[leetcode 58] Length of Last Word

Given a string s consists of upper/lower-case alphabets and empty space characters ' ', return the length of last word in the string.

If the last word does not exist, return 0.

Note: A word is defined as a character sequence consists of non-space characters only.

For example, 
Given s = "Hello World",
return 5.

 

class Solution {public:    int lengthOfLastWord(const char *s) {        const int n = strlen(s);        int res = 0;        int ind = n - 1;        while (ind >= 0 && *(s+ind) == ' ') {            ind--;        }        while (ind >= 0 && *(s+ind) != ' ') {            ind--;            res++;        }        return res;    }};