public void ProcessOperationButton(string opPressed)
{
CalculationHistory = string.Empty;
if (opPressed != "=")
{
CalculationHistory += OnScreenDisplay;
}
switch (opPressed)
{
case "MC":
MemoryStore = 0;
OnScreenDisplay = MemoryStore.ToString();
break;
case "MR":
Operation = opPressed;
ProcessEqualsButton();
break;
case "M+":
Operation = opPressed;
ProcessEqualsButton();
break;
case "M-":
Operation = opPressed;
ProcessEqualsButton();
break;
case "=":
ProcessEqualsButton();
break;
case "C":
Clear();
break;
case "CE":
ClearEntry();
break;
case "\u232b":
if (OnScreenDisplay.Length > 1)
{
OnScreenDisplay = OnScreenDisplay.Remove(OnScreenDisplay.Length - 1, 1);
}
else
{
OnScreenDisplay = "0";
}
break;
case ",":
AddToCalculationHistory(opPressed);
ProcessDecimalPoint();
break;
case "*":
AddToCalculationHistory(opPressed);
ProcessDualOperandMathOperator(opPressed);
break;
case "/":
AddToCalculationHistory(opPressed);
ProcessDualOperandMathOperator(opPressed);
break;
case "+":
AddToCalculationHistory(opPressed);
ProcessDualOperandMathOperator(opPressed);
break;
case "-":
AddToCalculationHistory(opPressed);
ProcessDualOperandMathOperator(opPressed);
break;
case "\u00b1":
OnScreenDisplay = (-double.Parse(OnScreenDisplay)).ToString();
CalculationHistory = string.Empty;
CalculationHistory += OnScreenDisplay;
break;
case "%":
OnScreenDisplay = (double.Parse(OnScreenDisplay) / 100 * double.Parse(OnScreenDisplay)).ToString();
CalculationHistory = string.Empty;
CalculationHistory += OnScreenDisplay;
break;
case "\u221a":
OnScreenDisplay = ((decimal)Math.Sqrt(double.Parse(OnScreenDisplay))).ToString();
AddToCalculationHistory(opPressed);
break;
case "^2":
OnScreenDisplay = ((decimal)Math.Pow(double.Parse(OnScreenDisplay), 2)).ToString();
AddToCalculationHistory(opPressed);
break;
case "1/x":
if (OnScreenDisplay != "0")
{
OnScreenDisplay = ((decimal)(1 / double.Parse(OnScreenDisplay))).ToString();
}
else
{
OnScreenDisplay = "Няма деление на нула";
}
break;
}
}
