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 len = strlen(s), cnt = 0;
bool flag = false;
for(int i = len-1; i >= 0 ; --i){
if(s[i]!=' ') {flag =true;cnt++;}
else if(flag) break;
}
return cnt;
}
};