protected void abc_Click(object sender, EventArgs e)
{
if (sender == Button1)
{
TextBox3.Text = (cal.sum(Convert.ToInt32(TextBox1.Text), Convert.ToInt32(TextBox2.Text))).ToString();
}
else if (sender == Button2)
{
TextBox3.Text = (cal.mul(Convert.ToInt32(TextBox1.Text), Convert.ToInt32(TextBox2.Text))).ToString();
}
else if (sender == Button3)
{
TextBox3.Text = (cal.sub(Convert.ToInt32(TextBox1.Text), Convert.ToInt32(TextBox2.Text))).ToString();
}
else
{
TextBox3.Text = (cal.div(Convert.ToInt32(TextBox1.Text), Convert.ToInt32(TextBox2.Text))).ToString();
}
}
protected void Button2_Click(object sender, EventArgs e)
{
TextBox3.Text = (cal.sub(Convert.ToInt32(TextBox1.Text), Convert.ToInt32(TextBox2.Text))).ToString();
}