使用C语言帮我写一个奶茶店自动管理的程序

好的，下面是一个简单的奶茶店自动管理程序的示例代码：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define MAX_SIZE 100

typedef struct {
    int id;
    char name[20];
    double price;
    int stock;
} Item;

typedef struct {
    Item items[MAX_SIZE];
    int count;
} Menu;

void init_menu(Menu *menu);
void show_menu(Menu *menu);
void add_item(Menu *menu);
void remove_item(Menu *menu);
void update_stock(Menu *menu);
void place_order(Menu *menu);

int main() {
    Menu menu;
    init_menu(&menu);
    int choice;
    do {
        printf("\n====== Welcome to Boba Shop ======\n");
        printf("1. Show menu\n");
        printf("2. Add item\n");
        printf("3. Remove item\n");
        printf("4. Update stock\n");
        printf("5. Place order\n");
        printf("6. Exit\n");
        printf("Please enter your choice: ");
        scanf("%d", &choice);
        switch (choice) {
            case 1:
                show_menu(&menu);
                break;
            case 2:
                add_item(&menu);
                break;
            case 3:
                remove_item(&menu);
                break;
            case 4:
                update_stock(&menu);
                break;
            case 5:
                place_order(&menu);
                break;
            case 6:
                printf("Thanks for using Boba Shop!\n");
                break;
            default:
                printf("Invalid choice!\n");
        }
    } while (choice != 6);
    return 0;
}

void init_menu(Menu *menu) {
    menu->count = 3;
    menu->items[0].id = 1;
    strcpy(menu->items[0].name, "Classic Milk Tea");
    menu->items[0].price = 3.5;
    menu->items[0].stock = 10;
    menu->items[1].id = 2;
    strcpy(menu->items[1].name, "Brown Sugar Boba Milk");
    menu->items[1].price = 4.5;
    menu->items[1].stock = 8;
    menu->items[2].id = 3;
    strcpy(menu->items[2].name, "Taro Milk Tea");
    menu->items[2].price = 4.0;
    menu->items[2].stock = 5;
}

void show_menu(Menu *menu) {
    printf("\n====== Menu ======\n");
    printf("%-4s%-20s%-10s%-10s\n", "ID", "Name", "Price", "Stock");
    for (int i = 0; i < menu->count; i++) {
        printf("%-4d%-20s%-10.2f%-10d\n", menu->items[i].id, menu->items[i].name, menu->items[i].price, menu->items[i].stock);
    }
}

void add_item(Menu *menu) {
    if (menu->count == MAX_SIZE) {
        printf("Menu is full!\n");
        return;
    }
    Item item;
    printf("Please enter item name: ");
    scanf("%s", item.name);
    printf("Please enter item price: ");
    scanf("%lf", &item.price);
    printf("Please enter item stock: ");
    scanf("%d", &item.stock);
    item.id = menu->items[menu->count - 1].id + 1;
    menu->items[menu->count++] = item;
    printf("Item added successfully!\n");
}

void remove_item(Menu *menu) {
    int id;
    printf("Please enter item ID: ");
    scanf("%d", &id);
    int index = -1;
    for (int i = 0; i < menu->count; i++) {
        if (menu->items[i].id == id) {
            index = i;
            break;
        }
    }
    if (index == -1) {
        printf("Item not found!\n");
        return;
    }
    for (int i = index; i < menu->count - 1; i++) {
        menu->items[i] = menu->items[i + 1];
    }
    menu->count--;
    printf("Item removed successfully!\n");
}

void update_stock(Menu *menu) {
    int id, stock;
    printf("Please enter item ID: ");
    scanf("%d", &id);
    int index = -1;
    for (int i = 0; i < menu->count; i++) {
        if (menu->items[i].id == id) {
            index = i;
            break;
        }
    }
    if (index == -1) {
        printf("Item not found!\n");
        return;
    }
    printf("Please enter new stock: ");
    scanf("%d", &stock);
    menu->items[index].stock = stock;
    printf("Stock updated successfully!\n");
}

void place_order(Menu *menu) {
    double total = 0.0;
    int id, quantity;
    printf("\n====== Place Order ======\n");
    do {
        printf("Please enter item ID (0 to end): ");
        scanf("%d", &id);
        if (id == 0) {
            break;
        }
        int index = -1;
        for (int i = 0; i < menu->count; i++) {
            if (menu->items[i].id == id) {
                index = i;
                break;
            }
        }
        if (index == -1) {
            printf("Item not found!\n");
            continue;
        }
        printf("Please enter quantity: ");
        scanf("%d", &quantity);
        if (quantity > menu->items[index].stock) {
            printf("Insufficient stock!\n");
            continue;
        }
        total += menu->items[index].price * quantity;
        menu->items[index].stock -= quantity;
    } while (1);
    printf("Total: %.2f\n", total);
}

这个程序的主要功能包括：

1. 显示菜单
2. 添加菜单项
3. 删除菜单项
4. 更新库存
5. 下订单

你可以根据自己的实际需求进行修改和扩展。