58. Length of Last Word.c

/*
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.

Example:
    Input: "Hello World"
    Output: 5
*/

int lengthOfLastWord(char* s) {
    int res = 0, i = 0;
    int length = strlen(s);
    for (; i < length; ++i) {
        if (s[i] == ' ') {
            if (s[i + 1] != '\0' && s[i + 1] != ' ') {
                res = 0;   
            }
        } else {
            ++res;
        }
    }
    return res;
}