#include <stdio.h>

#define BYTE0 0x000000ff
#define BYTE1 0x0000ff00
#define BYTE2 0x00ff0000
#define BYTE3 0xff000000

main()
{  int word;

   word = 0x61626364; /* a b c d */

   printf("%8x\n",word&BYTE0);
   printf("%8x\n",word&BYTE1);
   printf("%8x\n",word&BYTE2);
   printf("%8x\n",word&BYTE3);
}