C++简洁代码：
句子逆序
http://www.nowcoder.com/questionTerminal/48b3cb4e3c694d9da5526e6255bb73c3
C++简洁代码：
#include<bits/stdc++.h>
using namespace std;
int main() {
string str, res;
while(cin >> str) {
str += " " +res;
res = str;
}
cout << res << endl;
return 0;
}