Возьми мой код в пример, и подскажи как использовать эти операторы #pragma once

namespace baobab {

	using namespace System;
	using namespace System::ComponentModel;
	using namespace System::Collections;
	using namespace System::Windows::Forms;
	using namespace System::Data;
	using namespace System::Drawing;
	class order
	{

	private:
		int index = 0;
		int* arrr = new int[index];
	public:
		friend void transfer(order&, int& i, int& pickelem);
		friend void pickindex(order&, int& indext);
		// перегрузка оператора “+”
		order operator+(order& order2) const {
			order result;
			for (int i = 0; i < this->index; i++) {
				result.push(this->arrr[i]);
			}
			for (int i = 0; i < order2.index; i++) {
				result.push(order2.arrr[i]);
			}
			return result;
		}
		// перегрузка оператора “=”
		order& operator=(const order& other) {
			if (this != &other) {
				this->index = other.index;
				delete[] this->arrr;
				this->arrr = new int[this->index];
				for (int i = 0; i < this->index; i++) {
					this->arrr[i] = other.arrr[i];
				}
			}
			return *this;
		}
			int push(int num) {
			if (index < 10) {
				arrr[index] = num;
				index++;
				return 0;
			}
			else return 1;
		}

		void pop()
		{
			for (int i = 0; i < index; i++)
			{
				arrr[i] = arrr[i + 1];
			}
			index--;
		}
	};
	order h;
	/// <summary>
	/// Сводка для MyForm
	/// </summary>
	public ref class MyForm : public System::Windows::Forms::Form
	{
	public:
		MyForm(void)
		{
			InitializeComponent();
			//
			//TODO: добавьте код конструктора
			//
		}
	protected:
		/// <summary>
		/// Освободить все используемые ресурсы.
		/// </summary>
		~MyForm()
		{
			if (components)
			{
				delete components;
			}
		}
	private: System::Windows::Forms::Button^ button1;
	private: System::Windows::Forms::Button^ button2;
	private: System::Windows::Forms::ListBox^ listBox1;
	private: System::Windows::Forms::ListBox^ listBox2;
	private: System::Windows::Forms::Label^ label1;
	private: System::Windows::Forms::Label^ label2;
	private: System::Windows::Forms::Label^ label3;
	private: System::Windows::Forms::Button^ button3;
	private: System::Windows::Forms::TextBox^ textBox1;
	private: System::Windows::Forms::Label^ label4;
	protected:

	private:
		/// <summary>
		/// Обязательная переменная конструктора.
		/// </summary>
		System::ComponentModel::Container ^components;

#pragma region Windows Form Designer generated code
		/// <summary>
		/// Требуемый метод для поддержки конструктора — не изменяйте 
		/// содержимое этого метода с помощью редактора кода.
		/// </summary>
		void InitializeComponent(void)
		{
			this->button1 = (gcnew System::Windows::Forms::Button());
			this->button2 = (gcnew System::Windows::Forms::Button());
			this->listBox1 = (gcnew System::Windows::Forms::ListBox());
			this->listBox2 = (gcnew System::Windows::Forms::ListBox());
			this->label1 = (gcnew System::Windows::Forms::Label());
			this->label2 = (gcnew System::Windows::Forms::Label());
			this->label3 = (gcnew System::Windows::Forms::Label());
			this->button3 = (gcnew System::Windows::Forms::Button());
			this->textBox1 = (gcnew System::Windows::Forms::TextBox());
			this->label4 = (gcnew System::Windows::Forms::Label());
			this->SuspendLayout();
			// 
			// button1
			// 
			this->button1->BackColor = System::Drawing::SystemColors::ButtonFace;
			this->button1->Cursor = System::Windows::Forms::Cursors::Hand;
			this->button1->Location = System::Drawing::Point(181, 99);
			this->button1->Margin = System::Windows::Forms::Padding(2);
			this->button1->Name = L"button1";
			this->button1->Size = System::Drawing::Size(85, 32);
			this->button1->TabIndex = 0;
			this->button1->Text = L"Push";
			this->button1->UseVisualStyleBackColor = false;
			this->button1->Click += gcnew System::EventHandler(this, &MyForm::button1_Click);
			// 
			// button2
			// 
			this->button2->Cursor = System::Windows::Forms::Cursors::Hand;
			this->button2->Location = System::Drawing::Point(181, 135);
			this->button2->Margin = System::Windows::Forms::Padding(2);
			this->button2->Name = L"button2";
			this->button2->Size = System::Drawing::Size(85, 30);
			this->button2->TabIndex = 1;
			this->button2->Text = L"Pop";
			this->button2->UseVisualStyleBackColor = true;
			this->button2->Click += gcnew System::EventHandler(this, &MyForm::button2_Click);
			// 
			// listBox1
			// 
			this->listBox1->FormattingEnabled = true;
			this->listBox1->Location = System::Drawing::Point(11, 25);
			this->listBox1->Margin = System::Windows::Forms::Padding(2);
			this->listBox1->Name = L"listBox1";
			this->listBox1->Size = System::Drawing::Size(80, 173);
			this->listBox1->TabIndex = 2;
			// 
			// listBox2
			// 
			this->listBox2->FormattingEnabled = true;
			this->listBox2->Location = System::Drawing::Point(95, 25);
			this->listBox2->Margin = System::Windows::Forms::Padding(2);
			this->listBox2->Name = L"listBox2";
			this->listBox2->Size = System::Drawing::Size(82, 173);
			this->listBox2->TabIndex = 3;
			// 
			// label1
			// 
			this->label1->AutoSize = true;
			this->label1->Location = System::Drawing::Point(11, 6);
			this->label1->Margin = System::Windows::Forms::Padding(2, 0, 2, 0);
			this->label1->Name = L"label1";
			this->label1->Size = System::Drawing::Size(78, 13);
			this->label1->TabIndex = 4;
			this->label1->Text = L"Struct contains";
			// 
			// label2
			// 
			this->label2->AutoSize = true;
			this->label2->Location = System::Drawing::Point(92, 6);
			this->label2->Margin = System::Windows::Forms::Padding(2, 0, 2, 0);
			this->label2->Name = L"label2";
			this->label2->Size = System::Drawing::Size(68, 13);
			this->label2->TabIndex = 5;
			this->label2->Text = L"Current items";
			// 
			// label3
			// 
			this->label3->AutoSize = true;
			this->label3->Location = System::Drawing::Point(178, 84);
			this->label3->Margin = System::Windows::Forms::Padding(2, 0, 2, 0);
			this->label3->Name = L"label3";
			this->label3->Size = System::Drawing::Size(39, 13);
			this->label3->TabIndex = 6;
			this->label3->Text = L"Label3";
			// 
			// button3
			// 
			this->button3->Cursor = System::Windows::Forms::Cursors::Hand;
			this->button3->Location = System::Drawing::Point(181, 169);
			this->button3->Margin = System::Windows::Forms::Padding(2);
			this->button3->Name = L"button3";
			this->button3->Size = System::Drawing::Size(85, 29);
			this->button3->TabIndex = 7;
			this->button3->Text = L"Show struct";
			this->button3->UseVisualStyleBackColor = true;
			this->button3->Click += gcnew System::EventHandler(this, &MyForm::button3_Click);
			// 
			// textBox1
			// 
			this->textBox1->Location = System::Drawing::Point(181, 25);
			this->textBox1->Margin = System::Windows::Forms::Padding(2);
			this->textBox1->Name = L"textBox1";
			this->textBox1->Size = System::Drawing::Size(85, 20);
			this->textBox1->TabIndex = 8;
			// 
			// label4
			// 
			this->label4->AutoSize = true;
			this->label4->Location = System::Drawing::Point(178, 6);
			this->label4->Margin = System::Windows::Forms::Padding(2, 0, 2, 0);
			this->label4->Name = L"label4";
			this->label4->Size = System::Drawing::Size(31, 13);
			this->label4->TabIndex = 9;
			this->label4->Text = L"Input";
			// 
			// MyForm
			// 
			this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
			this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
			this->BackColor = System::Drawing::SystemColors::GradientActiveCaption;
			this->ClientSize = System::Drawing::Size(276, 210);
			this->Controls->Add(this->label4);
			this->Controls->Add(this->textBox1);
			this->Controls->Add(this->button3);
			this->Controls->Add(this->label3);
			this->Controls->Add(this->label2);
			this->Controls->Add(this->label1);
			this->Controls->Add(this->listBox2);
			this->Controls->Add(this->listBox1);
			this->Controls->Add(this->button2);
			this->Controls->Add(this->button1);
			this->Cursor = System::Windows::Forms::Cursors::IBeam;
			this->Margin = System::Windows::Forms::Padding(2);
			this->Name = L"MyForm";
			this->Text = L"MyForm";
			this->ResumeLayout(false);
			this->PerformLayout();

		}

#pragma endregion
	private: System::Void button1_Click(System::Object^ sender, System::EventArgs^ e) 
	{
		//push
		h.push(System::Convert::ToInt32(textBox1->Text));
		if (listBox2->Items->Count < 10)
			listBox2->Items->Add(System::Convert::ToInt32(textBox1->Text));
		if (listBox2->Items->Count == 10)
		{
			button1->Enabled = false;
			button1->BackColor = System::Drawing::SystemColors::ControlDarkDark;
			label3->Text = "order full";
		}
	}
	private: System::Void button2_Click(System::Object^ sender, System::EventArgs^ e) 
	{
		//pop
		if (listBox2->Items->Count >= 1)
		{
			h.pop();
			listBox2->Items->RemoveAt(0);
			if (button1->Enabled == false)
			{
				button1->Enabled = true;
				button1->BackColor = System::Drawing::SystemColors::Control;
				label3->Text = "";
			}
		}
	}

	private: System::Void button3_Click(System::Object^ sender, System::EventArgs^ e) 
	{
		//show struct
		listBox1->Items->Clear();
		int pickedelem(0), indext(0);
		pickindex(h, indext);
		for (int j = 0; j < indext; j++)
		{
			transfer(h, j, pickedelem);
			listBox1->Items->Add(pickedelem);
		}
	}
};
	void pickindex(order& h, int& indext)
	{
		indext = h.index;
	}
	void transfer(order& h, int& i, int& pickelem)
	{
		pickelem = h.arrr[i];
	}
}