我的程序能够正常工作，但不会打印时它应该是

Question

我是新来的java编程，并正在测试一些我学到的东西，以便做出一个小猜谜游戏。它可以工作，你可以通过它，但是当你得到第二个错误的数字后，你不会被告知你这个数字是低还是高。这是问题的一个例子：

Guess a number, 1 through 100: 
50 
Guess higher! 
75 
75 
Guess lower! 
65 
65 
Guess lower! 

这里是代码：如果块

public static void main(String[] args) { 
    Random num = new Random(); 
    Scanner scan = new Scanner(System.in); 
    int rand; 
    boolean test; 
    int rand2; 
    int guess = 0; 

    rand = num.nextInt(100); 
    System.out.println("Guess a number, 1 through 100: "); 
    while(test = true){ 
     rand2 = scan.nextInt(); 
     if(rand == rand2){ 
      guess++; 
      if(guess < 19){ 
       System.out.println("Thats the correct number! And it only took: " + guess + " tries"); 
      }else{ 
       System.out.println("It took you: " + guess + " tries to guess the number!"); 
      } 

     }else if(rand < rand2){ 
      System.out.println("Guess lower! "); 
      guess++; 
      rand2 = scan.nextInt(); 
     }else if(rand > rand2){ 
      System.out.println("Guess higher! "); 
      guess++; 
      rand2 = scan.nextInt(); 
     } 
    } 
} 

Answer 1

在别的都删除rand2 = scan.nextInt();并尝试运行它。你的逻辑就像用户输入两次，直到你得到正确的答案。

Answer 2

在进行下一个更低或更高检查之前，您正在扫描另一个数字两次。一旦进入if语句，另一个进入while循环的顶部。尝试删除if/else语句中的scan.nextInt（）静态方法调用，它应该像你想要的那样工作。

while(test = true){ 
     rand2 = scan.nextInt(); 
     guess++; 
     if(rand == rand2){ 

      if(guess < 19){ 
       System.out.println("Thats the correct number! And it only took: " + guess + " tries"); 
       break; 
      }else{ 
       System.out.println("It took you: " + guess + " tries to guess the number!"); 
      } 
     }else if(rand < rand2){ 
      System.out.println("Guess lower! "); 
     }else if(rand > rand2){ 
      System.out.println("Guess higher! "); 
     } 
    } 

Answer 3

我有正确的为你，看到如下：

public static void main(String[] args) { 

     Random num = new Random(); 
     Scanner scan = new Scanner(System.in); 
     boolean isOK = false; 
     int counter = 0; 

     int randNum = num.nextInt(100); 
     while(true) { 
      counter++; 

      int n = scan.nextInt(); 
      if(n == randNum) { 
       System.out.println("OK in " + counter + " times"); 
       isOK = true; 
      } else if(n > randNum) { 
       System.out.println("Lower"); 
      } else { 
       System.out.println("Higher"); 
      } 
     } 
    }