/* */
#include <iostream> 
#include <cstdlib>
#include <cmath>
using namespace std;
double area (double x, double y); // protypo
double hypotenuse (double x, double y); // protypo
int main(int argc, char *argv[])
{ double x,y, emvadon, hypot;
  cout<<"Dose 2 pragmatikous x,y: ";
  cin>> x >> y;
  while ((x>0) && (y>0)){
     emvadon=area(x,y);
     hypot=hypotenuse(x,y);
     cout<<"To emvadon einai: "<<emvadon<<endl;
     cout<<"Oi plevres einai: "<<x<<" "<<y<<" "<<hypot<<endl;
     cout<<"Dose 2 pragmatikous x,y: ";
     cin>> x >> y;
  }
  system("PAUSE");
  return 0;
}

double area (double x, double y)
{
  return (x*y)/2;
}
double hypotenuse (double x, double y)
{
  return sqrt(x*x+y*y);
}