/*
 * draw a 'ruler' <n> columns wide on 'stdout'
 * invoke as:
 *      ruler n
 * or
 *      ruler                   (default 80)
 *
 * I don't remember if I acquired this, wrote it, or translated
 * it from another language. H.Moran
 */

main(argc,argv)
  int argc;
  char *argv[];
{
	register i, width;

	switch ( argc ) {
	  case 1:
	    width = 80;
	    break;

	  case 2:
	    width = atoi(argv[1]);
	    break;

	  default:
	    puts("usage:\n\truler [n]   (default 80)");
	    exit();
	  }

	for ( i = 0 ; i < width ;  ++i )
	  putchar( (i % 10 == 0) ?  '+' : '-' );
	putchar('\n');

	for ( i = 0 ; i < width ; ++i )
	  ( i % 10 == 0 ) ? putchar((i%100)/10 + '0') : putchar(' ');
	putchar( '\n' );

	for ( i = 0 ; i < width ; ++i )
	  putchar( i % 10 + '0');
	putchar('\n');

	for ( i = 0 ; i < width ; ++i )
	  putchar ( (i % 10 == 0) ? '+' : '-' );
	putchar('\n');
	}