[Leetcode] 557. Reverse Words in a String III 解题报告

题目：

Given a string, you need to reverse the order of characters in each word within a sentence while still preserving whitespace and initial word order.

Example 1:

Input: "Let's take LeetCode contest"
Output: "s'teL ekat edoCteeL tsetnoc"

Note: In the string, each word is separated by single space and there will not be any extra space in the string.
思路：

练手题目，哈哈。

代码：

class Solution {
public:
string reverseWords(string s) {
int start = 0, end = 0;
while (start < s.length()) {
while (end < s.length() && s[end] != ' ') {
++end;
}
reverse(s.begin() + start, s.begin() + end);
start = end + 1;
end = start;
}
return s;
}
};