// Compute new value given operator and operand
public void Compute(char @operator, int operand)
{
// Create command operation and execute it
var command = new CalculatorCommand(calculator, @operator, operand);
command.Execute();
// Add command to undo list
commands.Add(command);
current++;
}
// Compute new value given operator and operand
public void Compute(char @operator, int operand)
{
// Create command operation and execute it
ICommand command = new CalculatorCommand(
_calculator, @operator, operand);
command.Execute();
// Add command to undo list
_commands.Add(command);
_current++;
}