void button_Click(object sender, EventArgs e)
{
Button btn = (Button)sender;
string buttontype = btn.Tag.ToString();
switch (buttontype)
{
case "0": helper.Num(textBox1, btn.Text);
break;
case "1": helper.FucClick(textBox1, btn.Name);
break;
case "2": helper.Equal(textBox1);
break;
case "3": helper.Clear(textBox1);
break;
case "4": helper.Point(textBox1);
break;
case "5": helper.MonocularOperation(textBox1, btn.Name);
break;
}
}
