C语言编写程序，计算两个复数的和、差、积、商。该结构体可以显示函数

好的，以下是用C语言编写计算两个复数的和、差、积、商的程序：

#include <stdio.h>

struct complex {
    float real;
    float imag;
};

struct complex add(struct complex num1, struct complex num2) {
    struct complex res;
    res.real = num1.real + num2.real;
    res.imag = num1.imag + num2.imag;
    return res;
}

struct complex sub(struct complex num1, struct complex num2) {
    struct complex res;
    res.real = num1.real - num2.real;
    res.imag = num1.imag - num2.imag;
    return res;
}

struct complex mul(struct complex num1, struct complex num2) {
    struct complex res;
    res.real = (num1.real * num2.real) - (num1.imag * num2.imag);
    res.imag = (num1.real * num2.imag) + (num1.imag * num2.real);
    return res;
}

struct complex div(struct complex num1, struct complex num2) {
    struct complex res;
    float den = num2.real * num2.real + num2.imag * num2.imag;
    res.real = (num1.real * num2.real + num1.imag * num2.imag) / den;
    res.imag = (num1.imag * num2.real - num1.real * num2.imag) / den;
    return res;
}

int main() {
    struct complex num1, num2, res;
    char op;

    printf("Enter the first complex number (a + bi): ");
    scanf("%f %f", &num1.real, &num1.imag);

    printf("Enter the second complex number (a + bi): ");
    scanf("%f %f", &num2.real, &num2.imag);

    printf("Enter operation (+, -, *, /): ");
    scanf(" %c", &op);

    switch (op) {
        case '+':
            res = add(num1, num2);
            printf("Result: %.2f + %.2fi\n", res.real, res.imag);
            break;
        case '-':
            res = sub(num1, num2);
            printf("Result: %.2f + %.2fi\n", res.real, res.imag);
            break;
        case '*':
            res = mul(num1, num2);
            printf("Result: %.2f + %.2fi\n", res.real, res.imag);
            break;
        case '/':
            res = div(num1, num2);
            printf("Result: %.2f + %.2fi\n", res.real, res.imag);
            break;
        default:
            printf("Invalid operation\n");
    }

    return 0;
}

这个程序使用了结构体来存储复数，然后分别定义了四个函数来计算和、差、积、商。用户可以输入两个复数和一个运算符，然后程序根据运算符调用相应的函数来计算结果，并输出。