/// <summary>
/// Gets digit's reference
/// </summary>
/// <param name="key">The character of the digit</param>
/// <returns>Given digit's reference</returns>
public Digit GetDigit(char key)
{
Digit digit = null;
if (this.digits.ContainsKey(key))
{
digit = this.digits[key];
}
else
{
switch (key)
{
case '0':
digit = new Digit0();
break;
case '1':
digit = new Digit1();
break;
case '2':
digit = new Digit2();
break;
case '3':
digit = new Digit3();
break;
case '4':
digit = new Digit4();
break;
case '5':
digit = new Digit5();
break;
case '6':
digit = new Digit6();
break;
case '7':
digit = new Digit7();
break;
case '8':
digit = new Digit8();
break;
case '9':
digit = new Digit9();
break;
}
this.digits.Add(key, digit);
}
return(digit);
}
public string FinalOutPut()
{
return(Digit1.ToString() + Digit2.ToString() + Digit3.ToString() + Digit4.ToString());
}