实验5-1 使用函数计算两个复数之积 (10 分)

#include<stdio.h> 

double result_real, result_imag;
void complex_prod(double x1, double y1, double x2, double y2);

int main(void)
{
    double imag1, imag2, real1, real2;

    scanf("%lf %lf", &real1, &imag1);
    scanf("%lf %lf", &real2, &imag2);
    complex_prod(real1, imag1, real2, imag2);
    printf("product of complex is (%f)+(%f)i\n", result_real, result_imag);

    system("pause");
    return 0;
}

/* 你的代码将被嵌在这里 */
void complex_prod(double x1, double y1, double x2, double y2) {
    result_real = x1 * x2 - y1 * y2;
    result_imag = x1 * y2 + x2 * y1;
}