class Solution {

public:

    int lengthOfLastWord(const char *s) {

        int ans = ;

        int index = ;

        if(s == NULL)

            return ;

        while(s[index] != '\0')

        {

            while(s[index] == ' ')

                index ++;

            if(s[index] == '\0')

                break;

            ans = ;

            while(s[index] != ' ' && s[index] != '\0')

            {

                ans++;

                index++;

            }

        }

        return ans;

    }

};