private: System::Void button1_Click(System::Object^  sender, System::EventArgs^  e) {
		if(radioButton1->Checked)
			label1->Text=(Double::Parse(textBox1->Text) + Double::Parse(textBox2->Text)).ToString();

		if(radioButton2->Checked)
			label1->Text=(Double::Parse(textBox1->Text) - Double::Parse(textBox2->Text)).ToString();

		if(radioButton3->Checked)
			label1->Text=(Double::Parse(textBox1->Text) * Double::Parse(textBox2->Text)).ToString();

		if(radioButton4->Checked)
			label1->Text=(Double::Parse(textBox1->Text) / Double::Parse(textBox2->Text)).ToString();
	}