// **********
// Entrypoint
// **********
static void Main(string[] args)
{
// ***********************************************************************************
// Fields :
// calculator - RPNArithmetic handles math / management of the stored RPN expressions
// previousCalculation - RPNToken storing previously the previously reduced expression
// userInput - ConsoleKey storing current userInput
// ***********************************************************************************
RPNArithmetic calculator = new RPNArithmetic();
RPNToken previousCalculation = new RPNToken("0");
ConsoleKey userInput;
// **********************
// Console User Interface
// **********************
do
{
DisplayMenu();
userInput = Console.ReadKey().Key;
switch (userInput)
{
case ConsoleKey.A:
Console.WriteLine();
GetRPNExpression(calculator);
break;
case ConsoleKey.L:
Console.WriteLine(
"\n\nThe previous calculation was {0}.", previousCalculation);
break;
case ConsoleKey.C:
CalculateAndDisplay(calculator, out previousCalculation);
break;
case ConsoleKey.S:
calculator.Display();
break;
case ConsoleKey.X:
calculator.Clear();
break;
}
Console.Write("\nPress any key to continue... ");
Console.ReadKey();
}while (userInput != ConsoleKey.Q);
}
private static void CalculateAndDisplay(RPNArithmetic calculator, out RPNToken previousCalculation)
{
previousCalculation = calculator.ReduceStack();
Console.WriteLine("\n\nThe calculated value is {0}.", previousCalculation);
}