#include<iostream>
#include<cmath>
using namespace std;

class Trinomial {
private: int x, x1, x2;
private: int firstСoefficient, secondСoefficient, thirdСoefficient;
private: int first = 3, second = 15, third = 34;
private: char check;

public: Trinomial(int first, int second, int third) {
			firstСoefficient = first;
			secondСoefficient = second;
			thirdСoefficient = third;
		}

public: void display() {
	cout << "Your expression: " << firstСoefficient << "'x^2 + ";
	cout << secondСoefficient << "x + " << thirdСoefficient;

	cout << "\nSecond expression: " << first << "'x^2 + ";
	cout << second << "x + " << third;

}
public: void sum() {
	cout << "Result of sum: ";
	check = checkSign(second, secondСoefficient);
	cout << first + firstСoefficient << "x^2 " << check << ' ';
	check = checkSign(third, thirdСoefficient);
	cout << second + secondСoefficient << "x " << check << ' ';
	cout << third + thirdСoefficient << '\n';
}
public: void difference() {
	cout << "Result of difference: ";
	char check = checkSignInDifference(second, secondСoefficient);
	cout << first - firstСoefficient << "x^2 " << check << ' ';
	check = checkSignInDifference(third, thirdСoefficient);
	cout << second - secondСoefficient << "x " << check << ' ';
	cout << third - thirdСoefficient << '\n';
}

private: char checkSign(int first, int second) {
	int result = first + second;

	if (result >= 0) {
		return '+';
	}
	else {
		return '-';
	}
}
private: char checkSignInDifference(int first, int second) {
	int result = first - second;

	if (result >= 0) {
		return '+';
	}
	else {
		return '-';
	}
}

public: void complainig() {

	double firstD = calculation(firstСoefficient, secondСoefficient, thirdСoefficient);
	double secondD = calculation(first, second, third);

	cout << "Result of complaining: ";
	if (firstD > secondD) {
		cout << "First expression is bigger than second\n";
	}
	else if (firstD < secondD) {
		cout << "First expression is bigger than second\n";
	}
	else {
		cout << "They are equal\n";
	}

}
private: int calculation(double Сoefficient, double sСoefficient, double tСoefficient) {
	if ((pow(sСoefficient, 2) - 4 * Сoefficient * tСoefficient) >= 0)
	{
		x1 = (-1 * sСoefficient + sqrt(pow(sСoefficient, 2) - 4 * Сoefficient * tСoefficient)) / (2 * Сoefficient);
		x2 = (-1 * sСoefficient + sqrt(pow(sСoefficient, 2) - 4 * Сoefficient * tСoefficient)) / (2 * Сoefficient);
	}
	else
	{
		return -1;
	}
	return x1 + x2;
}

public: void sumWithDouble() {
	double firstD = 3.0, secondD = 4.0, thirdD = 3.0;

	cout << "Result of double number sum: ";
	check = checkSign(secondD, secondСoefficient);
	cout << firstD + firstСoefficient << "x^2 " << check << ' ';
	check = checkSign(thirdD, thirdСoefficient);
	cout << secondD + secondСoefficient << "x " << check << ' ';
	cout << thirdD + thirdСoefficient << '\n';
}
public: void multiplyWithDouble() {
	double firstEx[3] = { firstСoefficient, secondСoefficient, thirdСoefficient };
	int secondEx[3] = { first, second, third };
	int resultF = 0, resultS = 0, resultT = 0;

	for (int i = 0; i < 3; i++) {
		for (int j = 0; j < 3; j++) {
			if (i == 1) {
				resultS += (firstEx[i] * secondEx[j]);
			}
			else if (i == 2) {
				resultT += (firstEx[i] * secondEx[j]);
			}
			else {
				resultF += (firstEx[i] * secondEx[j]);
			}
		}
	}

	cout << "Result of multiply: ";
	cout << resultF << " + " << resultS << " + " << resultT << '\n';
}
public: void calculation(int x) {
	this->x = x;

	cout << "Result if x == " << x << ": ";
	cout << firstСoefficient * pow(x, 2) + secondСoefficient * x + thirdСoefficient<< '\n';
}

};

int main() {
	Trinomial t(1, 3, 4);
	t.display();
	t.sum();
	t.difference();
	t.complainig();
	t.sumWithDouble();
	t.multiplyWithDouble();
	t.calculation(2);


	return 0;
}