mat

#define _CRT_SECURE_NO_WARNINGS
#include <iostream>

using namespace std;

class DynamicArray
{
	int size;
	int* mas;
public:
	DynamicArray()
	{
		size = 0;
		mas = nullptr;
	}
	DynamicArray(const DynamicArray& DynamicArray)
	{
		mas = new int[DynamicArray.size];

		for (int i = 0; i < DynamicArray.size; i++)
			mas[i] = DynamicArray.mas[i];

		size = DynamicArray.size;
	}
	~DynamicArray()
	{
		size = 0;
		if (mas != nullptr)
			delete[] mas;
	}
	void display()
	{
		for (int i = 0; i < size; i++)
			cout << mas[i] << ' ';
		cout << endl;
	}
	void put(const int obi)
	{
		int sizesn = size + 1;
		int* massn = new int[sizesn];

		for (int i = 0; i < size; i++)
			massn[i] = mas[i];

		massn[size] = obi;

		if (mas != nullptr)
			delete[] mas;

		mas = massn;
		size = sizesn;
	}
	void retur(const int obj)
	{
		int sizesn = size - 1;
		int* massn = new int[sizesn];

		for (int i = 0; i < obj; i++)
			massn[i] = mas[i];

		for (int i = obj; i < sizesn; i++)
			massn[i] = mas[i + 1];

		if (mas != nullptr)
			delete[] mas;

		mas = massn;
		size = sizesn;
	}
};

void main()
{
	DynamicArray Func;

	Func.put(222);

	Func.display();

	system("pause");
}