leetcode Length of Last Word

题目：https://oj.leetcode.com/problems/length-of-last-word/

题意：统计最后一个单词的字母个数

思路：注意开始和结尾的空格就行

class Solution {public:    int lengthOfLastWord(const char *s) {        int len = strlen(s);        if(len == 0) return 0;         int count = 0;        while(s[--len] == ' ');        while(len>=0){            if(s[len] == ' ') break;            count ++;            len--;        }        return count;    }};