/* func2.cpp
 */

#include <iostream>

using namespace std;

   // Prototypes
int CharToDigit( char ch );
int IsEven( int n );

int main()
{
  char c;
  int result;  // numeric value of c

  cout << "Enter a digit (char): " << flush;
  cin >> c;
  cout << "c:     " << c << endl;
  result = CharToDigit( c );
  cout << "numeric value: " << result << endl;

  if( IsEven(result) )
    cout << "even" << endl;
  else 
    cout << "odd" << endl;

  return 0;
}

int CharToDigit( char ch )
{
   int n;     // result

   n = ch - '0';

   return n;
}


int IsEven( int n )
{
  int retVal = 1;  // assume true

  if( n % 2 )  // odd
  {
    retVal = 0;
  }

  /* version 2
  int result;
  result = n % 2;
  if( result )  // odd
  {
    retVal = 0;
  }
  */

  /* version 1
  if( result )  // odd
    retVal = 0;
  else
    retVal = 1;
   */

  return retVal;
}