private void HandleDigitCommand(DigitCommand digitCommand)
        {
            // Scenarios
            // If accumulator has zero and digit is zero then ignore.
            // If accumulator has zero and digit is non zero, then replace
            // Else append
            var cpu = this.Calculator.CPU;

            if (cpu.Accumulator.ToString() == "0" && digitCommand.Digit == 0)
            {
                return;
            }
            if (cpu.Accumulator.ToString() == "0" && digitCommand.Digit != 0)
            {
                cpu.Accumulator.SetValue(digitCommand.Digit);
            }
            else
            {
                cpu.Accumulator.Append(digitCommand.Digit.ToString());
            }
        }
Пример #2
0
 private void RaiseAllCanExecute()
 {
     DigitCommand.RaiseCanExecuteChanged();
     ClearCommand.RaiseCanExecuteChanged();
     SubmitCommand.RaiseCanExecuteChanged();
 }