public void Add(char mathOperator, int value)
{
Commander command = new CalculatorCommand(_calculator, mathOperator, value);
command.Run();
_commands.Add(command);
_total++;
}
public void Compute(char operatorKey, int operand)
{
//Create commmand and execute
Command command = new CalculatorCommand(_calculator, operatorKey, operand);
command.Execute();
//Add command to undo list
_commands.Add(command);
_current++;
}