#include <iostream>

using namespace std;

int main()
{
  int userNum;

  cout << "Enter one of the numbers 1, 2, or 3: ";
  cin >> userNum;

  // write a switch statement that will display the word 
  // for the number entered (i.e. display "one" if 1 entered)
  // if entered something other than 1, 2, or 3 then display 
  // an error message
  switch (userNum)
    {
    case 1:
      cout << "one" << endl;
      break;
    case 2:
      cout << "two" << endl;
      break;
    case 3:
      cout << "three" << endl;
      break;
    default:
      cout << "Error: must enter 1, 2 or 3" << endl;
    }  // end switch
  
  cout << "done." << endl << endl;

  return 0;
}  // end main