how to do the card count and how to make the computer add the cards number?

The player have to type D 4 times to choose 4 card (card number1-13).. I don't know how to make the computer count the card and make the computer add the card number to the total pts.. please help...

That's an extremely vague question. You need to provide more details about what you're trying to do, what you don't understand, and what your question is.

The players have to draw 4 cards.... (press d 4 times)
And the cardnumber of each 4 cards is the player turn pts.. (add all the cards number) to get 300 pts to win..
how to make the computer add the number of these 4 cards?
when player press d it just continued giveing the random numbers and its never stop how to make it stop when it get 4 cards?

An integer counter? Increase by 1, and when it hits 4, stop?

Turn that into code that will compile.

Code:

---

public Method()
{
  counter = 0;
  totalNumber = 0;

  while (totalNumber < 300)
  {
  for(int i = 0; i < 4; i++)
      {
        input = console.readline();

        if (input == 'd')
        {
            totalNumber += randomNumber;
        }
      }

      console.writeline("Your total points with 4 more cards is {0}", totalNumber);
  }

  console.writeline("You got to 300");
}

---