program3_10.c

[C语言入门经典(第4版)]整本书的源码！值得推荐！全部是最简单的源码！

/* Program 3.10 Exercising bitwise operators */
#include <stdio.h>

int main(void)
{
  unsigned int original = 0xABC;
  unsigned int result = 0;
  unsigned int mask = 0xF;    /* Rightmost four bits                      */

  printf("\n original = %X", original);

  /* Insert first digit in result */
  result |= original&mask;    /* Put right 4 bits from original in result */

  /* Get second digit */
  original >>= 4;             /* Shift original right four positions      */
  result <<= 4;               /* Make room for next digit                 */
  result |= original&mask;    /* Put right 4 bits from original in result */

  /* Get third digit */
  original >>= 4;             /* Shift original right four positions      */
  result <<= 4;               /* Make room for next digit                 */
  result |= original&mask;    /* Put right 4 bits from original in result */
  printf("\t result = %X\n", result);
  return 0;
}