/**
 * color: Fun with RGB colors.
 */

// +---------+--------------------------------------------------------
// | Headers |
// +---------+

#include <stdio.h>


// +---------+--------------------------------------------------------
// | Helpers |
// +---------+

int
rgb (int red, int green, int blue)
{
  red = red << 16; // shifted by 16
  green = green << 8; // shifted by 8
  blue = blue; // not shifted at all
  return red | green | blue;
} // rgb

int
red (int rgb)
{
  return (rgb >> 16) & 255;
} // red

void
helper (int red, int green, int blue)
{
  printf ("(%d,%d,%d) => %d\n", red, green, blue, rgb (red, green, blue));
} // helper

// +------+-----------------------------------------------------------
// | Main |
// +------+

int 
main ()
{
  helper (255,0,0);
  helper (255,0,255);
  helper (127, 127, 127);

  printf ("%d", red (rgb (255, 0, 0)));
  printf ("%d", red (rgb (255, 127, 16)));
  printf ("%d", red (rgb (15, 127, 16)));
  printf ("%d", red (rgb (15, 127, 127)));

  return 0;
} // main