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191. Number of 1 Bits(LeetCode)

时间:2017-05-15 11:59:42      阅读:126      评论:0      收藏:0      [点我收藏+]

标签:for   example   weight   style   count()   ati   turn   set   write   

Write a function that takes an unsigned integer and returns the number of ’1‘ bits it has (also known as the Hamming weight).

For example, the 32-bit integer ’11‘ has binary representation 00000000000000000000000000001011, so the function should return 3.

有三种方法计算1的个数,可以参看我的其他随笔

1 class Solution {
2 public:
3     int hammingWeight(uint32_t n) {
4          bitset<64> bs(n);
5           return bs.count();
6           
7     }
8 };

 

191. Number of 1 Bits(LeetCode)

标签:for   example   weight   style   count()   ati   turn   set   write   

原文地址:http://www.cnblogs.com/wujufengyun/p/6855544.html

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