在一维战舰游戏Java中实现第二艘船

Question

我设计的战舰游戏只隐藏了一艘船，现在我必须在游戏中实现另一艘船。我是 Java 新手，想知道是否有人可以为我提供一个简单的方法来解决这个问题。我需要创建其他方法还是只调整显示河流方法？

        public static void displayRiver(int[] river, boolean showShip) {
            System.out.println();
            System.out.print("|");
            for (int val : river) {
                switch (val) {
                    case -1: // No Ship
                    System.out.print("x");
                    break;
                    case 0: // Unknown
                    System.out.print(" ");
                    break;
                    case 1: // Ship Found
                    System.out.print(showShip ? "Y" : " ");
                    break;
                }//switch
                System.out.print("|");
            }//for
            System.out.println();
            System.out.println();
        }//displayRiver
    
        // main method
        public static void main(String[] arg) {
            int riverLength = promptForInt("Please, enter the river lenght"); 
            int [] shipArray = new int[riverLength]; 
         
            int randomBattleshipLocation = new Random().nextInt(riverLength); 
            shipArray[randomBattleshipLocation] = 1; 
         
            boolean showShip = false ; 
            int userGuess; 
    
            do
            {
                displayRiver (shipArray, false);
                userGuess = promptForInt(String.format("Guess, enter a location from 1 to " + riverLength));
                userGuess = userGuess -1; 
    
                if(shipArray[userGuess] == 1) 
                {
                    System.out.println("Boom! ");
                    showShip = true; 
                    displayRiver(shipArray, true);
                }
                else if(shipArray[userGuess] == -1)
                {
                    System.out.println("Location was already hit, try again! ");
                }
                else if(shipArray[userGuess] == 0) 
                {
                    System.out.println("Splash...");
                    shipArray[userGuess] = -1 ; 
                }
    
            } while(!showShip); 
    
            System.exit(0);
    
        }
    }

Answer 1

您的逻辑似乎是数组中的1 表示一艘船，而您的船显然不超过一宽。

您目前使用以下内容创建一个船

int randomBattleshipLocation = new Random().nextInt(riverLength); 
shipArray[randomBattleshipLocation] = 1;

因此，您可以将其转换为创建战舰的方法，然后为多艘战舰调用任意次数。只要确保你没有将一艘船分配到另一艘船的顶部，或者犯另一个逻辑错误（比如试图将 5 艘船放入一条大小为 4 的河流中，它会永远循环尝试为船只寻找空间）。

伪代码和非伪代码：

for(int i = 0;i < shipsToAdd; i++) {
    addShip(shipArray);
}

// Use a shared class-level Random object, don't do new Random().nextInt();
private static Random rnd = new Random();
private static addShip(int[] array) {
    // Here you should loop to check if the array is already full of ships
    // otherwise it's a design flaw that will result in an infinite loop with bad input

    // loop until we find a shipless array index
    int index = rnd.nextInt(array);
    while(array[index] == 1)
       index = rnd.nextInt(array);
    array[index] = 1;
}