#include <iostream>

using namespace std;

/*
	a, b, c - сторони трикутрика
	Triangle (float x, float y, float z) - констуктор ініціалізації списком
	Triangle(const Triangle &src) - конструктор копіювання
	friend Triangle operator - (const Triangle &a, const Triangle &b) - оператор - як дружня функція
	bool operator > (Triangle &a) - оператор >
	void set(char q) - SET
	void show(char q) - SHOW
	float calcP() { return a + b + c; } - обчислення периметра
	void showCond(char q, float p) - друкування інформації з умовою що P() > p
*/


class Triangle {
	float a, b, c;
	
	public:
		Triangle() { a = b = c = 0; cout << "Used empty constructor" << endl;}
		
		Triangle (float x, float y, float z) : a(x), b(y), c(z) { cout << "Used list constructor" << endl; }
		
		Triangle(const Triangle &src) { a = src.a; b = src.b; c = src.c; cout << "Used copy constructor" << endl; }
		
		friend Triangle operator - (const Triangle &a, const Triangle &b);
		
		bool operator > (Triangle &a) {	return (calcP() > a.calcP()); }

		void set(char q);
		
		void show(char q);
		
		float calcP() { return a + b + c; }
		
		void showCond(char q, float p) {
			if (calcP() > p) show(q);
			else cout << "Triangle " << q << " perimeter < p" << endl << endl;
		}	
};

int main() {
	Triangle C1;
	
	C1.set('1');
	
	Triangle C2(3, 4, 5);
	
	C2.show('2');
	
	Triangle C3 = C2;
	
	C3.show('3');
	
	Triangle C4;
	
	C4 = C1 - C2;
	
	C4.show('4');
	
	cout << "C4 > C1: " << (C4 > C1) << endl << endl;
	
	cout << "P of tiangle C1 = " << C1.calcP() << endl;
	cout << "P of tiangle C2 = " << C2.calcP() << endl;
	cout << "P of tiangle C3 = " << C3.calcP() << endl;
	cout << "P of tiangle C4 = " << C4.calcP() << endl;
	
	int n;
	
	cout << endl << "Enter count of objects: ";
	cin >> n;
	
	Triangle objs[n];
	
	for (int i = 0; i < n; i++) {
		objs[i].set(i + '0');
	}
	
	float p;
	cout << endl << "Enter p: ";
	cin >> p;
	
	cout << endl << "Result: " << endl;
	
	for (int i = 0; i < n; i++) {
		cout << "P of triangle " << i + 1 << " = " << objs[i].calcP() << endl;
		objs[i].showCond(i + '0', p);
	}
	
	return 0;
}

void Triangle :: set(char q) {
	cout << "Enter info about triangle " << q << ":" << endl;
	cout << "\ta: ";
	cin >> a;
	cout << "\tb: ";
	cin >> b;
	cout << "\tc: ";
	cin >> c;
	cout << endl;
}
		
void Triangle :: show(char q) {
	cout << "Info about triangle " << q << ":" << endl;
	cout << "\ta: " << a << endl;
	cout << "\tb: " << b << endl;
	cout << "\tc: " << c << endl;
	cout << endl;	
}

Triangle operator - (const Triangle &a, const Triangle &b) {
	Triangle c(a.a - b.a, a.b - b.b, a.c - b.c);
	return c;
}