private void BtnLimpiar_Click(object sender, EventArgs e)
{
TxtN1.Clear();
TxtN2.Clear();
TxtN3.Clear();
TxtN4.Clear();
TxtProm.Clear();
TxtN1.Focus();
}
private void BtnCalcular_Click(object sender, EventArgs e)
{
if (TxtN1.Text.Trim().Length == 0)
{
MessageBox.Show("Ingrese un dato");
TxtN1.Focus();
return;
}
if (TxtN2.Text.Trim().Length == 0)
{
MessageBox.Show("Ingrese un dato");
TxtN2.Focus();
return;
}
if (TxtN3.Text.Trim().Length == 0)
{
MessageBox.Show("Ingrese un dato");
TxtN3.Focus();
return;
}
if (TxtN4.Text.Trim().Length == 0)
{
MessageBox.Show("Ingrese un dato");
TxtN4.Focus();
return;
}
double n1, n2, n3, n4, prom;
n1 = Convert.ToDouble(TxtN1.Text);
n2 = Convert.ToDouble(TxtN2.Text);
n3 = Convert.ToDouble(TxtN3.Text);
n4 = Convert.ToDouble(TxtN4.Text);
prom = (n1 + n2 + n3 + n4) / 4;
TxtProm.Text = prom.ToString();
}