C Tutorial/Data Type/Bit Shift

#include <stdio.h>
int main(void)
{
  unsigned int original = 0xABC;
  unsigned int result = 0;
  unsigned int mask = 0xF;    
  printf("\n original = %X", original);
  /* Insert first digit in result */
  result |= original&mask;    
  /* Get second digit */
  original >>= 4;             
  result <<= 4;               
  result |= original&mask;    
  /* Get third digit */
  original >>= 4;             
  result <<= 4;               
  result |= original&mask;    
  printf("\t result = %X\n", result);
  return 0;
}