#include <iostream>
using namespace std;
 
class first {
int random;
public: 
	first() {
		cout << "first created." << endl;
	}
	~first() {
		cout << "first destroyed." << endl;
	}
};
 
class composition {
first* firstObj;
public:
	composition () {
		firstObj = new first;
		if (firstObj != NULL) { 
			cout << "firstObj points to an object of first" << endl;
			}
		cout << "An object of composition has been created." << endl;
	}
 
	~composition() {
		delete firstObj;
		cout << "composition destroyed." << endl;
	}
};
 
int main() {
	composition com;
	return 0;
}
 
/*
Output:
 
first created.
firstObj points to an object of first
An object of composition has been created.
first destroyed.
composition destroyed.
 
 
With delete firsObj ommited:
 
first created.
firstObj points to an object of first
An object of composition has been created.
composition destroyed.
 
*/