C++ 字符串反转

#include 
#include 
using namespace std;
int main(){
	    string s;
    cin >> s;
    string temp;
    string::reverse_iterator iter;
    for(iter = s.rbegin();iter != s.rend(); ++iter){
        temp += *iter;
    }
    cout << temp << endl;
    cout << s << endl;
}