[LeetCode] Reverse Words in a String 翻转字符串中的单词

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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.

click to show clarification.

Clarification:

• What constitutes a word?
  A sequence of non-space characters constitutes a word.
• Could the input string contain leading or trailing spaces?
  Yes. However, your reversed string should not contain leading or trailing spaces.
• How about multiple spaces between two words?
  Reduce them to a single space in the reversed string.

[LeetCode] Reverse Words in a String 翻转字符串中的单词

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原文地址：http://www.cnblogs.com/grandyang/p/4606676.html