LintCode: Flip Bits

 1 class Solution {
 2 public:
 3     /**
 4      *@param a, b: Two integer
 5      *return: An integer
 6      */
 7     int bitSwapRequired(int a, int b) {
 8         // write your code here
 9         unsigned int tmpA = a;
10         unsigned int tmpB = b;
11         int steps = 0;
12         while (tmpA || tmpB) {
13             steps += (tmpA&0x1)^(tmpB&0x1);
14             tmpA >>= 1;
15             tmpB >>= 1;
16         }
17         return steps;
18     }
19 };