/// <summary>
/// Metóda btn_op_Click, ktorá je volaná pri stlačení tlačidla operácie. Metóda vykoná predchádzajúcu operáciu (pokiaľ existuje).
/// Vypočíta operáciu pomocou metód volaných z matematickej knižnice. Ošetruje chybové stavy.
/// Nastavuje nadchádzajúcu operáciu na základe aktuálne kliknutej operácie. Pokiaľ bola operácia stlačená bezprostredne pred akutálnou operáciou,
/// stará operácie je prepísaná novou (aktuálne stlačenou operáciou).
/// </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_op_Click(object sender, EventArgs e)
{
MathHead mh = new MathHead();
Button button = (Button)sender;
if (operationPressed == true && (operation == "+" || operation == "-" || operation == "*" || operation == "/" || operation == "^" || operation == "\u221A"))
{
operation = button.Text;
lbl_history.Text = lbl_history.Text.Remove(lbl_history.Text.Length - 1) + operation;
}
else
{
if (enterPressed == true)
{
operation = button.Text;
lbl_history.Text = historyValue.ToString() + operation;
enterPressed = false;
}
else
{
try
{
Double.Parse(resultBox.Text);
}
catch (FormatException)
{
Error(0);
return;
}
historyStringValue = Double.Parse(resultBox.Text);
switch (operation)
{
case "+":
if (button.Text == "^" || button.Text == "\u221A" || button.Text == "*" || button.Text == "/")
{
betweenValue = historyValue;
historyValue = Double.Parse(resultBox.Text);
oldOperation = operation;
operation = button.Text;
}
else
{
resultValue = mh.Add(historyValue, Double.Parse(resultBox.Text));
resultBox.Text = resultValue.ToString();
historyValue = resultValue;
}
break;
case "^":
try
{
Int32.Parse(resultBox.Text);
}
catch (FormatException)
{
Error(2);
return;
}
if (Int32.Parse(resultBox.Text) < 0)
{
Error(2);
return;
}
switch (oldOperation)
{
case "+":
resultValue = betweenValue + mh.Exp(historyValue, Int32.Parse(resultBox.Text));
resultBox.Text = resultValue.ToString();
historyValue = resultValue;
betweenValue = 0;
oldOperation = "";
break;
case "-":
resultValue = betweenValue - mh.Exp(historyValue, Int32.Parse(resultBox.Text));
resultBox.Text = resultValue.ToString();
historyValue = resultValue;
betweenValue = 0;
oldOperation = "";
break;
case "*":
resultValue = betweenValue * mh.Exp(historyValue, Int32.Parse(resultBox.Text));
resultBox.Text = resultValue.ToString();
historyValue = resultValue;
betweenValue = 0;
oldOperation = "";
break;
case "/":
resultValue = betweenValue / mh.Exp(historyValue, Int32.Parse(resultBox.Text));
resultBox.Text = resultValue.ToString();
historyValue = resultValue;
betweenValue = 0;
oldOperation = "";
break;
default:
resultValue = mh.Exp(historyValue, Int32.Parse(resultBox.Text));
resultBox.Text = resultValue.ToString();
historyValue = resultValue;
oldOperation = "";
break;
}
break;
case "\u221A":
if (historyValue == 0)
{
Error(4);
return;
}
if (Double.Parse(resultBox.Text) < 0)
{
Error(1);
return;
}
switch (oldOperation)
{
case "+":
resultValue = betweenValue + mh.Root(Double.Parse(resultBox.Text), historyValue);
resultBox.Text = resultValue.ToString();
historyValue = resultValue;
betweenValue = 0;
oldOperation = "";
break;
case "-":
resultValue = betweenValue - mh.Root(Double.Parse(resultBox.Text), historyValue);
resultBox.Text = resultValue.ToString();
historyValue = resultValue;
betweenValue = 0;
oldOperation = "";
break;
case "*":
resultValue = betweenValue * mh.Root(Double.Parse(resultBox.Text), historyValue);
resultBox.Text = resultValue.ToString();
historyValue = resultValue;
betweenValue = 0;
oldOperation = "";
break;
case "/":
resultValue = betweenValue / mh.Root(Double.Parse(resultBox.Text), historyValue);
resultBox.Text = resultValue.ToString();
historyValue = resultValue;
betweenValue = 0;
oldOperation = "";
break;
default:
resultValue = mh.Root(Double.Parse(resultBox.Text), historyValue);
resultBox.Text = resultValue.ToString();
historyValue = resultValue;
oldOperation = "";
break;
}
break;
case "-":
if (button.Text == "^" || button.Text == "\u221A" || button.Text == "*" || button.Text == "/")
{
betweenValue = historyValue;
historyValue = Double.Parse(resultBox.Text);
oldOperation = operation;
operation = button.Text;
}
else
{
resultValue = mh.Sub(historyValue, Double.Parse(resultBox.Text));
resultBox.Text = resultValue.ToString();
historyValue = resultValue;
}
break;
case "*":
if (button.Text == "^" || button.Text == "\u221A" || button.Text == "/")
{
betweenValue = historyValue;
historyValue = Double.Parse(resultBox.Text);
oldOperation = operation;
operation = button.Text;
}
else
{
switch (oldOperation)
{
case "+":
resultValue = betweenValue + mh.Mul(historyValue, Double.Parse(resultBox.Text));
resultBox.Text = resultValue.ToString();
historyValue = resultValue;
betweenValue = 0;
oldOperation = "";
break;
case "-":
resultValue = betweenValue - mh.Mul(historyValue, Double.Parse(resultBox.Text));
resultBox.Text = resultValue.ToString();
historyValue = resultValue;
betweenValue = 0;
oldOperation = "";
break;
case "/":
resultValue = betweenValue / mh.Mul(historyValue, Double.Parse(resultBox.Text));
resultBox.Text = resultValue.ToString();
historyValue = resultValue;
betweenValue = 0;
oldOperation = "";
break;
default:
if (historyValue == 0)
{
historyValue = 1;
}
resultValue = mh.Mul(historyValue, Double.Parse(resultBox.Text));
resultBox.Text = resultValue.ToString();
historyValue = resultValue;
oldOperation = "";
break;
}
}
break;
case "/":
if (button.Text == "^" || button.Text == "\u221A" || button.Text == "*")
{
betweenValue = historyValue;
historyValue = Double.Parse(resultBox.Text);
oldOperation = operation;
operation = button.Text;
}
else
{
if (Double.Parse(resultBox.Text) == 0)
{
Error(4);
return;
}
switch (oldOperation)
{
case "+":
resultValue = betweenValue + mh.Div(historyValue, Double.Parse(resultBox.Text));
resultBox.Text = resultValue.ToString();
historyValue = resultValue;
betweenValue = 0;
oldOperation = "";
break;
case "-":
resultValue = betweenValue - mh.Div(historyValue, Double.Parse(resultBox.Text));
resultBox.Text = resultValue.ToString();
historyValue = resultValue;
betweenValue = 0;
oldOperation = "";
break;
case "*":
resultValue = betweenValue * mh.Div(historyValue, Double.Parse(resultBox.Text));
resultBox.Text = resultValue.ToString();
historyValue = resultValue;
betweenValue = 0;
oldOperation = "";
break;
default:
resultValue = mh.Div(historyValue, Double.Parse(resultBox.Text));
resultBox.Text = resultValue.ToString();
historyValue = resultValue;
oldOperation = "";
break;
}
}
break;
default:
historyValue = historyStringValue;
break;
}
if (funcPressed == true)
{
lbl_history.Text = historyStringValue.ToString() + button.Text;
}
else
{
lbl_history.Text = lbl_history.Text + historyStringValue.ToString() + button.Text;
}
operation = button.Text;
}
}
funcPressed = false;
enterPressed = false;
operationPressed = true;
NewFont();
maxChar = false;
btn_enter.Focus();
}
//testovanie MathHead Delenie
public void Function_Div()
{
MathHeadFunctiones mh = new MathHeadFunctiones();
Assert.AreEqual(39, mh.Div(156, 4));
Assert.AreEqual(1.8, mh.Div(9, 5));
Assert.AreEqual(-2, mh.Div(-6, 3));
Assert.AreEqual(129301, mh.Div(129301, 1));
Assert.AreEqual(2.25, mh.Div(9, 4));
Assert.AreEqual(2.25, mh.Div(-9, -4));
Assert.AreEqual(1000000, mh.Div(10000000, 10));
Assert.AreEqual(0.5, mh.Div(800, 1600));
Assert.AreEqual(-8, mh.Div(72, -9));
Assert.AreNotEqual(12, mh.Div(698, 68));
Assert.AreNotEqual(145, mh.Div(100000000, 78000000));
// pridat delenie 0 !!!
}
/// <summary>
/// Metóda btn_enter_Click, ktorá je volaná pri stlačení tlačidla "rovná sa". Má za úlohu zistiť naposledy kliknutú operáciu
/// a na základe nej vypočítať výsledok a ukončiť sekvenciu operácií. Tento výsledok sa následne vypíše do textBox výsledku a do histórie sa vypíše história operácií
/// zakončená posledným číslom a znaminekom rovnosti. Ošetruje aj chybové stavy.
/// </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_enter_Click(object sender, EventArgs e)
{
MathHead mh = new MathHead();
try
{
Double.Parse(resultBox.Text);
}
catch (FormatException)
{
Error(0);
return;
}
historyStringValue = Double.Parse(resultBox.Text);
switch (operation)
{
case "+":
resultValue = mh.Add(historyValue, Double.Parse(resultBox.Text));
resultBox.Text = resultValue.ToString();
historyValue = resultValue;
lbl_history.Text = lbl_history.Text + historyStringValue + "=";
break;
case "-":
resultValue = mh.Sub(historyValue, Double.Parse(resultBox.Text));
resultBox.Text = resultValue.ToString();
historyValue = resultValue;
lbl_history.Text = lbl_history.Text + historyStringValue + "=";
break;
case "*":
switch (oldOperation)
{
case "+":
resultValue = betweenValue + mh.Mul(historyValue, Double.Parse(resultBox.Text));
resultBox.Text = resultValue.ToString();
historyValue = resultValue;
lbl_history.Text = lbl_history.Text + historyStringValue + "=";
betweenValue = 0;
oldOperation = "";
break;
case "-":
resultValue = betweenValue - mh.Mul(historyValue, Double.Parse(resultBox.Text));
resultBox.Text = resultValue.ToString();
historyValue = resultValue;
lbl_history.Text = lbl_history.Text + historyStringValue + "=";
betweenValue = 0;
oldOperation = "";
break;
case "/":
resultValue = betweenValue / mh.Mul(historyValue, Double.Parse(resultBox.Text));
resultBox.Text = resultValue.ToString();
historyValue = resultValue;
lbl_history.Text = lbl_history.Text + historyStringValue + "=";
betweenValue = 0;
oldOperation = "";
break;
default:
resultValue = mh.Mul(historyValue, Double.Parse(resultBox.Text));
resultBox.Text = resultValue.ToString();
historyValue = resultValue;
lbl_history.Text = lbl_history.Text + historyStringValue + "=";
oldOperation = "";
break;
}
break;
case "^":
try
{
Int32.Parse(resultBox.Text);
}
catch (FormatException)
{
Error(2);
return;
}
if (Int32.Parse(resultBox.Text) < 0)
{
Error(2);
return;
}
switch (oldOperation)
{
case "+":
resultValue = betweenValue + mh.Exp(historyValue, Int32.Parse(resultBox.Text));
resultBox.Text = resultValue.ToString();
historyValue = resultValue;
lbl_history.Text = lbl_history.Text + historyStringValue + "=";
betweenValue = 0;
oldOperation = "";
break;
case "-":
resultValue = betweenValue - mh.Exp(historyValue, Int32.Parse(resultBox.Text));
resultBox.Text = resultValue.ToString();
historyValue = resultValue;
lbl_history.Text = lbl_history.Text + historyStringValue + "=";
betweenValue = 0;
oldOperation = "";
break;
case "*":
resultValue = betweenValue * mh.Exp(historyValue, Int32.Parse(resultBox.Text));
resultBox.Text = resultValue.ToString();
historyValue = resultValue;
lbl_history.Text = lbl_history.Text + historyStringValue + "=";
betweenValue = 0;
oldOperation = "";
break;
case "/":
resultValue = betweenValue / mh.Exp(historyValue, Int32.Parse(resultBox.Text));
resultBox.Text = resultValue.ToString();
historyValue = resultValue;
lbl_history.Text = lbl_history.Text + historyStringValue + "=";
betweenValue = 0;
oldOperation = "";
break;
default:
resultValue = mh.Exp(historyValue, Int32.Parse(resultBox.Text));
resultBox.Text = resultValue.ToString();
historyValue = resultValue;
lbl_history.Text = lbl_history.Text + historyStringValue + "=";
oldOperation = "";
break;
}
break;
case "\u221A":
if (historyValue == 0)
{
Error(4);
return;
}
if (Double.Parse(resultBox.Text) < 0)
{
Error(1);
return;
}
switch (oldOperation)
{
case "+":
resultValue = betweenValue + mh.Root(Double.Parse(resultBox.Text), historyValue);
resultBox.Text = resultValue.ToString();
historyValue = resultValue;
lbl_history.Text = lbl_history.Text + historyStringValue + "=";
betweenValue = 0;
oldOperation = "";
break;
case "-":
resultValue = betweenValue - mh.Root(Double.Parse(resultBox.Text), historyValue);
resultBox.Text = resultValue.ToString();
historyValue = resultValue;
lbl_history.Text = lbl_history.Text + historyStringValue + "=";
betweenValue = 0;
oldOperation = "";
break;
case "*":
resultValue = betweenValue * mh.Root(Double.Parse(resultBox.Text), historyValue);
resultBox.Text = resultValue.ToString();
historyValue = resultValue;
lbl_history.Text = lbl_history.Text + historyStringValue + "=";
betweenValue = 0;
oldOperation = "";
break;
case "/":
resultValue = betweenValue / mh.Root(Double.Parse(resultBox.Text), historyValue);
resultBox.Text = resultValue.ToString();
historyValue = resultValue;
lbl_history.Text = lbl_history.Text + historyStringValue + "=";
betweenValue = 0;
oldOperation = "";
break;
default:
resultValue = mh.Root(Double.Parse(resultBox.Text), historyValue);
resultBox.Text = resultValue.ToString();
historyValue = resultValue;
lbl_history.Text = lbl_history.Text + historyStringValue + "=";
oldOperation = "";
break;
}
break;
case "/":
if (Double.Parse(resultBox.Text) == 0)
{
Error(4);
return;
}
else
{
switch (oldOperation)
{
case "+":
resultValue = betweenValue + mh.Div(historyValue, Double.Parse(resultBox.Text));
resultBox.Text = resultValue.ToString();
historyValue = resultValue;
lbl_history.Text = lbl_history.Text + historyStringValue + "=";
betweenValue = 0;
oldOperation = "";
break;
case "-":
resultValue = betweenValue - mh.Div(historyValue, Double.Parse(resultBox.Text));
resultBox.Text = resultValue.ToString();
historyValue = resultValue;
lbl_history.Text = lbl_history.Text + historyStringValue + "=";
betweenValue = 0;
oldOperation = "";
break;
case "*":
resultValue = betweenValue * mh.Div(historyValue, Double.Parse(resultBox.Text));
resultBox.Text = resultValue.ToString();
historyValue = resultValue;
lbl_history.Text = lbl_history.Text + historyStringValue + "=";
betweenValue = 0;
oldOperation = "";
break;
default:
resultValue = mh.Div(historyValue, Double.Parse(resultBox.Text));
resultBox.Text = resultValue.ToString();
historyValue = resultValue;
lbl_history.Text = lbl_history.Text + historyStringValue + "=";
oldOperation = "";
break;
}
}
break;
}
if (double.IsInfinity(resultValue))
{
Error(2);
return;
}
NewFont();
enterPressed = true;
operationPressed = false;
operation = "";
maxChar = false;
btn_enter.Focus();
}