Question

所以昨天我求助了，很多人帮我解决了我的问题，我非常感谢那些人。然而，我遇到了我的第二个问题，我从今天早上开始尝试解决这个问题，现在它早上几乎凌晨2点就已经解决了，直到我解决之前我都不会睡觉这个问题。我不会撒谎，所以这是我测试我的基本知识的功课。我知道我在某个地方犯了重大错误，所以请帮我指出，所以我可以解决它们。谢谢

输出应为：

  1, 2, 3, ave=2
  4, 5, 6, ave=5
aver=2.5, 3.5, 4.5

这是我目前的代码：

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

        System.out.print("Enter a number for rows: ");
        int rows = input.nextInt();

        System.out.print("Enter a number for columns: ");
        int columns = input.nextInt();

        int[][] array = new int[rows][columns];

        System.out.println("Enter the numbers in array: ");

        for(int i=0 ; i<rows ; i++)
        {
            for(int j=0 ; j<columns ; j++)
            {
                array[i][j] = input.nextInt();
            }
        }
        for(int i=0 ; i<rows ; i++)
        {
            for(int j=0  ; j<columns ; j++)
            {
                System.out.print(array[i][j] + " , ");
            }
            System.out.println("\n");    
        }  
    }
    double averageRow(int[][] array) {
        int rowTotal = 0;
        double average = 0;

        for (int rows = 0; rows < array.length; rows++) {
            for (int columns = 0; columns < array[rows].length; columns++) {
                rowTotal += array[rows][columns];
            }
            average = rowTotal / array[rows].length;
            System.out.println(average);
            rowTotal = 0;
        }
        return rowTotal;    
    }
    double averageColumn(int[][] array) {
        int columnTotal = 0;
        double average = 0;

        for (int columns = 0; columns < array.length; columns++) {
            for (int rows = 0; rows < array[columns].length; rows++) {
                columnTotal += array[rows][columns];
            }
            average = columnTotal / array[columns].length;
            System.out.println(average);
            columnTotal = 0;
        }
        return columnTotal;  
    }
}

Answer 1

public static void main(String[] args)
{
    Scanner sc = new Scanner(System.in);
    System.out.println("Enter number of rows");
    int r = sc.nextInt();
    System.out.println("Enter number of columns");
    int c = sc.nextInt();
    System.out.println("Enter values");
    int[][] matrix = new int[r][c];

    for (int i = 0; i < r; i++)
    {
        float rowSum = 0f;
        for (int j = 0; j < c; j++)
        {
            matrix[i][j] = sc.nextInt();
            rowSum += matrix[i][j];
        }
        System.out.println("Average of row " + i + " " + rowSum / c);
    }
    for (int i = 0; i < c; i++)
    {
        float columnSum = 0f;
        for (int j = 0; j < r; j++)
        {
            columnSum += matrix[j][i];
        }
        System.out.println("Average of column " + i + " " + columnSum / r);
    }
    sc.close();
}

您可以在读取数据时找到每行总和。对于列平均运行循环。希望你能睡觉：）

Answer 2

您无需调用其他功能即可进行打印。的的

的
import java.util.Scanner; public class test8 { public static void main(String[] args) { Scanner input = new Scanner(System.in); System.out.print("Enter a number for rows: "); int rows = input.nextInt(); System.out.print("Enter a number for columns: "); int columns = input.nextInt(); int[][] array = new int[rows][columns]; System.out.println("Enter the numbers in array: "); for(int i=0 ; i<rows ; i++) { for(int j=0 ; j<columns ; j++) { array[i][j] = input.nextInt(); } } int rowSum = 0; int colSumArr[] = new int[columns]; for(int i=0 ; i<rows ; i++) { for(int j=0 ; j<columns ; j++) { rowSum = rowSum + array[i][j]; colSumArr[j] = colSumArr[j] + array[i][j]; System.out.print(array[i][j] + " , "); } System.out.println( " ave=" + (double)rowSum/columns); rowSum = 0; } System.out.printf("aver="); for(int i=0;i<columns;i++){ if(i!=columns -1) System.out.print((double)colSumArr[i]/rows + ", "); else System.out.print((double)colSumArr[i]/rows); } } }

的

如何计算数组

2 个答案: