default copy constructor

default_copy_constructor.cpp

#include <iostream>
using namespace std;

struct B {
	int a, b;
	B(): a(0), b(0) {}
	B(const B &other) = default;
};

int main() {
	// your code goes here
	B b;
	b.a = 5;
	b.b = 3;
	B c(b);
	B d;
	cout << c.a << " " << c.b << endl;
	cout << d.a << " " << d.b << endl;
	d = c;
	cout << d.a << " " << d.b << endl;
	return 0;
}