除第二个语句外，所有条件都可以正常工作，如何纠正此问题？

Question

我正在学习java，我不知道是什么使我的代码不阅读我的其他条件（i == 5），

int i;    
for (i = 1; i <= 5; i++) {
    int guess = scanner.nextInt();
    System.out.println("Attempt: " + i +"/5");
    if (guess < numberToGuess) {
        System.out.println("Higher");
    } else if (guess > numberToGuess) {
            System.out.println("Lower");
    } else if (i == 5) {
        System.out.println("You failed! The correct answer is " + numberToGuess);
    } else {
        System.out.println("You won! Your answer is " + numberToGuess + " which is correct!");
        break;
    }

当我运行代码并尝试通过达到最大int i的最大int i（5是5 ） ，第二个如果要出现语句，但它不起作用。

我只是不明白为什么它没有阅读（i == 5）条件，除此之外，所有其他条件都在起作用。

Answer 1

使用IF-ELSE语句时的拇指规则是
将对最早的感到满意，它将进入该声明，
之后，它将在IF-ELSE条件之外执行代码。

因此，就您而言，如果else语句效法
满足陈述，其余的人都被忽略了。拿
作为一个例子。

if (guess < numberToGuess) {
     System.out.println("Higher"); } else if (guess > numberToGuess) {
     System.out.println("Lower"); } else if (i == 5) {
     System.out.println("You failed! The correct answer is " + numberToGuess); } else {
     System.out.println("You won! Your answer is " + numberToGuess + " which is correct!");
    break; }

即使i == 5，数字或猜测＆gt;
满足了numberToguess，它将执行这些而不是执行
i == 5。
因此，请考虑一下您想给予更多优先级的逻辑。

Answer 2

好吧，如果else语句会这样起作用：当满足任何一个语句时，其余的人都将被忽略。以您的榜样为例。

if (guess < numberToGuess) {
    System.out.println("Higher");
} else if (guess > numberToGuess) {
    System.out.println("Lower");
} else if (i == 5) {
    System.out.println("You failed! The correct answer is " + numberToGuess);
} else {
    System.out.println("You won! Your answer is " + numberToGuess + " which is correct!");
    break;
}

即使i == 5，如果猜测＆lt; numberToguess或猜测＆gt;满足了numberToguess，其余语句（包括）（i == 5）被忽略。

要解决此问题，只需将i == 5作为第一个检查的条件，因为如果i == 5感到满意，我们都不应该考虑猜测。

我还猜想您想在游戏结束时突破循环，因此我还添加了break语句。

if (i == 5) {
    System.out.println("You failed! The correct answer is " + numberToGuess);
    break;
} else if (guess < numberToGuess) {
    System.out.println("Higher");
} else if (guess > numberToGuess) {
    System.out.println("Lower");
}  else {
    System.out.println("You won! Your answer is " + numberToGuess + " which is correct!");
    break;
}

Answer 3

因此，似乎是这样，因为在检查您是否处于正确的循环条件下之前，有

... 
if (guess < numberToGuess) {
            System.out.println("Higher");
        } else if (guess > numberToGuess) {
                System.out.println("Lower");
        } 
....

执行变量的检查。因此，要修复错误，只需将检查i == 5移至第一个分支条款即可。代码应像接下来一样，

if (i == 5) {
    System.out.println("You failed! The correct answer is " + numberToGuess);
} else if (guess > numberToGuess) {
    System.out.println("Lower");
} else if (guess < numberToGuess) {
     System.out.println("Higher");
} else {
    System.out.println("You won! Your answer is " + numberToGuess + " which is correct!");
    break;
}

以便您首先检查循环条件并在

Answer 4

这就是如果/else 有效的话，您的价值将比猜测低或更高，因此2个第一个条件将是正确的，那么任何其他人都不会被检查

设置停止起初条件

int nb_tries = 5;
for (i = 1; i <= nb_tries; i++) {
    System.out.print("Attempt: " + i + "/" + nb_tries + " => ");
    int guess = scanner.nextInt();

    if (i == nb_tries) {
        System.out.println("You failed! The correct answer is " + numberToGuess);
    } else if (guess < numberToGuess) {
        System.out.println("Higher");
    } else if (guess > numberToGuess) {
        System.out.println("Lower");
    } else {
        System.out.println("You won! Your answer is " + numberToGuess + " which is correct!");
        break;
    }
}