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Given an input string, reverse the string word by word.
For example,
Given s = "the sky is blue",
return "blue is sky the".
Update (2015-02-12):
For C programmers: Try to solve it in-place in O(1) space.
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思路：
s中两边可能有空格，单词之间可能有多个空格，这些都需要去掉。
用正则表达式就是爽~~~
java code:
public class Solution {
public String reverseWords(String s) {
String[] strs = s.trim().split("\\s+");
String ans = "";
for(int i=strs.length-1;i>=0;i--) {
if(i!=0)
ans += strs[i]+" ";
else
ans += strs[i];
}
return ans;
}
}LeetCode:Reverse Words in a String
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原文地址：http://blog.csdn.net/itismelzp/article/details/51544375
