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. http://leetcode.com/onlinejudge#que…

leetcode_length_of_last_word.cpp

class Solution {
public:
    int lengthOfLastWord(const char *s) {
        int ans = 0;
        int cnt = 0;
        for (int i = 0; s[i] != 0; ++i) {
            if (s[i] == ' ')
                cnt = 0;
            else {
                cnt++;
                ans = cnt;
            }
        }
        return ans;
    }
};