java - 求 5x5 数组的和

Question

我的代码遇到问题。我试图找到这个 5x5 数组的总和，但它总是给我总计 0。当我使用 2x2 数组时，它可以工作，但对于 5x5 数组则不起作用。有人可以帮忙吗？

import java.util.*;

public class QuestionOne
{
  public static void main(String[] args) 
  {
    Random rand = new Random();
    int num1=0, num2=0, num3=0, num4=0, num5=0;
    int [][] numArray = new int [5][5];
    int average =0, totalRow=0;
    int highestVal=0, lowestVal=0;

    for (int row = 0; row < 5; row++)
    {
      num1 = rand.nextInt(1000) + 1;
      num4 =rand.nextInt(1000) + 1;
      for (int col = 0; col < 4; col++)
      {
        num2 = rand.nextInt(1000) + 1;
        num5 = rand.nextInt(1000) + 1;
      }
      num3 = rand.nextInt(1000) + 1;
      System.out.println(num1+" " +num2+" " +num3 +" " +num4 +" " +num5);
    }

    //Sum all values    
    int total;
    total =0;
    for (int row = 0; row < numArray.length; row++)
    {
      for (int col = 0; col < numArray[row].length; col++)
      {
        total = total + numArray[row][col];
      }
    }

    System.out.println("The total is " + total);
//System.out.println(numArray.length);

Answer 1

这里的问题是值没有设置到数组中，

请找到下面的工作代码。

public static void main(String[] args) {
        Random rand = new Random();
        int num1=0, num2=0, num3=0, num4=0, num5=0;
        int [][] numArray = new int [5][5];
        int average =0, totalRow=0;
        int highestVal=0, lowestVal=0;

        for (int row = 0; row < 5; row++)
        {
          for (int col = 0; col < 5; col++)
          {
            num5 = rand.nextInt(1000) + 1;
            numArray[row][col] = num5;
          }
        }

        //Sum all values    
        int total;
        total =0;
        System.out.println(numArray.length);
        for (int row = 0; row < numArray.length; row++)
        {
          for (int col = 0; col < numArray[row].length; col++)
          {
            total = total + numArray[row][col];
            System.out.println("Row : " + row + "/Col : " + col);
            System.out.println("Total : " + total + "/value : " + numArray[row][col]);
          }
        }

        System.out.println("The total is " + total);

    }