// Count Down.C
// (c) Burt Rosenberg 1996
// This program demonstrates recursion

#include <iostream.h>

void countDown(int j)
{
   if (j == 0)
   {
      cout << "BOOM!" << endl;
   }
   else
   {
      cout << j << endl;
      countDown( j-1 );
   }
}
void main()
{
   int count ;

   // get and verify input
   cout << "Enter count: " ;
   cin >> count ;
   if ( count <= 0 ) 
   {
      cout << "Count must be positive." << endl ;
      return ;
   }

   countDown( count ) ;
}