在运行时确定对象的类型

#include "stdafx.h"



#include <iostream>

#include <typeinfo>



using namespace std;



class Base {};

class Derived : public Base {};



int main( ) {



	Base b, bb;

	Derived d;



	// Use typeid to test type equality

	if (typeid(b) == typeid(d)) { // No

		cout << "b and d are of the same type.\n";

	}

	if (typeid(b) == typeid(bb)) { // Yes

		cout << "b and bb are of the same type.\n";

	}

	if (typeid(d) == typeid(Derived)) { // Yes

		cout << "d is of type Derived.\n";

		cout<<typeid(d).name()<<endl;

	}

}