Boolean of C Program

#include 

typedef int Bool;

const Bool TRUE = 1;

const Bool FALSE = 0;

Bool even (int);

Bool odd (int);

int readPosNum();

void testOneNum();

void panic();

void main () 

{

  int i;

  char c;

  Bool more = TRUE;

  while (cin && more)

 {

    testOneNum();

    cout << "More? [y = Yes, anything else No]: ";

    cin >> c;

    if (cin) more = (c == 'y');

  }

}

void testOneNum () 

{

  int i;

  i = readPosNum();

  if (even(i)) cout << "The number " << i << " is even." << endl;

  else cout << "The number " << i << " is odd." << endl;

}

int readPosNum () 

{

  int j;

  cout << "Enter a number >= 0: ";

  cin >> j;

  while (cin && j < 0) 

{

    cout << "Unacceptable, reenter: ";cin >> j;

  }

  if (cin) return(j);

  else panic();

}

Bool even (int i)

 {

  if (i == 0) return(TRUE);

  else return(odd(i-1));

}

Bool odd (int i) 

{

  if (i == 0) return(FALSE);

  else return(even(i-1));

}

void panic() 

{

  cout << "Disaster! Exiting ..." << endl;

  exit(-1);

}