#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <windows.h>
#define MAX_RECIPES 100
#define NAME_LEN 100
#define CATEGORY_LEN 50
#define INGREDIENTS_LEN 200
#define STEPS_LEN 500
#define LIKED_BY_LEN 100
// 定义菜谱结构体
typedef struct {
char name[NAME_LEN];
char category[CATEGORY_LEN];
char ingredients[INGREDIENTS_LEN];
char steps[STEPS_LEN];
char liked_by[LIKED_BY_LEN];
} Recipe;
Recipe recipes[MAX_RECIPES]; // 存储所有菜谱
int recipe_count = 0; // 当前菜谱数量
// 函数声明
void add_recipe();
void edit_recipe();
void delete_recipe();
void search_recipes();
void view_all_recipes();
void main_menu(); // <<< 添加 main_menu 的函数声明
// 程序入口
int main() {
SetConsoleOutputCP(936); // 设置控制台输出为 GBK
SetConsoleCP(936); // 设置控制台输入为 GBK
main_menu(); // 调用主菜单
return 0;
}
// 主菜单函数定义
void main_menu() {
int choice;
while (1) {
printf("\n--- 菜谱管理系统 ---\n");
printf("1. 添加菜谱\n");
printf("2. 修改菜谱\n");
printf("3. 删除菜谱\n");
printf("4. 查询菜谱\n");
printf("5. 查看全部菜谱\n");
printf("6. 退出系统\n");
printf("请选择操作: ");
scanf("%d", &choice);
getchar(); // 清除换行符
switch (choice) {
case 1:
add_recipe();
break;
case 2:
edit_recipe();
break;
case 3:
delete_recipe();
break;
case 4:
search_recipes();
break;
case 5:
view_all_recipes();
break;
case 6:
exit(0);
default:
printf("无效选择，请重新输入。\n");
}
}
}
// 添加菜谱
void add_recipe() {
if (recipe_count >= MAX_RECIPES) {
printf("菜谱已满，无法添加更多。\n");
return;
}
Recipe *r = &recipes[recipe_count++];
printf("请输入菜名: ");
fgets(r->name, NAME_LEN, stdin);
r->name[strcspn(r->name, "\n")] = '\0';
printf("请输入分类: ");
fgets(r->category, CATEGORY_LEN, stdin);
r->category[strcspn(r->category, "\n")] = '\0';
printf("请输入食材: ");
fgets(r->ingredients, INGREDIENTS_LEN, stdin);
r->ingredients[strcspn(r->ingredients, "\n")] = '\0';
printf("请输入制作步骤: ");
fgets(r->steps, STEPS_LEN, stdin);
r->steps[strcspn(r->steps, "\n")] = '\0';
printf("请输入谁喜欢吃: ");
fgets(r->liked_by, LIKED_BY_LEN, stdin);
r->liked_by[strcspn(r->liked_by, "\n")] = '\0';
printf("菜谱添加成功！\n");
}
// 修改菜谱
void edit_recipe() {
char name[NAME_LEN];
printf("请输入要修改的菜名: ");
fgets(name, NAME_LEN, stdin);
name[strcspn(name, "\n")] = '\0';
for (int i = 0; i < recipe_count; i++) {
if (strcmp(recipes[i].name, name) == 0) {
int field;
printf("请选择要修改的字段:\n");
printf("1. 分类\n2. 食材\n3. 制作步骤\n4. 谁喜欢吃\n");
scanf("%d", &field);
getchar(); // 清除换行符
switch (field) {
case 1:
printf("请输入新分类: ");
fgets(recipes[i].category, CATEGORY_LEN, stdin);
recipes[i].category[strcspn(recipes[i].category, "\n")] = '\0';
break;
case 2:
printf("请输入新食材: ");
fgets(recipes[i].ingredients, INGREDIENTS_LEN, stdin);
recipes[i].ingredients[strcspn(recipes[i].ingredients, "\n")] = '\0';
break;
case 3:
printf("请输入新制作步骤: ");
fgets(recipes[i].steps, STEPS_LEN, stdin);
recipes[i].steps[strcspn(recipes[i].steps, "\n")] = '\0';
break;
case 4:
printf("请输入新的喜好者: ");
fgets(recipes[i].liked_by, LIKED_BY_LEN, stdin);
recipes[i].liked_by[strcspn(recipes[i].liked_by, "\n")] = '\0';
break;
default:
printf("无效选择。\n");
}
printf("菜谱信息已更新。\n");
return;
}
}
printf("未找到该菜名的菜谱。\n");
}
// 删除菜谱
void delete_recipe() {
char name[NAME_LEN];
printf("请输入要删除的菜名: ");
fgets(name, NAME_LEN, stdin);
name[strcspn(name, "\n")] = '\0';
for (int i = 0; i < recipe_count; i++) {
if (strcmp(recipes[i].name, name) == 0) {
for (int j = i; j < recipe_count - 1; j++) {
recipes[j] = recipes[j + 1];
}
recipe_count--;
printf("菜谱删除成功。\n");
return;
}
}
printf("未找到该菜名的菜谱。\n");
}
// 查询菜谱
void search_recipes() {
int choice;
printf("请选择查询方式:\n");
printf("1. 按菜名\n2. 按分类\n3. 按食材\n4. 按谁喜欢吃\n");
scanf("%d", &choice);
getchar(); // 清除换行符
char keyword[NAME_LEN];
printf("请输入关键词: ");
fgets(keyword, NAME_LEN, stdin);
keyword[strcspn(keyword, "\n")] = '\0';
int found = 0;
for (int i = 0; i < recipe_count; i++) {
switch (choice) {
case 1:
if (strstr(recipes[i].name, keyword)) {
printf("菜名: %s\n分类: %s\n食材: %s\n制作步骤: %s\n谁喜欢吃: %s\n\n",
recipes[i].name, recipes[i].category,
recipes[i].ingredients, recipes[i].steps,
recipes[i].liked_by);
found = 1;
}
break;
case 2:
if (strstr(recipes[i].category, keyword)) {
printf("菜名: %s\n分类: %s\n食材: %s\n制作步骤: %s\n谁喜欢吃: %s\n\n",
recipes[i].name, recipes[i].category,
recipes[i].ingredients, recipes[i].steps,
recipes[i].liked_by);
found = 1;
}
break;
case 3:
if (strstr(recipes[i].ingredients, keyword)) {
printf("菜名: %s\n分类: %s\n食材: %s\n制作步骤: %s\n谁喜欢吃: %s\n\n",
recipes[i].name, recipes[i].category,
recipes[i].ingredients, recipes[i].steps,
recipes[i].liked_by);
found = 1;
}
break;
case 4:
if (strstr(recipes[i].liked_by, keyword)) {
printf("菜名: %s\n分类: %s\n食材: %s\n制作步骤: %s\n谁喜欢吃: %s\n\n",
recipes[i].name, recipes[i].category,
recipes[i].ingredients, recipes[i].steps,
recipes[i].liked_by);
found = 1;
}
break;
}
}
if (!found)
printf("未找到匹配的菜谱。\n");
}
// 查看全部菜谱
void view_all_recipes() {
if (recipe_count == 0) {
printf("当前没有菜谱。\n");
return;
}
for (int i = 0; i < recipe_count; i++) {
printf("菜名: %s\n分类: %s\n食材: %s\n制作步骤: %s\n谁喜欢吃: %s\n\n",
recipes[i].name, recipes[i].category,
recipes[i].ingredients, recipes[i].steps,
recipes[i].liked_by);
}
}
详细解释这段代码所用的库和函数，给出每一行代码的详细解释
本文详细阐述了fgets函数在处理输入字符串换行符时的注意事项，特别是在子进程间通信场景下如何正确处理换行符以避免错误，通过实例演示了如何在父子进程中安全地传递包含换行符的字符串。
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