private void BtnCalcularP_Click(object sender, EventArgs e)
{
double cal1, cal2, cal3, cal4;
cal1 = Convert.ToDouble(TxtCal1.Text.Trim());
cal2 = Convert.ToDouble(TxtCal2.Text.Trim());
cal3 = Convert.ToDouble(TxtCal3.Text.Trim());
cal4 = Convert.ToDouble(TxtCal4.Text.Trim());
pr.promedio(cal1, cal2, cal3, cal4);
foreach (TextBox txt in this.Controls.OfType <TextBox>())
{
txt.Clear();
TxtCal1.Focus();
}
}
