复数乘法是什么时候学习的,复数乘法计算公式

代码实现： #include<stdio.h>#include<math.h>int main(){double a1, b1, a2, b2, a, b, r1, p1, r2, p2;scanf("%lf %lf %lf %lf", &r1, &p1, &r2, &p2);a1 = r1 * cos(p1); b1 = r1 * sin(p1);a2 = r2 * cos(p2); b2 = r2 * sin(p2);a = a1 * a2 - b1 * b2;b = a1 * b2 + b1 * a2;if (fabs(a) < 0.01)a = 0;if (fabs(b) < 0.01)b = 0;if (b < 0)printf("%.2f-%.2fi", a, -b);else printf("%.2f+%.2fi", a, b);return 0;}