/* --------------------------------------------------------------------- 
// Figure 3.13:  Countdown.
//               Fill the screen with 20 numbered lines.         
// --------------------------------------------------------------------- 
*/
#include <stdio.h> 
#define ITERATIONS  20

void main( void )
{
    int m;                             /* The loop counter. */
    
    puts( " This is a heading line." );                          
    m = ITERATIONS;                    /* Initialize the loop counter. */
    while (m > 0)   {                  /* Count downward from 20 to 1. */
        printf( " %i. \n", m );        /* Print the counter. */ 
        m = m - 1;                     /* Decrement the counter. */
    }

    puts( "\n This message should appear after a blank line." );
    puts( " Normal termination." );
}