFile(const char* fileName, struct Node* headNode) { FILE* fp = fopen(fileName, "r"); //第一次打开文件肯定不存在 if (fp == NULL) { //不存在就创建出来这个文件 fp = fopen(fileName, "w+"); } struct bookInfo tempData; while (fscanf(fp, "%s\t%f\t%d\n", tempData.name, &tempData.price, &tempData.num) != EOF) { insertNodeByHead(listBook, tempData); } fclose(fp); } //算法是一种思想 void bubbleSortlistBook(struct Node* headNode) { for (struct Node* p = headNode->next; p != NULL; p = p->next) { for (struct Node* q = headNode->next; q->next != NULL; q = q->next) { if (q->data.price > q->next->data.price) { //交换值 struct bookInfo tempData = q->data; q->data = q->next->data; q->next->data = tempData; } } } printlistBook(headNode); } //2.做交互 void keyDown() { int userKey = 0; struct bookInfo tempBook; //产生一个临时的变量存储书籍信息 struct Node* result = NULL; scanf("%d", &userKey); switch (userKey) { case 0: printf("【 退出 】\n"); printf("退出成功\n"); system("pause"); exit(0); //关闭掉整个程序 break; case 1: printf("【 登记 】\n"); printf("输入书籍的信息(name,price,num):"); scanf("%s%f%d", tempBook.name, &tempBook.price, &tempBook.num); insertNodeByHead(listBook, tempBook); saveInfoToFile("bookinfo.txt", listBook); break; case 2: printf("【 浏览 】\n"); printlistBook(listBook); break; case 3: printf("【 借阅 】\n"); //书籍存在可以借阅 ,书籍的总数量-1 不存在借阅失败 printf("请输入借阅的书名:"); scanf("%s", tempBook.name); result = searchByName(listBook, tempBook.name); if (result==NULL) { printf("没有相关书籍无法借阅!\n"); } else { if (result->data.num > 0) { result->data.num--; printf("借阅成功!\n"); } else { printf("当前书籍无库存在,借阅失败!\n"); } } break; case 4: printf("【 归还 】\n"); //当前书籍的数量+1 printf("请输入归还的书名:"); scanf("%s", tempBook.name); result = searchByName(listBook, tempBook.name); if (result == NULL) { printf("该书来源非法!\n"); } else { result->data.num++; printf("书籍归还成功!\n"); } break; case 5: printf("【 排序 】\n"); bubbleSortlistBook(listBook); break; case 6: printf("【 删除 】\n"); printf("请输入删除书名:"); scanf("%s", tempBook.name); deleteNodeByName(listBook, tempBook.name); saveInfoToFile("bookinfo.txt", listBook); break; case 7: printf("【 查找 】\n"); printf("请输入要查询的书名:"); scanf("%s", tempBook.name); result = searchByName(listBook, tempBook.name); if (result == NULL) { printf("未找到相关信息!\n"); } else { printf("书名\t价格\t数量\n"); printf("%s\t%.1f\t%d\n", result->data.name, result->data.price, result->data.num); } break; default: printf("【 error 】\n"); break; } } //easyx inputBox //自己封装一个Edit int main() { listBook= createHead(); readInfoFromFile("bookinfo.txt", listBook); while (1) { makeMenu(); keyDown(); system("pause"); system("cls"); } system("pause"); return 0; }
简单效果展示:
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