public IActionResult Calculate(string bandAColor, string bandBColor, string bandCColor, string bandDColor)
{
var response = new Models.AjaxResponse();
var ohmResultStr = string.Empty;
if (ModelState.IsValid && bandAColor != null && bandBColor != null && bandCColor != null)
{
var calc = new Models.Calculator();
var ohmResult = calc.CalculateOhmValue(bandAColor, bandBColor, bandCColor, bandDColor);
if (ohmResult != -1)
{
ohmResultStr = ohmResult.ToString() + " ohms";
}
response.Success = true;
response.Data = ohmResultStr;
response.ErrorMessage = null;
}
else
{
response.Success = false;
response.Data = null;
response.ErrorMessage = (!ModelState.IsValid) ? "Invalid model state" : "Please provide required input colors";
}
return(Json(response));
}
public void OhmCalc_RedRedOrangeGoldIs22000_Test()
{
var calc = new Models.Calculator();
var ohmResult = calc.CalculateOhmValue("Red", "Red", "Orange", "Gold");
Assert.IsTrue(ohmResult == 22000);
}
public void OhmCalc_YellowVioletBrownGoldIs470_Test()
{
var calc = new Models.Calculator();
var ohmResult = calc.CalculateOhmValue("Yellow", "Violet", "Brown", "Gold");
Assert.IsTrue(ohmResult == 470);
}
public StandardViewModel()
{
calculator = new Models.Calculator();
memory = new Models.Calculator();
calcDisplay = "0";
action = _NO_ACTION;
}
public void OhmCalc_NullVioletBrownGoldIsMinus1_Test()
{
var calc = new Models.Calculator();
var ohmResult = calc.CalculateOhmValue(null, "Violet", "Brown", "Gold");
Assert.IsTrue(ohmResult == -1);
}
private decimal CalculateResult(Models.Calculator calculator)
{
var result = 0m;
switch (calculator.Operator)
{
case "+":
result = calculator.LeftOperand + calculator.RightOperand;
break;
case "-":
result = calculator.LeftOperand - calculator.RightOperand;
break;
case "/":
result = calculator.LeftOperand / calculator.RightOperand;
break;
case "*":
result = calculator.LeftOperand * calculator.RightOperand;
break;
}
return(result);
}
public ActionResult Index(Models.Calculator calc)
{
if (ModelState.IsValid)
{
calc.Result = calc.getAnswer();
return(RedirectToAction("Answer", calc));
}
// Show the form again (for correction if errors)
return(View(calc));
}
public ActionResult Index()
{
// Create a default Model instance.
Models.Calculator c = new Models.Calculator();
c.CurrentValue = 0;
c.CurrentHistory = "";
c.CurrentOperation = Models.Calculator.Operations.None;
c.LastValue = 0;
c.RunningTotal = 0;
c.FirstOperation = true;
c.DoEqualsRepeat = false;
c.DivideByZero = false;
// Stuff the Model instance into the current session, so we can
// have multiple users using this at the same time.
Session["Model"] = c;
return View(c);
}
public ActionResult Index()
{
// Create a default Model instance.
Models.Calculator c = new Models.Calculator();
c.CurrentValue = 0;
c.CurrentHistory = "";
c.CurrentOperation = Models.Calculator.Operations.None;
c.LastValue = 0;
c.RunningTotal = 0;
c.FirstOperation = true;
c.DoEqualsRepeat = false;
c.DivideByZero = false;
// Stuff the Model instance into the current session, so we can
// have multiple users using this at the same time.
Session["Model"] = c;
return(View(c));
}
public ActionResult Calculate(Models.Calculator calculator)
{
calculator.Result = CalculateResult(calculator);
return(RedirectToAction("Index", calculator));
}
// GET api/values
public int Get([FromUri] MathematicModel input)
{
var ui = new Models.Calculator(_mathematics, input);
return(ui.Calculate());
}
// GET api/values
public int Get([FromUri]MathematicModel input)
{
var ui = new Models.Calculator(_mathematics, input);
return ui.Calculate();
}
public ActionResult Calculator()
{
Calculator viewModel = new Models.Calculator();
return(View(viewModel));
}
public ActionResult Calculate(MathematicModel input)
{
var ui = new Models.Calculator(_mathematics, input);
return View(ui.Calculate());
}
public ActionResult Index(Models.Calculator m)
{
Models.Calculator c = (Models.Calculator)Session["Model"];
/*string[] delims = new string[]{
* " + ",
* " - ",
* " * ",
* " / "
* };*/
// We reset the DivideByZero flag every postback, as the postback
// might solve the problem and we don't want to display the message
// if that's the case. In addition, other parts of the following
// code blocks rely on the DivideByZero flag being false to do
// their jobs.
c.DivideByZero = false;
if (ModelState.IsValid)
{
// Handle each button/action separately.
if (Request.Form["Divide"] != null)
{
// Turn off the flag for repeating equals. If this flag is
// still enabled when we hit Equals again, math will not
// happen correctly.
c.DoEqualsRepeat = false;
// Record the last value as the currently provided number.
c.LastValue = m.CurrentValue;
if (!c.FirstOperation)
{
// If this is not the first operation that has been
// triggered, perform the actual math for the prior
// operation.
c.PerformCalculation();
}
else
{
// If this is the first operation that has been
// triggered, we do not want to do any math yet, we
// want to set up the running total and toggle the
// FirstOperation flag for the next operation.
c.RunningTotal = c.LastValue;
c.FirstOperation = false;
}
if (!c.DivideByZero)
{
// If we did not have a divide-by-zero error, or it's
// the first operation that's been triggered, set the
// current operation, set up the display for the
// current value, and add to the operation history.
c.CurrentOperation = Models.Calculator.Operations.Divide;
c.CurrentValue = c.RunningTotal;
c.CurrentHistory += c.LastValue + " / ";
}
}
else if (Request.Form["Multiply"] != null)
{
c.DoEqualsRepeat = false;
c.LastValue = m.CurrentValue;
if (!c.FirstOperation)
{
c.PerformCalculation();
}
else
{
c.RunningTotal = c.LastValue;
c.FirstOperation = false;
}
if (!c.DivideByZero)
{
c.CurrentOperation = Models.Calculator.Operations.Multiply;
c.CurrentValue = c.RunningTotal;
c.CurrentHistory += c.LastValue + " * ";
}
}
else if (Request.Form["Plus"] != null)
{
c.DoEqualsRepeat = false;
c.LastValue = m.CurrentValue;
if (!c.FirstOperation)
{
c.PerformCalculation();
}
else
{
c.RunningTotal = c.LastValue;
c.FirstOperation = false;
}
if (!c.DivideByZero)
{
c.CurrentOperation = Models.Calculator.Operations.Add;
c.CurrentValue = c.RunningTotal;
c.CurrentHistory += c.LastValue + " + ";
}
}
else if (Request.Form["Minus"] != null)
{
c.DoEqualsRepeat = false;
c.LastValue = m.CurrentValue;
if (!c.FirstOperation)
{
c.PerformCalculation();
}
else
{
c.RunningTotal = c.LastValue;
c.FirstOperation = false;
}
if (!c.DivideByZero)
{
c.CurrentOperation = Models.Calculator.Operations.Subtract;
c.CurrentValue = c.RunningTotal;
c.CurrentHistory += c.LastValue + " - ";
}
}
else if (Request.Form["Reciprocate"] != null)
{
c.DoEqualsRepeat = false;
if (0 == m.CurrentValue)
{
// If the user tried to reciprocate 0, tell him/her no.
c.CurrentValue = m.CurrentValue;
c.DivideByZero = true;
}
else
{
// We reciprocate the number in-place.
c.CurrentValue = 1 / m.CurrentValue;
// This is a bit buggy, disabled for now.
/*string[] split = c.CurrentHistory.Split(delims, StringSplitOptions.None);
*
* if (0 == split[split.Length - 1].Length)
* {
* c.CurrentHistory += "reciproc(" + m.CurrentValue + ")";
* }
* else
* {
* c.CurrentHistory = c.CurrentHistory.Replace(split[split.Length - 1], "reciproc(" + split[split.Length - 1] + ")");
* }*/
}
}
else if (Request.Form["Percentage"] != null)
{
c.DoEqualsRepeat = false;
// The Windows calculator performs the percentage operator
// like such (we do this in-place):
c.CurrentValue = (c.RunningTotal / 100) * m.CurrentValue;
}
else if (Request.Form["SquareRoot"] != null)
{
c.DoEqualsRepeat = false;
// We do the square root in-place.
c.CurrentValue = (double)Math.Sqrt((double)m.CurrentValue);
}
else if (Request.Form["Equals"] != null)
{
double temp;
if (!c.DoEqualsRepeat)
{
// If this is not a repeat equals press, we'll perform
// the initial calculation as normal using the running
// total.
c.LastValue = m.CurrentValue;
temp = c.RunningTotal;
}
else
{
// If this is a repeat equals press, we want to perform
// the last mathematical operation again on the current
// value.
temp = m.CurrentValue;
}
// The following is a special modificiation of the function
// PerformCalculation in the Calculator Model.
switch (c.CurrentOperation)
{
case Models.Calculator.Operations.Add:
temp += c.LastValue;
break;
case Models.Calculator.Operations.Subtract:
temp -= c.LastValue;
break;
case Models.Calculator.Operations.Multiply:
temp *= c.LastValue;
break;
case Models.Calculator.Operations.Divide:
if (0 == c.LastValue)
{
c.DivideByZero = true;
break;
}
temp /= c.LastValue;
break;
case Models.Calculator.Operations.None:
temp = c.LastValue;
break;
}
if (!c.DivideByZero)
{
// If we did not divide by zero, clear the running
// total so we do not encounter problems later. Set the
// equals repeat flag in case the user hits Equals
// again. Wipe out the operation history and reset the
// FirstOperation flag, and return the resultant
// calculation back to the View.
c.RunningTotal = 0;
c.DoEqualsRepeat = true;
c.CurrentHistory = "";
c.FirstOperation = true;
c.CurrentValue = temp;
}
}
else if (Request.Form["MemoryClear"] != null)
{
c.DoEqualsRepeat = false;
c.MemoryStore = 0;
}
else if (Request.Form["MemorySave"] != null)
{
c.DoEqualsRepeat = false;
c.LastValue = m.CurrentValue;
c.MemoryStore = c.LastValue;
c.CurrentValue = m.CurrentValue;
}
else if (Request.Form["MemoryRecall"] != null)
{
c.DoEqualsRepeat = false;
c.CurrentValue = c.MemoryStore;
}
else if (Request.Form["MemoryAdd"] != null)
{
c.DoEqualsRepeat = false;
c.LastValue = m.CurrentValue;
c.MemoryStore += c.LastValue;
c.CurrentValue = m.CurrentValue;
}
else if (Request.Form["MemorySubtract"] != null)
{
c.DoEqualsRepeat = false;
c.LastValue = m.CurrentValue;
c.MemoryStore -= c.LastValue;
c.CurrentValue = m.CurrentValue;
}
else if (Request.Form["Clear"] != null)
{
// This is literally just a reset of the entire state of
// the calculator with the exception of the Memory storage.
c.DoEqualsRepeat = false;
c.FirstOperation = true;
c.DivideByZero = false;
c.CurrentValue = 0;
c.RunningTotal = 0;
c.LastValue = 0;
c.CurrentHistory = "";
c.CurrentOperation = Models.Calculator.Operations.None;
}
}
ModelState.Clear();
return(View(c));
}
public ActionResult Answer(Models.Calculator calc)
{
return(View(calc));
}
public PostfixCalculatorViewModel() : base()
{
_Model = new Models.Calculator();
NumericButtonPress = new DelegateCommand(NumericButtonPressed, CanIssueCommand);
}
// GET: Home
public ActionResult Index(string param)
{
Calculator calc = new Models.Calculator();
ViewBag.Param = param;
return View(calc);
}
public ActionResult Index(Models.Calculator calculator)
{
return(View(calculator));
}
public ActionResult Calculate(MathematicModel input)
{
var ui = new Models.Calculator(_mathematics, input);
return(View(ui.Calculate()));
}
