public double Calculate(CalcOperations argOperation, double argFirstNumber, double argSecondNumber)
{
double resultOperation = 0;
switch (argOperation)
{
case CalcOperations.Add:
resultOperation = argFirstNumber + argSecondNumber;
break;
case CalcOperations.Subtract:
resultOperation = argFirstNumber - argSecondNumber;
break;
case CalcOperations.Divide:
resultOperation = argFirstNumber / argSecondNumber;
break;
case CalcOperations.Multiply:
resultOperation = argFirstNumber * argSecondNumber;
break;
default:
throw new InvalidOperationException("Specified operation is note recognized");
}
return(resultOperation);
}
private void OperationOnNumber(CalcOperations op)
{
if (lastOperation == true)
{
calculation();
}
switch (op)
{
case CalcOperations.DIVIDE:
this.op = CalcOperations.DIVIDE;
break;
case CalcOperations.MULTIPLICATION:
this.op = CalcOperations.MULTIPLICATION;
break;
case CalcOperations.SUBSTRACTION:
this.op = CalcOperations.SUBSTRACTION;
break;
case CalcOperations.ADDITION:
this.op = CalcOperations.ADDITION;
break;
}
if (this.op != CalcOperations.NONE)
{
Events.current.onDisplayResultUp(OperationResult());
}
lastOperation = true;
}
private void ResetAll()
{
op = CalcOperations.NONE;
firstNumber = 0;
lastNumber = 0;
resetNum = false;
lastOperation = false;
}
// sqrt 1/x +-
private void oneOperandOperationBtnPressed(object param)
{
string oper = param.ToString();
if (isCalcEnabled)
{
isOpEnded = true;
InputLength = 0;
isEqBtnPressedLast = false;
switch (oper)
{
case ("r"):
Stack += "sqrt(" + Input + ")";
Input = CalcOperations.root(Input);
isCalcEnabled = ValidateOutput(Input);
break;
case ("-1"):
Stack += "reciproc(" + Input + ")";
Input = CalcOperations.inv(Input);
isCalcEnabled = ValidateOutput(Input);
break;
case ("+-"):
if (Input.Contains("-"))
{
Input = Input.Trim('-');
}
else
{
if (Input != "0")
{
string buf = Input;
Input = "-";
Input += buf;
}
}
break;
case ("%"):
if (FirstN == "")
{
Input = "0";
}
else
{
Input = CalcOperations.percent(FirstN, Input);
}
Stack += Input;
break;
default:
break;
}
}
}
public void DivideByZeroTest()
{
//Arrange
double num1 = 550;
double num2 = 0;
CalcOperations calc = new CalcOperations();
//Act & Assert
Assert.ThrowsException <DivideByZeroException>(() => calc.Divide(num1, num2));
}
public void SubtractTest()
{
//Arrange
double num1 = 550;
double num2 = 2300;
double expected = -1750;
CalcOperations calc = new CalcOperations();
//Act
double actual = calc.Subtract(num1, num2);
//Assert
Assert.AreEqual(expected, actual);
}
public void MultiplyTest()
{
//Arrange
double num1 = 55;
double num2 = 2.3;
double expected = 126.49999999999999;
CalcOperations calc = new CalcOperations();
//Act
double actual = calc.Multiply(num1, num2);
//Assert
Assert.AreEqual(expected, actual);
}
public void DivideTest()
{
//Arrange
double num1 = 550;
double num2 = 2;
double expected = 275;
CalcOperations calc = new CalcOperations();
//Act
double actual = calc.Divide(num1, num2);
//Assert
Assert.AreEqual(expected, actual);
}
public void AddTest()
{
//Arrange
double num1 = 550;
double num2 = 550;
double expected = 1100;
CalcOperations calc = new CalcOperations();
//Act
double actual = calc.Add(num1, num2);
//Assert
Assert.AreEqual(expected, actual);
}
public void EqualsAddTest()
{
//Arrange
double num1 = 550;
double num2 = 550;
string operand = "+";
double expected = 1100;
CalcOperations calc = new CalcOperations();
//Act
double actual = calc.Equal(num1, operand, num2);
//Assert
Assert.AreEqual(expected, actual);
}
public void EqualsDivideTest()
{
//Arrange
double num1 = 550;
double num2 = 2;
double expected = 275;
string operand = "/";
CalcOperations calc = new CalcOperations();
//Act
double actual = calc.Equal(num1, operand, num2);
//Assert
Assert.AreEqual(expected, actual);
}
public void EqualsMultiplyTest()
{
//Arrange
double num1 = 55;
double num2 = 2.3;
double expected = 126.49999999999999;
string operand = "*";
CalcOperations calc = new CalcOperations();
//Act
double actual = calc.Equal(num1, operand, num2);
//Assert
Assert.AreEqual(expected, actual);
}
public void EqualsSubtractTest()
{
//Arrange
double num1 = 550;
double num2 = 2300;
double expected = -1750;
string operand = "-";
CalcOperations calc = new CalcOperations();
//Act
double actual = calc.Equal(num1, operand, num2);
//Assert
Assert.AreEqual(expected, actual);
}
private void HandleOperations(CalcOperations co)
{
try
{
int val1 = int.Parse(txtFirstNum.Text);
int val2 = int.Parse(txtSecondNum.Text);
switch (co)
{
case CalcOperations.Add:
lstResult.Items.Add($"{val1} + {val2} = {val1 + val2}");
break;
case CalcOperations.Subtract:
lstResult.Items.Add($"{val1} - {val2} = {val1 - val2}");
break;
case CalcOperations.Multiply:
lstResult.Items.Add($"{val1} x {val2} = {val1 * val2}");
break;
case CalcOperations.Divide:
lstResult.Items.Add($"{val1} / {val2} = {val1 / val2}");
break;
}
txtFirstNum.Text = "";
txtSecondNum.Text = "";
// The following 2 lines are to try and focus the closest line in the result for screenreader users after calculation
lstResult.SelectedItem = lstResult.Items[lstResult.Items.Count - 1];
lstResult.Focus();
}
catch (DivideByZeroException)
{
lblErrMsg.Content = "Felaktigt värde, du försöker dividera med 0!";
lblErrMsg.Visibility = Visibility.Visible;
// We set focus on this for screenreader users, it goes away when it looses focus
lblErrMsg.Focus();
}
catch (FormatException)
{
lblErrMsg.Content = "Felaktigt värde, ange enbart siffror!";
lblErrMsg.Visibility = Visibility.Visible;
// We set focus on this for screenreader users, it goes away when it looses focus
lblErrMsg.Focus();
}
}
//calculates result
private string Calculate(string operation, string input)
{
if (LastOp == "" || !isNumbBtnPressedLast)
{
LastOp = operation;
FirstN = input;
return(FirstN);
}
else
{
SecondN = input;
switch (LastOp)
{
case ("+"):
FirstN = CalcOperations.plus(FirstN, SecondN);
LastOp = operation;
return(FirstN);
case ("-"):
FirstN = CalcOperations.minus(FirstN, SecondN);
LastOp = operation;
return(FirstN);
case ("*"):
FirstN = CalcOperations.mult(FirstN, SecondN);
LastOp = operation;
return(FirstN);
case ("/"):
FirstN = CalcOperations.div(FirstN, SecondN);
LastOp = operation;
return(FirstN);
default:
return("Invalid input");
}
}
}
public void OperationClick(CalcOperations op) => onCalcOperation(op);