private static void MakeOperation(BasicCalculator calculator, double a, double b, double c, Dictionary <int, MethodInfo> availableOperations, int operation)
{
object[] args = null;
switch (availableOperations[operation].GetParameters().Length)
{
case 0:
args = new object[0];
break;
case 1:
args = new object[] { a };
break;
case 2:
args = new object[] { a, b };
break;
case 3:
args = new object[] { a, b, c };
break;
}
Console.WriteLine(availableOperations[operation].Invoke(calculator, args));
}
private static BasicCalculator PickCalculator(ref Dictionary <int, MethodInfo> availableOperations)
{
Console.WriteLine("Choose the calculator you want to use: \n Press 1 for Calculator \n Press 2 for Special Calculator");
int option = int.Parse(Console.ReadLine());
BasicCalculator calculator = null;
bool optionChosen = true;
while (optionChosen)
{
if (option == 1)
{
calculator = new Calculator();
optionChosen = false;
}
else if (option == 2)
{
calculator = new SpecialCalculator();
optionChosen = false;
}
else
{
Console.WriteLine("Invalid option! Choose again");
}
}
availableOperations = GetOperations(calculator);
return(calculator);
}
static void Main(string[] args)
{
Dictionary <int, MethodInfo> availableOperations = null;
BasicCalculator calculator = PickCalculator(ref availableOperations);
double a, b, c;
(a, b, c) = SetNumberForOperations();
ShowTypedActions();
bool exitWhileLoop = false;
while (!exitWhileLoop)
{
string typedString = Console.ReadLine();
if (string.IsNullOrWhiteSpace(typedString))
{
continue;
}
if (ChosenAction(typedString, new string[] { "C", "(C)" }))
{
calculator = PickCalculator(ref availableOperations);
ShowOperations(availableOperations);
continue;
}
if (ChosenAction(typedString, new string[] { "HELP", "(HELP)" }))
{
ShowOperations(availableOperations);
continue;
}
if (ChosenAction(typedString, new string[] { "QUIT", "(QUIT)" }))
{
exitWhileLoop = true;
continue;
}
if (ChosenAction(typedString, new string[] { "CHANGE", "(CHANGE)" }))
{
(a, b, c) = SetNumberForOperations();
continue;
}
MakeOperation(calculator, a, b, c, availableOperations, int.Parse(typedString));
Console.WriteLine("Try another operation!");
}
Console.WriteLine("To close the application press any key!");
Console.ReadKey();
}
private static Dictionary <int, MethodInfo> GetOperations(BasicCalculator calculator)
{
int i = 1;
Dictionary <int, MethodInfo> keyValuePairs = new Dictionary <int, MethodInfo>();
foreach (MethodInfo property in calculator.GetType().GetMethods())
{
keyValuePairs.Add(i, property);
i++;
}
return(keyValuePairs);
}
