9

#include<iostream>
#include<array>
#include<algorithm>

template <class T, class U>
std::pair<U, T> My_Swap(T a, U b) {
	return std::make_pair(b, a);
}

template <class T, size_t N>
class MyClass {
	T arr[N];
public:
	MyClass() {
		for (int i = 0; i < N; i++)
			arr[i] = rand() % 10;
	}
	T* get_arr() { return arr; }
};


void main() {
	int a = 5;
	double b = 1.2;
	std::cout << "\n Before swap:\n " << a << " " << b << std::endl;

	auto temp = My_Swap(a, b);
	auto new_a = temp.first;
	auto new_b = temp.second;
	std::cout << "\n After swap:\n " << new_a << " " << new_b << std::endl;

	MyClass<int, 4> c, d;
	std::cout << "\n Before swap:\n";
	for (int i = 0; i < 4; i++)
		std::cout << " " << c.get_arr()[i] << " " << d.get_arr()[i] << std::endl;

	auto temp_2 = My_Swap(c, d);
	c = temp_2.first;
	d = temp_2.second;
	std::cout << "\n After swap:\n";
	for (int i = 0; i < 4; i++)
		std::cout << " " << c.get_arr()[i] << " " << d.get_arr()[i] << std::endl;
	system("pause");
}