如图
#include <stdio.h>
int main()
{
double xa,ya,xb,yb;
while(scanf("%lf%lf%lf%lf",&xa,&ya,&xb,&yb)==4)
printf("%.2lf %.2lfi\n",xa+xb,ya+yb);
}
return 0;
代码:
#include <stdio.h>
float r1,i1,r2,i2;
scanf("%f %f",&r1,&i1);
scanf("%f %f",&r2,&i2);
printf("%.2f %.2fi\n",
r1+r2,i1+i2);
运行截图: