Question

我正在做一个我在互联网上发现的模拟游戏“nim”的练习。游戏的想法是让其他玩家拿起最后一个项目。我遇到的问题是在玩家1选择了哪个桩以及从该桩中拾取多少物品之后。最初工作正常，但是当它转到玩家2时，总是选择他之前的玩家堆，无论他们选择哪一堆，它都会从玩家1的同一堆中扣除他们指定的金额。这只发生在我添加了较低的 - if语句中的case选项。有人可以解释为什么它总会选择以前的球员？

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

当您为播放器添加了两个选项时，看起来您复制了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player1s输入，当您应该检查小写字母输入的player2s时：

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

错误在于

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

你应该使用choiceTwo而不是第二个玩家。

while循环w / if语句不会跟随sucesive if语句

3 个答案: