func int main(){
  double a;
  int b;
  double c;
  a = -1.1;
  b = 2;
  c = a + b;
  print(c);
  c = a - b;
  print(c);
  c = a * b;
  print(c);
  c = a / b;
  print(c);
  return 0;
}
