int main()
{
string str;
?
//輸入一個字符串
getline(cin, str);
//實例化對象
Test* s = new Test();
//設置對象中的數據成員值
s->SetStr(str);
cout << "您輸入的字符串是：" << s->GetStr() << endl;
cout << "字符串長度為：" << s->GetLength() << endl;
//將字符串顛倒輸出
cout << "將字符串倒序輸出：";
s->Reverse();
//釋放對象空間
delete s;
?
return 0;
}

reverse(s.begin(), s.end());

#include<bits/stdc++.h>
#include<string>
#include<algorithm>
using namespace std;
class Test{
	private:
		string new_s;
	public:
		Test(){}
		void SetStr(string ns){
			new_s=ns;
		}
		string GetStr(){
			return new_s;
		}
		int GetLength(){
			return new_s.length();
		}//無法置換 
		void Reverse(){
			reverse(new_s.begin(),new_s.end());
			cout<<new_s<<endl;
		}
};