//testovanie MathHead Faktorial
public void Function_Fakt()
{
MathHeadFunctiones mh = new MathHeadFunctiones();
Assert.AreEqual(120, mh.Fact(5));
Assert.AreEqual(1, mh.Fact(1));
Assert.AreEqual(1, mh.Fact(0));
Assert.AreEqual(479001600, mh.Fact(12));
// Doplnit osetrenie ak faqtorial sa == zaporne cislo
}
/// <summary>
/// Metóda btn_fact_Click, ktorá je volaná pri stlačení tlačidla "x!". Metóda počíta faktorial čísla pomocou metódy Fact() volanej z matematickej knižnice
/// Ošetruje chybové stavy, pridá funkciu do histórie a výsledok vypíše do textBoxu výsledku.
/// </summary>
/// <param name="sender">Objekt, ktorý sa posiela do danej metódy</param>
/// <param name="e">Dáta udalosti, ktoré sa posielajú do danej metódy</param>
private void btn_fact_Click(object sender, EventArgs e)
{
MathHead mh = new MathHead();
if (enterPressed == true)
{
lbl_history.Text = "";
enterPressed = false;
}
double x;
if (Double.TryParse(resultBox.Text, out x))
{
if (x < 0)
{
lbl_history.Text = "";
historyStringValue = 0;
historyValue = 0;
resultBox.Font = new Font(resultBox.Font.FontFamily, 20);
resultBox.Text = "Neplatný vstup";
errorCode = 1;
funcPressed = false;
operationPressed = false;
enterPressed = true;
operation = "";
return;
}
}
try
{
UInt64.Parse(resultBox.Text);
}
catch (FormatException)
{
Error(1);
return;
}
catch (OverflowException)
{
Error(3);
return;
}
switch (operation)
{
case "+":
lbl_history.Text = lbl_history.Text + "fact(" + UInt64.Parse(resultBox.Text) + ")";
resultValue = historyValue + mh.Fact(UInt64.Parse(resultBox.Text));
resultBox.Text = resultValue.ToString();
historyValue = resultValue;
break;
case "-":
lbl_history.Text = lbl_history.Text + "fact(" + UInt64.Parse(resultBox.Text) + ")";
resultValue = historyValue - mh.Fact(UInt64.Parse(resultBox.Text));
resultBox.Text = resultValue.ToString();
historyValue = resultValue;
break;
case "*":
lbl_history.Text = lbl_history.Text + "fact(" + UInt64.Parse(resultBox.Text) + ")";
resultValue = historyValue * mh.Fact(UInt64.Parse(resultBox.Text));
resultBox.Text = resultValue.ToString();
historyValue = resultValue;
break;
case "/":
lbl_history.Text = lbl_history.Text + "fact(" + UInt64.Parse(resultBox.Text) + ")";
resultValue = historyValue / mh.Fact(UInt64.Parse(resultBox.Text));
resultBox.Text = resultValue.ToString();
historyValue = resultValue;
break;
default:
if (funcPressed == true)
{
lbl_history.Text = "fact(" + historyString + ")";
}
else
{
lbl_history.Text = lbl_history.Text + "fact(" + UInt64.Parse(resultBox.Text) + ")";
}
resultValue = mh.Fact(UInt64.Parse(resultBox.Text));
resultBox.Text = resultValue.ToString();
historyValue = resultValue;
break;
}
if (resultValue == 0)
{
Error(3);
return;
}
historyString = lbl_history.Text;
operationPressed = false;
operation = "";
funcPressed = true;
NewFont();
maxChar = false;
btn_enter.Focus();
}