#include <iostream>

#pragma once
class Vector
{
public:
	Vector() {
		data = new int[1];
		size = 0;
		capacity = 1;
		std::cout << "creating obj\n";
	}
	Vector(int _size) {
		if (_size <= 0)
			throw "size must be more than 0\n";
		capacity = _size;
		data = new int[capacity];
		size = 0;


	}
	int getSize() {

		return size;
	}
	Vector(int source[], int _size) {
		capacity = _size;
		size = _size;
		data = new int[capacity];
		for (int i = 0; i < capacity; ++i)
			data[i] = source[i];

	}
	void push_back(int val) {
		if (size < capacity)
		{
			data[size++] = val;
			return;
		}
		int* dmp = new int[capacity];
		for (int i = 0; i < capacity; ++i)
			dmp[i] = data[i];
		dmp[size++] = val;
		delete[] data;
		data = dmp;
	}
	int pop_back() {
		if (size == 0)
			throw"exeption";
		return data[size--];



	}
	int& getElemAt(int index) {
		if ((index < 0) || (index > size - 1))
			throw"exp";
		return data[index];

	}
	// коструктор по умолчанию
	~Vector() {
		std::cout << "EXTERMINATE\n";
		delete[] data;
	}


	void print() {
		for (int i = 0; i < size; ++i)
			std::cout << data[i] << " \n";
		std::cout << std::endl;


	}
private:
	int*data;
	int size;
	int capacity;


};