[LeetCode] 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) {        int count = 0,last = 0;        while(*s != '\0'){            count = *s == ' ' ? 0 : count + 1;            last = count > 0 ? count : last;            s ++;        }        return last;    }};