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(string s) { if(s.empty()) return 0; int len = s.length(); int i = len - 1; int lastLen = 0; // 去掉空格 while(s[i] == ‘ ‘ && i>=0){ --i; }//while while(i >= 0 && s[i] != ‘ ‘){ ++lastLen; --i; }//while return lastLen; } };
58. Length of Last Word (String)
原文：http://www.cnblogs.com/qionglouyuyu/p/5998948.html