Question

我还是新手，我在这个项目中遇到了困难。我需要洗牌并获得前四张牌并计算四张牌的总和。到目前为止，我已经完成了这项任务。现在我的问题是我需要重复这个方法，直到我得到24的总和。我很难知道如何循环该方法。这是我到目前为止所做的代码：

public class cards
{
    public static void main(String[] args)
    {
       int[] deck = new int[52];
       String[] suits = {"Spades", "Hearts", "Diamonds", "Clubs"};
       String[] ranks = {"Ace", "2", "3", "4", "5", "6", "7", "8", "9", "10", "Jack", "Queen", "King"};
       int rankedVal[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13};
       int tot = 0;
            if (tot != 24){  
       //Initialize cards
    tot = 0;
   for (int i = 0; i < deck.length; i++)
        deck[i] = i;



   //Shuffle cards    
    for (int i = 0; i < deck.length; i++)
   {
        int index = (int)(Math.random() * deck.length);
        int temp = deck[i];
        deck[i] = deck[index];
        deck[index] = temp;
   }

    //Display first four                
    for (int i = 0; i < 4; i++)
   {
        String suit = suits[deck[i] / 13];
        String rank = ranks[deck[i] % 13];
        System.out.println("Card number " + deck[i] + ": " + rank + " of " + suit);
   }  

     //find the total 
           for (int i = 0; i<4;i++){
        tot = tot + rankedVal[deck[i] % 13];
    }


 System.out.println("Total Hand = " + tot);
}
}

}

Answer 1

我将使用更通用的代码，因为不同的表示适合不同的程序员，但这应该适用于任何事情：

int sum = 0;
While (sum != 24)
{
    Shuffle();
    sum = deck[0].value + deck[2].value + deck[3].value + deck[4].value;
}

如果你制作牌组并在洗牌时在牌组之间进行交换会更好，并且牌里面有一个整数值。初始化一次然后它们都交换对象。这是Java，不是吗？

Answer 2

如果没有制作扰流板，您可以在while循环中使用条件，直到达到24，如：

do
{
    // Get 4 cards and add sum.
 } while (sum < 24);

另外你需要检查一下你的卡片用完了，所以改进了：

int cardsUsed = 0
do
{
   // Get 4 cards and add sum.
   cardsUsed += 4;
} ((sum < 24) or (cards_used >= 52));

Answer 3

这就是为什么你应该学习如何使用方法和子程序。如果您使用的是Java，那么您首先应该先了解一下面向对象编程。如果您不了解OOP，我不会推荐Java作为初学者语言。也许去C或Python。

public class cards
{
    int[] deck = new int[52];
    String[] suits = {"Spades", "Hearts", "Diamonds", "Clubs"};
    String[] ranks = {"Ace", "2", "3", "4", "5", "6", "7", "8", "9", "10", "Jack", "Queen", "King"};
    int rankedVal[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13};

    void init() {
       // initialise logic
       for (int i = 0; i < deck.length; i++)
           deck[i] = i;
    }

    void shuffleCards() {
       for (int i = 0; i < deck.length; i++) {
        // Shuffle logic
       }
    }

    void displayFirstFour() {
       // display logic
    }

    int sumFirstFour() {
      int sum = 0;
      // logic to sum first four cards
      return sum;
    }

    public static void main(String[] args)
    {
       init();
       int total = 0;
       // LOOP. NOT 'if' . 'if' simply tests condition once and moves on
       // loop tests condition continually until true
       while(total != 24) {
         //Shuffle cards    
         shuffleCards();  
         //Display first four                
         displayFirstFour();
         total = sumFirstFour();
       }
       System.out.println("Total Hand = " + total);
    }
}

洗牌一副牌直到得到一个特定的号码

3 个答案: