// adds a decimal
/*private void buttonDecimal_Click(object sender, EventArgs e)
* {
* functions.AddDecimal();
* display.Text = functions.entry;
* buttonEquals.Focus();
* }*/
// negates entry
private void buttonNegate_Click(object sender, EventArgs e)
{
functions.Negate();
display.Text = functions.entry;
buttonEquals.Focus();
}