Question

请帮助我的教授教学不好我的教授希望我用户将输入其索引和元素的值我尝试做2循环，但它不会工作

import java.util.Scanner;
public class Arrays 
{
    public static void main (String [] args)
    {   
        Scanner sc = new Scanner (System.in);

        int index;
        int elements;

        System.out.println("Input Array Size");
        index = sc.nextInt();


        for (int i = 0; i < index; i++) 
        {
            System.out.println("Array Index is =\t"+index);
            System.out.println ("Insert the Elements of the Array");
            break;
        }
    }
}

如果有人知道这方面的链接，请发送给我我非常需要你的帮助我需要学习输入搜索和删除数组，但使用扫描仪干草请帮助我 - 学生

Answer 1

您还需要在for循环中扫描输入。请查看以下代码

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        try {
            System.out.print("Input Array Size : ");
            int size = sc.nextInt();

            int[] elements = new int[size];
            System.out.println("Insert "+size+" Elements of the Array");
            for (int i = 0; i < size; i++) {
                System.out.print("Element "+i+" : ");
                elements[i] = sc.nextInt();
            }

            System.out.println("Provided array:" + Arrays.toString(elements));          
        } finally {
            sc.close();
        }
   }

Answer 2

这里的问题是你只是打印数组大小，而不是接受任何输入来填充数组。实际的方法如下。

import java.util.Scanner;

public class Arrays
{
    public static void main(String[] args)
    {
        //Create a Scanner to read input
        Scanner scan = new Scanner(System.in);

        //Promt the user to enter the array size and store the input
        System.out.println("Enter the size of the array:");
        int arraySize = scan.nextInt();

        //Create an array (For this example we'll use an integer array)
        int[] array = new int[arraySize];

        //Create a for loop to run through array
        for(int i = 0; i < arraySize; i++)
        {
            //Prompt the user to enter a number at the current index (i)
            System.out.println("Enter the element at index " + i + ":");

            //Store the input at index i in the array
            array[i] = scan.nextInt();
        }
    }
}

带扫描仪的阵列

2 个答案: