#include <iostream>
using namespace std;

double rdcm();
double cm2inches(double cm);
void outputInches(double inches);

int main()
{
  double cm, inches;
  while(1){
    cm = rdcm();
    if ( cm <= 0 ) break;
    inches = cm2inches(cm);
    outputInches(inches);
  }
  return 0;
}

#ifdef TEST
double rdcm(){
  double cm;
  cout << "Gime a number in cm ";
  cin >> cm;
  return cm;
}

double cm2inches(double cm){
  return 3.0;
}

void outputInches(double inches){
  cout << "outputInches called with value " << inches << endl;
}
#endif