Question

How to use copy constructor in C++

Answer 1

#include <iostream>

using std::cout;
using std::endl;

class Point {
private:
	int x, y;
public:
	Point(int _x, int _y) { x = _x; y = _y; }

	// copy constructor
	Point(const Point &p2) { x = p2.x; y = p2.y; }

	int getX() { return x; }
	int getY() { return y; }
};

int main()
{
	Point p1(13, 17); 
	Point p2 = p1; // copy constructor run

	cout << p1.getX() << "  " << p1.getY() << endl;
	cout << p2.getX() << "  " << p2.getY() << endl;

	return 0;
}

/*
run:

13  17
13  17

*/

 

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