/// <summary>
/// Does the math operation.
/// </summary>
private void do_math_operation()
{
/// <sumamry> Variable lastOperator stores last operation which will be performed </summary>
switch (lastOperator)
{
case "+":
operand1 = Math.Add(operand1, dispString_to_numb(display.Text));
break;
case "-":
operand1 = Math.Add(operand1, -(dispString_to_numb(display.Text)));
break;
case "*":
operand1 = Math.Mul(operand1, dispString_to_numb(display.Text));
break;
case "/":
operand1 = Math.Div(operand1, dispString_to_numb(display.Text));
break;
case "power":
operand1 = Math.Pow(operand1, dispString_to_numb(display.Text));
break;
case "root":
operand1 = Math.Root(operand1, dispString_to_numb(display.Text));
break;
case "log":
operand1 = Math.Log(dispString_to_numb(display.Text), operand1);
break;
default:
break;
}
}
public void RootTest()
{
Assert.AreEqual(0, math.Root(0, 42));
Assert.AreEqual(0, math.Root(0, 0.5), Exactness);
Assert.AreEqual(2, math.Root(32, 5));
Assert.AreEqual(0.5, math.Root(8, -3), Exactness);
Assert.AreEqual(500, math.Root(3.2768e-41, -15), Exactness);
Assert.AreEqual(2.5, math.Root(15.625, 3), Exactness);
Assert.AreEqual(25, math.Root(0.000064, -3), Exactness);
Assert.AreEqual(2, math.Root(1024, 10));
Assert.AreEqual(10, math.Root(0.1, -1), Exactness);
Assert.AreEqual(1, math.Root(1, 42));
Assert.AreEqual(100000000, math.Root(100000000, 1));
/// <summary> NaN result</summary>
string noFailMessage = "No exception message when result was NaN.";
try
{
math.Root(-1, 10);
Assert.Fail(noFailMessage);
}
catch (Exception)
{
}
try
{
math.Root(0, -1);
Assert.Fail(noFailMessage);
}
catch (Exception)
{
}
}