带 if 语句的 While 循环不会跟随连续的 if 语句

Question

我正在做一个在 Internet 上找到的练习来模拟游戏 "nim"。游戏的想法是让其他玩家拿起最后一件物品。我遇到的问题是在玩家 1 选择要从哪个堆中挑选以及从该堆中挑选多少物品之后。最初这很好，但是当轮到玩家 2 时，总是选择他之前的玩家堆，而不管他们选择的堆，它从与玩家 1 相同的堆中扣除他们指定的数量。这只发生在我添加了较低的 - if 语句中的 case 选项。有人能解释一下为什么它总是选择前面的玩家堆吗？

while(pileA > 0 || pileB > 0 || pileC > 0){
    System.out.println(playerOne+", which pile would you like to pick from?");
    String choice = input.next();
    System.out.println("How many cards would you like to take from pile "+choice+"?");
    int amount = input.nextInt();
    if(choice.equals("A") || choice.equals("a")){
        pileA = pileA - amount;
        System.out.println("A: "+pileA+"   B: "+pileB+"   C: "+pileC);
    }
    else if(choice.equals("B") || choice.equals("b")){
        pileB = pileB - amount;
        System.out.println("A: "+pileA+"   B: "+pileB+"   C: "+pileC);
    }
    else if(choice.equals("C") || choice.equals("c")){
        pileC = pileC - amount;
        System.out.println("A: "+pileA+"   B: "+pileB+"   C: "+pileC);
    }
    else{
        System.out.println("ERROR");
    }



    System.out.println(playerTwo+", which pile would you like to pick from?");
    String choiceTwo = input.next();
    System.out.println("How many cards would you like to take from pile "+choiceTwo+"?");
    amount = input.nextInt();
    if(choiceTwo.equals("A") || choice.equals("a")){
        pileA = pileA - amount;
        System.out.println("A: "+pileA+"   B: "+pileB+"   C: "+pileC);
    }
    else if(choiceTwo.equals("B") || choice.equals("b")){
        pileB = pileB - amount;
        System.out.println("A: "+pileA+"   B: "+pileB+"   C: "+pileC);
    }
    else if(choiceTwo.equals("C") || choice.equals("c")){
        pileC = pileC - amount;
        System.out.println("A: "+pileA+"   B: "+pileB+"   C: "+pileC);
    }
    else{
        System.out.println("ERROR");
    }
    }

Answer 1

当您为播放器添加两个选项时，您似乎复制了 if 语句并忘记将小写选项的 choice.equals 转换为 choiceTwo.equals

if(choiceTwo.equals("A") || choiceTwo.equals("a")){
        pileA = pileA - amount;
        System.out.println("A: "+pileA+"   B: "+pileB+"   C: "+pileC);
}
else if(choiceTwo.equals("B") || choiceTwo.equals("b")){
        pileB = pileB - amount;
        System.out.println("A: "+pileA+"   B: "+pileB+"   C: "+pileC);
}
else if(choiceTwo.equals("C") || choiceTwo.equals("c")){
        pileC = pileC - amount;
        System.out.println("A: "+pileA+"   B: "+pileB+"   C: "+pileC);
}

Answer 2

您正在检查 player1 的输入，而您应该检查 player2 的小写输入：

if(choiceTwo.equals("A") || choice.equals("a")){ // should be || choiceTwo.equals("a")
    pileA = pileA - amount;
    System.out.println("A: "+pileA+"   B: "+pileB+"   C: "+pileC);
}
else if(choiceTwo.equals("B") || choice.equals("b")){ // should be || choiceTwo.equals("b")
    pileB = pileB - amount;
    System.out.println("A: "+pileA+"   B: "+pileB+"   C: "+pileC);
}
else if(choiceTwo.equals("C") || choice.equals("c")){ // should be || choiceTwo.equals("c")
    pileC = pileC - amount;
    System.out.println("A: "+pileA+"   B: "+pileB+"   C: "+pileC);
}

Answer 3

错误在

       if(choiceTwo.equals("A") || choice.equals("a")){
    pileA = pileA - amount;

你应该使用 choiceTwo 而不是第二个玩家的选择。

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