如何用c语言写复数的基本运算

复数的基本运算可以通过定义结构体来实现，结构体中包含实部和虚部两个成员变量，具体代码如下：

#include <stdio.h>

typedef struct {
    double real;    // 实部
    double imag;    // 虚部
} Complex;

// 复数加法
Complex add(Complex a, Complex b) {
    Complex c;
    c.real = a.real + b.real;
    c.imag = a.imag + b.imag;
    return c;
}

// 复数减法
Complex sub(Complex a, Complex b) {
    Complex c;
    c.real = a.real - b.real;
    c.imag = a.imag - b.imag;
    return c;
}

// 复数乘法
Complex mul(Complex a, Complex b) {
    Complex c;
    c.real = a.real * b.real - a.imag * b.imag;
    c.imag = a.real * b.imag + a.imag * b.real;
    return c;
}

// 复数除法
Complex div(Complex a, Complex b) {
    Complex c;
    double denominator = b.real * b.real + b.imag * b.imag;
    c.real = (a.real * b.real + a.imag * b.imag) / denominator;
    c.imag = (a.imag * b.real - a.real * b.imag) / denominator;
    return c;
}

int main() {
    Complex a = {1., 2.};
    Complex b = {3., 4.};
    Complex c;

    c = add(a, b);
    printf("(%g + %gi) + (%g + %gi) = %g + %gi\n", a.real, a.imag, b.real, b.imag, c.real, c.imag);

    c = sub(a, b);
    printf("(%g + %gi) - (%g + %gi) = %g + %gi\n", a.real, a.imag, b.real, b.imag, c.real, c.imag);

    c = mul(a, b);
    printf("(%g + %gi) * (%g + %gi) = %g + %gi\n", a.real, a.imag, b.real, b.imag, c.real, c.imag);

    c = div(a, b);
    printf("(%g + %gi) / (%g + %gi) = %g + %gi\n", a.real, a.imag, b.real, b.imag, c.real, c.imag);

    return ;
}