private void BT_XOA_Click(object sender, EventArgs e)
{
TB_SOA.Clear();
TB_SOB.Clear();
TB_KQT.Clear();
SOA = 0;
SOB = 0;
KQT = 0;
LB_PT.Text = "NONE";
TB_SOA.Focus();
}
private void BT_KETQUATINH_Click(object sender, EventArgs e)
{
if (TB_KQT != null || KQT != 0)
{
SOTAM = int.Parse(TB_KQT.Text);
TB_SOA.Clear();
TB_SOB.Clear();
TB_KQT.Clear();
TB_SOA.Text = SOTAM.ToString();
SOA = SOTAM;
SOB = 0;
KQT = 0;
SOTAM = 0;
TB_SOB.Focus();
}
}