/// <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 DivTest()
{
Assert.AreEqual(0, math.Div(0, 5));
Assert.AreEqual(1, math.Div(10, 10));
Assert.AreEqual(1, math.Div(-10, -10));
Assert.AreEqual(-1, math.Div(-10, 10));
Assert.AreEqual(-1, math.Div(10, -10));
Assert.AreEqual(-5, math.Div(-100000000, 20000000));
Assert.AreEqual(0.5, math.Div(1, 2), Exactness);
Assert.AreEqual(-0.625, math.Div(-5, 8), Exactness);
Assert.AreEqual(0.5, math.Div(128, 256));
Assert.AreEqual(6.4127039, math.Div(42.6541, 6.6515), Exactness);
Assert.AreEqual(4, math.Div(1, 0.25), Exactness);
/// <summary> divided by zero</summary>
string noFailMessage = "No exception message after dividing by zero.";
try
{
math.Div(2, 0);
Assert.Fail(noFailMessage);
}
catch (Exception)
{
}
}