[C++] Sayı Artırma & Ve Azaltma

public Form1()
	        {
	            InitializeComponent();
	        }
	
	
	        private void btn_Arttir_Click(object sender, EventArgs e)
	        {
	            txt_Sayi.Text = (Convert.ToInt32(txt_Sayi.Text) + Convert.ToInt32(txt_Miktar.Text)).ToString();
	        }
	
	
	        private void btn_Azalt_Click(object sender, EventArgs e)
	        {
	            txt_Sayi.Text = (Convert.ToInt32(txt_Sayi.Text) - Convert.ToInt32(txt_Miktar.Text)).ToString();
	        }