x.cpp

// Zaj3.cpp : This file contains the 'main' function. Program execution begins and ends there.
//

#include "pch.h"
#include <iostream>
#include <string>

using namespace std;

class CelsiusDeg;
class Kelvin;

class CelsiusDeg {
	double value = 0;
	CelsiusDeg(double value) {
		this->value = value;
	}
public:
	CelsiusDeg() {

	}
	CelsiusDeg operator + (const CelsiusDeg & x) {
		return CelsiusDeg(this->value + x.value);
	}
	CelsiusDeg operator - (const CelsiusDeg & x) {
		return CelsiusDeg(this->value - x.value);
	}
	CelsiusDeg & operator = (const CelsiusDeg & x) {
		value = x.value;
		return *this;
	}
	CelsiusDeg & operator =(double x)
	{
		value = x;
		return *this;
	}
	friend std::ostream & operator <<(std::ostream & os, const CelsiusDeg & i)
	{
		os << i.value;
		return os;
	}
	friend std::ostream & operator <<(std::ostream & os, CelsiusDeg & i)
	{
		os << i.value;
		return os;
	}
	friend std::istream & operator >>(std::istream & os, CelsiusDeg & i)
	{
		os >> i.value;
		return os;
	}
	//operator const Kelvin(){
	//	Kelvin k;
	//	k = value - 273.15;
	//	return k;
	//}
	operator double() {
		return value;
	}
};

class Kelvin {
	double value = 0;
	Kelvin(double value) {
		this->value = value;
	}
public:
	Kelvin() {

	}
	Kelvin operator + (const Kelvin & x) {
		return Kelvin(this->value + x.value);
	}
	Kelvin operator - (const Kelvin & x) {
		return Kelvin(this->value - x.value);
	}
	Kelvin & operator = (const Kelvin & x) {
		value = x.value;
		return *this;
	}
	Kelvin & operator =(double x)
	{
		value = x;
		return *this;
	}
	friend std::ostream & operator <<(std::ostream & os, const Kelvin & i)
	{
		os << i.value;
		return os;
	}
	friend std::ostream & operator <<(std::ostream & os, Kelvin & i)
	{
		os << i.value;
		return os;
	}
	friend std::istream & operator >>(std::istream & os, Kelvin & i)
	{
		os >> i.value;
		return os;
	}
	operator const CelsiusDeg() {
		CelsiusDeg k;
		k = value + 273.15;
		return k;
	}
	operator double() {
		return value;
	}
};

int main()
{
	std::cout << "Hello World!\n";

	CelsiusDeg c1, c2;
	Kelvin k1, k2;

	c2 = 5.0;
	k2 = 55.0;

	cout << c2 << endl;

	std::cout << (c1 + c2) << std::endl;
	std::cout << (c1 - c2) << std::endl;
	std::cout << (k1 + k2) << std::endl;
	std::cout << (k1 - k2) << std::endl;

	std::cout << (c1 + k2) << std::endl;
	std::cout << (c2 - k1) << std::endl;
	std::cout << (k2 + c1) << std::endl;
	std::cout << (k1 - k2) << std::endl;


}

// Run program: Ctrl + F5 or Debug > Start Without Debugging menu
// Debug program: F5 or Debug > Start Debugging menu

// Tips for Getting Started: 
//   1. Use the Solution Explorer window to add/manage files
//   2. Use the Team Explorer window to connect to source control
//   3. Use the Output window to see build output and other messages
//   4. Use the Error List window to view errors
//   5. Go to Project > Add New Item to create new code files, or Project > Add Existing Item to add existing code files to the project
//   6. In the future, to open this project again, go to File > Open > Project and select the .sln file