Question

    public class javapractice14
{
  public static void main(String[] args)
  {
    int largest = Integer.MIN_VALUE;
    int smallest = Integer.MAX_VALUE;

    Scanner console = new Scanner(System.in);
    System.out.println("Please enter desired amount of numbers (-1 ends program)");
    for( int number = console.nextInt(); number != -1; number = console.nextInt()); //Enter -1 to end program
    {

我收到的错误如下，说无法找到符号：变量号

我相信在for循环中声明了数字，是不是在那里声明了？我已经尝试在循环外声明“ int number; ”，但它以相同的结果结束。我使用：What do I have to do to display the largest and the smallest number using a loop?作为参考，帮助我解决部分问题。

      largest = number > largest ? number : largest;
      smallest = number < smallest ? number : smallest;
    }
    System.out.println("Your largest number is: " + largest);
    System.out.println("You smallest number is: " + smallest);
    }
}

Answer 1

for( int number = console.nextInt(); number != -1; number = console.nextInt());＆lt; - 看到你的for循环结束时有一个分号，它意味着从那里循环结束所以你不能从循环外部引用for循环中声明的块变量。这就是你得到编译错误的原因

删除那个分号。然后它必须正常工作

for( int number = console.nextInt(); number != -1; number = console.nextInt()){ // no semicol at the end
      // your logic
}
// print your numbers

for loop：找不到符号错误

1 个答案: