LeetCode58 Length of Last Word

题目：

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

. （Easy）

分析：

注意把最后的空格处理掉即可。

代码：

class Solution {
public:
int lengthOfLastWord(string s) {
int start = s.size() - 1;
int result = 0;
while (s[start] == ' ') {
start--;
}
for (int i = start; i >= 0; --i) {
if (s[i] != ' ') {
result++;
}
else {
return result;
}
}
return result;
}
};