面试题 倒转字符串

要求单词倒转，但是单词本身不倒转，其中单词由一个空格隔开

输入：“优快云 is a good place”

输出：”place good a is 优快云“

C++代码如下:

string reverseString(const string & str)
{
	string result = str;
	int nowindex = 0;
	int lastindex = nowindex;
	while ((nowindex=nowindex = result.find(" ",nowindex)) != string::npos)
	 {
		 reverse(result.begin()+lastindex,result.begin()+nowindex);
		 nowindex++;
		 lastindex = nowindex;
	 }
	 reverse(result.begin()+lastindex,result.end());
	 reverse(result.begin(),result.end());
	 return result;
}