一、分析

     使用位运算交换整数，可使用按位异或的方法，省掉临时变量，减少空间复杂度

二、源码

   1: #include "stdio.h"

   2:  

   3: int main()

   4: {

   5:     int a, b;

   6:     a = 5;

   7:     b = 10;

   8:     printf("a = %d, b = %d\n", a, b);

   9:     a = a ^ b;

  10:     b = b ^ a;

  11:     a = a ^ b;

  12:     printf("a = %d, b = %d\n", a, b);

  13:     getchar();

  14:     return 0;

  15: }