问题

import java.util.Scanner;

public class chapter7e5 {

    public static void main(String[] args) {

        Scanner input = new Scanner(System.in);
        System.out.print("Enter 10 numbers: ");

        int[] numberArray = new int[10];
        int[] distinctArray = new int[10];
        int distinct = 0;

        for (int i = 0; i < 10; i++)
            numberArray[i] = input.nextInt();

        distinctArray[0] = numberArray[0];

        for (int i = 1; i < numberArray.length; i++) {

            boolean exists = false;

            for (int j = 0; j < distinctArray.length; j++) {

                if (numberArray[i] == distinctArray[j]) {
                    exists = true;
                    break;
                }
            }

            if (!exists) {
                distinctArray[distinct] = numberArray[i];
                distinct++;
            }
        }

        System.out.println("The number of distinct numbers is " + distinct);
        System.out.print("The distinct numbers are: ");

        for (int k = 0; k < distinct; k++)
            System.out.print(distinctArray[k] + " ");
    }
}

import java.util.Scanner;

public class chapter7e5 {

    public static void main(String[] args) {

        Scanner input = new Scanner(System.in);
        //create Scanner

        System.out.print("Enter 10 numbers: ");

        int[] numberArray = new int[10];
        //create array for all numbers

        int[] distinctArray = new int[10];
        //create array for distinct numbers

        int distinct = 0;

        for (int i = 0; i < 10; i++)
        //for loop to have user enter numbers and put them into array
            
            numberArray[i] = input.nextInt();

        distinctArray[0] = numberArray[0];
        //first value will be distinct

        for (int i = 1; i < numberArray.length; i++) {
        //loop to go through remaining values in numberArray

            boolean exists = false;
            //create boolean
            
            for (int j = 0; j < distinctArray.length; j++) {
            //loop to check if value exists already in distinctArray

                if (numberArray[i] == distinctArray[j]) {

                    exists = true;
                    //if value does already exists, then exist = true

                    break;
                    //break out of inner loop
                    
                }
            }

            if (exists == false) {
            //if value is unique then add it to the distinct array

                distinctArray[i] = numberArray[i];

                distinct++;
                //increment variable distinct

            }
        }
        //}

        System.out.println("The number of distinct numbers is " + distinct);

        System.out.print("The distinct numbers are: ");

        for (int k = 0; k < distinct; k++)
            
            System.out.print(distinctArray[k] + " ");

    }

}

答案1

得分: 0

我有以下建议：

• 将外部循环中的每个数字从 numbArray 赋值给 testNumber <br>
  例如：int testNumber = numbArray[i];

• 在内部循环中，检查没有其他数字等于 testNumber。注意，当 i == j 时不进行测试，因为该数字是分配给 testNumber 的数字

     if (i != j && numberArray[j] == testNumber) {
            exists = true;
            break;
     }

• 然后在用于确定是否分配数字的 if 语句中，您可以这样做

    if (!exists) {
   如果值是唯一的，则将其添加到 distinct 数组中
  stinctArray[distinct++] = testNumber;
  

请注意，在上面的代码中，通常不会显式地将布尔值与 true 或 false 进行比较。由于 if 语句在 true 或 false 条件下评估，您可以直接使用该值。因此，`exists` 表示存在，而 `!exists` 表示不存在。

<details>
<summary>英文翻译</summary>

I have the following suggestions:

- Assign each number in the outer loop `numbArray` to  `testNumber` &lt;br&gt;
    e.g. `int testNumber = numbArray[i];`

- in the inner loop, check that no other number is equal to `testNumber`.  Note that &lt;br&gt;testing is not done when `i == j` since that number was the one assigned to `testNumber`

 if (i != j && numberArray[j] == testNumber) {
        exists = true;
        break;
 }

- Then in your if clause to determine whether to assign the number or not you can do this

 if (!exists) {
	// if value is unique then add it to the distinct array
	distinctArray[distinct++] = testNumber;
}

Note above that is is common practice to not explicitly test boolean against true or <br> false. Since the if statement evaluates on true or false conditions, you can just use the <br>value. So `exists` means it is there and `!exists` means it isn't

</details>