func int main(){
  int a = 2;
  double b = 3.0;
  double c = a^b; 
  int d = a^a;
  double e = a^b;
  double f = b^a;
  double g = b^b;
  print(d);
  print(e);
  print(f);
  print(g);
  return 0;
}