/// <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 MulTest()
{
Assert.AreEqual(0, math.Mul(0, 0));
Assert.AreEqual(30, math.Mul(5, 6));
Assert.AreEqual(10, math.Mul(-2, -5));
Assert.AreEqual(-10, math.Mul(2, -5));
Assert.AreEqual(-10, math.Mul(-2, 5));
Assert.AreEqual(0, math.Mul(3516, 0));
Assert.AreEqual(0, math.Mul(0, 3516));
Assert.AreEqual(0.25, math.Mul(0.5, 0.5), Exactness);
Assert.AreEqual(-0.25, math.Mul(-0.5, 0.5), Exactness);
Assert.AreEqual(0.23545135, math.Mul(1, 0.23545135), Exactness);
Assert.AreEqual(200000000, math.Mul(2, 100000000));
Assert.AreEqual(200000000, math.Mul(-2, -100000000));
}