15算法课程 58. 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.

solution:

注意末尾空格

code:

class Solution {public:    int lengthOfLastWord(string s) {        while(s[s.size()-1] == ' ') s.erase(s.size()-1);        return s.size() - s.rfind(' ') -1;    }};