/* This program uses a while loop to do a countdown from the number
   of seconds before blastoff.  If the number of seconds is negative, 
   the program does nothing. */

#include<iostream.h>

void main() {

  int sec;            // Seconds left in countdown.

  cout << "How many seconds left to count down? ";
  cin >> sec;

  while (sec >= 1){
    cout << sec << " ";
    sec--;
  }
  if (sec==0) cout << "BLASTOFF!\n";
}