问题:https://leetcode.com/problems/hamming-distance/?tab=Description
The Hamming distance between two integers is the number of positions at which the corresponding bits are different.Given two integers x and y, calculate the Hamming distance.
Note:0 ≤ x, y < 231.
Example: Input: x = 1, y = 4 Output: 2
Explanation:
1 (0 0 0 1)
4 (0 1 0 0)
↑ ↑
The above arrows point to positions where the corresponding bits are different.
分析:从最后一位,依次判断。
参考C++代码:
class Solution {
public:
int hammingDistance(int x, int y) {
int count=0;
while( x||y){
if((x&1) ^ (y&1))
count++;
x=x>>1;
y=y>>1;
}
return count;
}
};