#include "pch.h"
#include <iostream>
using namespace std;

class Vector
{
private:
	int *m;
	int abscissa;
	int ordinata;
public:
	Vector(int x, int y)
	{
		abscissa = x; ordinata = y;
		m = new int[2];
	};
	Vector operator +(Vector &v1);
	Vector operator -(Vector&v1);
	double operator *(Vector&v1);
	Vector operator *(double s);
	friend ostream& operator<< (ostream &out, const Vector &v);
	friend istream& operator>> (istream &in, const Vector &v);
};
ostream&operator<<(ostream &out, const Vector &v) {
	for (int i = 0; i < 2; i++)
		out << v.m[i] << endl;
	return out;
};
istream& operator>> (istream &in, const Vector &v) {
	for (int i = 0; i < 2; i++)
		in >> v.m[i];
	return in;
};
Vector Vector :: operator+(Vector&v1) {
	Vector tmp(abscissa, ordinata);
	for (int i = 0; i < 2; i++)
		tmp.m[i] = m[i] + v1.m[i];

	return tmp;
};
Vector Vector::operator-(Vector&v1) {
	Vector tmp(abscissa, ordinata);
	for (int i = 0; i < 2; i++)
		tmp.m[i] = m[i] - v1.m[i];

	return tmp;
};
double Vector::operator*(Vector&v1) {
	double k = 0;
	k = (m[0] * v1.m[0] - m[1] * v1.m[1]) + (m[0] * v1.m[1] + m[1] * v1.m[0]);
	return k;
};
Vector Vector::operator*(double s) {
	Vector tmp(abscissa, ordinata);
	for (int i = 0; i < 2; i++)
		tmp.m[i] = m[i] * s;

	return tmp;
}

int main()
{
	setlocale(LC_ALL, "ru");
	int k;
	double d = 0;
	int s = 0, p = 0;
	int x = 0;
	int y = 0;
	Vector v1(x, y);
	Vector v2(x, y);
	Vector m(x, y);
	while (1)
	{
		cout << "\n\t Меню \t\n";
		cout << "\t 1 - Ввод координат вектора v1 \t\n";
		cout << "\t 2 - Ввод координат вектора  v2 \t\n";
		cout << "\t 3 - Вывод координат на экран \t\n";
		cout << "\t 4 - Сложение векторов v1+v2 \t\n";
		cout << "\t 5 - Вычитание векторов v1 - v2 \t\n";
		cout << "\t 6 - Скалярное умножение векторов v1 * v2 \t\n";
		cout << "\t 7 - Умножение вектора v1 на скаляр  \t\n";
		cout << "\t 8 - Умножение вектора v2 на скаляр \t\n";
		cout << "\t 0 - Выход \t\n";
		cin >> k;
		switch (k)
		{
		case 1: {
			system("cls");
			cin >> v1;
			cout << endl;
			break; };
		case 2: {
			system("cls");
			cin >> v2;
			cout << endl;
			break; };
		case 3: {
			system("cls");
			cout << v1 << endl;
			cout << v2 << endl;
			cout << endl;
			break; };
		case 4: {
			system("cls");
			m = v1.operator+(v2);
			cout << m;
			cout << endl;
			break; };
		case 5: {
			system("cls");
			m = v1.operator-(v2);
			cout << m;
			cout << endl;
			break; };
		case 6: {
			system("cls");
			d = v1.operator*(v2);
			cout << d;
			cout << endl;
			break; };
		case 7: {
			system("cls");
			cout << "Ведите скаляр" << endl;
			cin >> s;
			m = v1.operator*(s);
			cout <<endl<< m;
			cout << endl;
			break; };
		case 8: {
			system("cls");
			cout << "Ведите скаляр";
			cin >> s;
			m = v2.operator*(s);
			cout <<endl<< m;
			cout << endl;
			break; };
		case 0: {exit(0); }
		default: {
			system("cls");
			cout << "Введено недопустимое значение, нажмите на любую клавишу для продолжения \n";
			break; };
		};
	};

	return 0;
};