#include<iostream>

void addima (double x, double y, double x2, double y2, double * xrslt, double * yrslt ) {
  *xrslt = x + x2;
  *yrslt = y + y2;
}

void multima (double x, double y, double x2, double y2, double * xrslt, double * yrslt ) {
  *xrslt = x*x2 + x*y2;
  *yrslt = y*x2 + y*y2;
}

int main () {
  double x=2,y=3,x2=5,y2=1, rsltx, rslty;
  addima(x,y,x2,y2,&rsltx,&rslty);
  std::cout<<"(2+3i) +(5+i) = "<< rsltx <<" + " << rslty << "i"<<std::endl;
  multima(x,y,x2,y2,&rsltx,&rslty);
  std::cout<<"(2+3i)*(5+i) = "<< rsltx <<" + " << rslty << "i"<<std::endl;
  return 0;
}