leetcode Length of Last Word

代码

class Solution {public:    int lengthOfLastWord(const char *s) {        int len = strlen(s);        if(len==0)            return 0;        int i = len-1;        int num = 0;        while(i>=0&&s[i]==' ')        {            --i;        }                while(i>=0&&s[i]!=' ')        {            num++;            --i;        }                return num;    }    };