Java 同时循环直到随机滚动选定的数字，将随机放置在何处

在练习while循环时，我试着编写代码，在代码中输入随机数，然后猜测滚动需要多少次，但我不能在while中声明变量“chance”，但如果我将它放在前面，它只会滚动1次

    Random rng = new Random();
    Scanner input = new Scanner(System.in);
    System.out.println("Select a number you want to roll");
    int choice = input.nextInt();
    System.out.println("You feelin' lucky?\nHow many tries until you get " + choice);
    int tries = input.nextInt();
    int count = 0;
    int chance = rng.nextInt((100)+1);
        while (choice != chance) {
            System.out.println(chance);
            count++;

    }
    System.out.println("You won! It only took " + count + " tries.");
}

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如何声明int chance以使其进入while循环？

您可以在while循环中将chance重新分配给一个新值：

int count = 0;
int chance = rng.nextInt((100)+1);
while (choice != chance) {
    System.out.println(chance);
    chance = rng.nextInt((100)+1);
    count++;
}

不要再次声明变量

chance

。只需将其重新分配给一个新值

chance = rng.nextInt((100)+1);

守则中的问题：

循环从不使用

尝试

代码无法确定尝试次数不足以猜测的时间 用户输入的号码

以下内容涉及这些问题：

Random rng = new Random();
Scanner input = new Scanner(System.in);
System.out.println("Select a number you want to roll");
int choice = input.nextInt();
System.out.println("You feelin' lucky?\nHow many tries until you get " + choice);
int tries = input.nextInt();
int count = 1;
int chance = rng.nextInt((100) + 1);

while (tries > 0) {
    System.out.println(chance);
    if (choice == chance)
        break;
    chance = rng.nextInt((100) + 1);
    count++;
    tries--;
}

if (choice == chance) {
    System.out.println("You won! It only took " + count + " tries.");
} else {
    System.out.println("You lost");
}

逻辑：

使用

尝试

确定循环需要运行多少次。 每次运行后将其递减

如果选择和机会相等，那么控制权就会跳出循环

最后一个if条件是确定用户是否能够 在尝试次数内进行猜测

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如果我理解你的问题，我认为你应该使用

do while

循环。它将至少进入循环一次

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你需要在循环中重新分配机会。。。i、 e.

chance=rng.nextInt（101）您知道它可能永远运行吗？
Random rng = new Random();
Scanner input = new Scanner(System.in);
System.out.println("Select a number you want to roll");
int choice = input.nextInt();
System.out.println("You feelin' lucky?\nHow many tries until you get " + choice);
int tries = input.nextInt();
int count = 0;

do {
   int chance = rng.nextInt((100)+1);
   System.out.println(chance);
   count++;
} while (choice != chance)

System.out.println("You won! It only took " + count + " tries.");