如何在C中将函数链接到菜单

#include <stdio.h>

// 函数声明
void addNumbers();
void subtractNumbers();
void multiplyNumbers();
void divideNumbers();

int main() {
    int choice;

    while (1) {
        // 显示菜单选项
        printf("菜单选项：\n");
        printf("1. 相加\n");
        printf("2. 相减\n");
        printf("3. 相乘\n");
        printf("4. 相除\n");
        printf("0. 退出\n");
        printf("请选择一个选项：");

        // 获取用户选择
        scanf("%d", &choice);

        // 根据选择执行相应的函数
        switch (choice) {
            case 1:
                addNumbers();
                break;
            case 2:
                subtractNumbers();
                break;
            case 3:
                multiplyNumbers();
                break;
            case 4:
                divideNumbers();
                break;
            case 0:
                printf("程序已退出。\n");
                return 0;
            default:
                printf("无效的选项，请重新选择。\n");
        }
    }

    return 0;
}

// 函数定义
void addNumbers() {
    int num1, num2, sum;
    printf("请输入两个数字：");
    scanf("%d %d", &num1, &num2);
    sum = num1 + num2;
    printf("两个数字的和为：%d\n", sum);
}

void subtractNumbers() {
    int num1, num2, diff;
    printf("请输入两个数字：");
    scanf("%d %d", &num1, &num2);
    diff = num1 - num2;
    printf("两个数字的差为：%d\n", diff);
}

void multiplyNumbers() {
    int num1, num2, product;
    printf("请输入两个数字：");
    scanf("%d %d", &num1, &num2);
    product = num1 * num2;
    printf("两个数字的积为：%d\n", product);
}

void divideNumbers() {
    int num1, num2;
    float quotient;
    printf("请输入两个数字：");
    scanf("%d %d", &num1, &num2);
    if (num2 != 0) {
        quotient = (float)num1 / num2;
        printf("两个数字的商为：%f\n", quotient);
    } else {
        printf("除数不能为0。\n");
    }
}