#include <stdio.h> #include <stdlib.h> #include <string.h> // 图书结构体定义 typedef struct BookNode { char title[100]; // 书名 float price; // 价格 struct BookNode* next; // 下一节点指针 } BookNode; // 全局头结点 BookNode* head = NULL; // 创建新节点并初始化 BookNode* createNewBook(const char* title, float price) { BookNode* newNode = (BookNode*)malloc(sizeof(BookNode)); strncpy(newNode->title, title, sizeof(newNode->title)-1); newNode->price = price; newNode->next = NULL; return newNode; } // 增加一本书到链表开头 void addBook() { char title[100]; float price; printf("输入书名: "); scanf("%99s", title); // 输入时注意缓冲区溢出风险 printf("输入价格: "); scanf("%f", &price); BookNode* newBook = createNewBook(title, price); if (head == NULL) { // 空链表情况 head = newBook; } else { // 否则添加到列表前面 newBook->next = head; head = newBook; } printf("成功添加书籍!\n"); } // 删除指定标题的书籍 void removeBook(const char* title) { if (head == NULL) { printf("链表为空无法删除.\n"); return; } if (!strcmp(head->title, title)) { // 若首节点即为目标项，则直接移除 BookNode* temp = head; head = head->next; free(temp); printf("删除成功: %s\n", title); return; } // 找到需要删除的前驱节点 BookNode* current = head; while (current->next != NULL && strcmp(current->next->title, title)) current = current->next; if (current->next == NULL) { printf("未找到该书 (%s).\n", title); return; } BookNode* toRemove = current->next; current->next = toRemove->next; free(toRemove); printf("删除成功: %s\n", title); } // 显示所有书籍 void listBooks() { BookNode* temp = head; if (temp == NULL){ printf("无任何书籍记录.\n"); return; } printf("---------------------------\n"); while (temp != NULL) { printf("书名: %-20s | 价格: %.2f\n", temp->title, temp->price); temp = temp->next; } printf("---------------------------\n"); } // 主函数入口 int main(){ int choice; char inputTitle[100]; while(1){ // 循环菜单供用户选择操作 printf("\n=== 图书管理系统 ===\n"); printf("1. 添加书籍\n"); printf("2. 列出所有书籍\n"); printf("3. 删除书籍\n"); printf("4. 结束程序\n"); printf("请选择: "); scanf("%d",&choice); switch(choice){ case 1: addBook(); break; case 2: listBooks(); break; case 3: printf("请输入要删除的书名:"); scanf("%99s",inputTitle); removeBook(inputTitle); break; case 4: exit(EXIT_SUCCESS); // 正常结束程序 default: printf("错误选项，请重新选择.\n"); } } return 0; }