#include <iostream>
using namespace std;
 
class T
{
    int _i;
    public:
    T(int i) { 
    	_i=i; 
    	cout << "construction of T" << endl;
    };
 
    virtual void f() { };
 
    ~T() {
    	cout << "destruction of T" << endl;	
    };
};
 
class T1: public T
{
    public:
    T1() : T(1) {
    	cout << "construction of T1" << endl;
    };
 
    virtual void f() { };
 
    ~T1() {
    	cout << "destruction of T1" << endl;
    };
};
 
int main() {
	T* t1 = new T1();
	delete t1;
	return 0;
}

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