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(string s) {        int len = 0, sz = s.length(), tmp = 0;        for(int i = 0; i < sz; ++i){            if(s[i] == ' ' && tmp != 0){                len = tmp;                tmp = 0;            } else if(s[i] != ' ')                 ++tmp;        }        if(tmp != 0) len = tmp;        return len;    }};