Question

1.在此代码之前对数组进行了声明，但这不起作用

    /*
 * ------------------------Sorting students-------------------------
 */

import java.util.*;

public class Exercise6_19 {

    public static void main(String[] args) {
    Scanner input = new Scanner(System.in);
    System.out.print("Enter the number of students: ");
    int students = input.nextInt();
    String[] names = new String[students];
    int[] scores = new int[students];

    for(int i = 0; i < names.length; i++){
        System.out.print("Enter student's name: ");
        names[i] = input.nextLine();
        System.out.print("Enter student's score: ");
        scores[i] = input.nextInt();
    }
    Arrays.sort(scores);
    for(int i = 0; i < scores.length; i++){
        System.out.println (names[i]+" has "+scores[i]);
    }

    System.out.println("");
    reverse(scores, names);

    for(int i = 0; i < scores.length; i++){
        System.out.println (names[i]+" has "+scores[i]);
    }


    }

    public static void reverse(int[] numbers, String[] names) {
        for(int i = 0; i < numbers.length; i++){
            numbers[numbers.length  - 1 - i] = numbers[i];
            names[names.length - 1 - i] = names[i];
        }

    }


}

Answer 1

这是固定版本

public static void main(String[] args) {

    Scanner scanner = new Scanner(System.in);
    System.out.print("Enter the number of students: ");
    int students = scanner.nextInt();
    String[] names = new String[students];
    int[] scores = new int[students];

    for (int i = 0; i < names.length; i++) {

        System.out.print("Enter student's name: ");
        names[i] = scanner.next();
        System.out.print("Enter student's score: ");
        scores[i] = scanner.nextInt();
    }
    Arrays.sort(scores);
    for (int i = 0; i < scores.length; i++) {
        System.out.println(names[i] + " has " + scores[i]);
    }
    scanner.close();
}

输出

Enter the number of students: 2
Enter student's name: a1
Enter student's score: 11
Enter student's name: a2
Enter student's score: 22
a1 has 11
a2 has 22

<强> UPD

如果您对names进行排序，我猜你也应该调整scores。

如何将数据类型String的控制台输入写入数组？

1 个答案: