/// <summary>
/// Reset all parameters for arithmetic operation to their original state
/// </summary>
public static void Clear(ref CalcOperationParam Cop)
{
Cop.leftOp = 0;
Cop.rightOp = Double.NaN;
Cop.operation = TypeOperation.None;
Cop.result = "0";
Cop.history = "";
}
/// <summary>
/// Execute of calculator operations by using parameters of arithmetic operation
/// </summary>
/// <param name="parameter"></param>
public static void Calc(ref CalcOperationParam Cop)
{
try
{
if (Double.TryParse(Cop.arg, out double num)) // number
{
if (Cop.operation == TypeOperation.None)
{
Cop.leftOp = Cop.leftOp * 10 + num;
}
else
if (double.IsNaN(Cop.rightOp))
{
Cop.rightOp = num;
}
else
{
Cop.rightOp = Cop.rightOp * 10 + num;
}
}
else // operation
{
Cop.arg = CalcSymbol.TransformationArg(Cop.arg); // Transformation of operation symbol into one of the elements of TypeOperation
if ((TypeOperation)Enum.Parse(typeof(TypeOperation), Cop.arg) == TypeOperation.Equally)
{
Calculate(ref Cop);
}
else if ((TypeOperation)Enum.Parse(typeof(TypeOperation), Cop.arg) == TypeOperation.ClearAll)
{
Clear(ref Cop);
}
else // "+" "-" "*" "/"
{
if (!double.IsNaN(Cop.rightOp))
{
Calculate(ref Cop);
}
Cop.operation = (TypeOperation)Enum.Parse(typeof(TypeOperation), Cop.arg);
}
}
Cop.result =
Cop.leftOp.ToString() +
CalcSymbol.Operation[Cop.operation].Symbol;
if (!Double.IsNaN(Cop.rightOp))
{
Cop.result += Cop.rightOp.ToString();
}
}
catch (DivideByZeroException)
{
Clear(ref Cop);
Cop.history = "Division by zero is impossible";
}
}
/// <summary>
/// Calculation of the arithmetic operation
/// </summary>
private static void Calculate(ref CalcOperationParam Cop)
{
if (!double.IsNaN(Cop.rightOp))
{
Cop.history =
Cop.leftOp.ToString() +
CalcSymbol.Operation[Cop.operation].Symbol +
Cop.rightOp.ToString() +
CalcSymbol.Operation[TypeOperation.Equally].Symbol;
Cop.leftOp = CalcSymbol.Operation[Cop.operation].Calc(Cop.leftOp, Cop.rightOp);
Cop.rightOp = Double.NaN;
Cop.operation = TypeOperation.None;
}
}
