#include <iostream.h>

const double INCHES_PER_FOOT = 12.0;

void explainProgram() {

  cout << "This program will convert a measurement" << endl
       << "in feet to inches." << endl;
}


double getFeet() {

  cout << "enter feet: ";
  double numFeet; 
  cin >> numFeet;
  
  while (numFeet < 0.0) {
    cout << "must be positive, please re-enter: ";
    cin >> numFeet;
  }
  return numFeet;
}


double convertFeetToInches(double measurementInFeet) {

  double measurementInInches = measurementInFeet * INCHES_PER_FOOT; 
  return measurementInInches; 
}


void outputResults(double localFeet, double localInches) {

  cout << "the measurement in feet is: " << localFeet << endl;
  cout << "the measurement in inches is: " << localInches << endl;
  cout << "Bye!" << endl; 
}


int main() {

  //explain program to user
  explainProgram();


  //get measurement in feet
  double measurementInFeet = getFeet();

  //calculate the measurement in inches
  double measurementInInches = convertFeetToInches(measurementInFeet); 

  //output both measurements
  outputResults(measurementInFeet, measurementInInches); 

}