2 dimensional arrays and using Scanner in java

Question

I have an assignment which must be like this way I want the user to enter how many modules he has in the college (so this will be in the first array), then I want to know from the user what are the marks he got in the assignment.

I wrote it but I have a problem with the code If anyone can help me, I will be grateful.

public class Main {
  public static void main(String[] args) {
    Scanner Sc = new Scanner(System.in);
    int mo, i, j, a;
    System.out.println(" Enter NO.modules you have");
    mo = Sc.nextInt();
    // create the Array
    int[] tab = new int[mo];
    for (a = 0; a < mo; a++) {
      System.out.println(" Enter the module name : " + (a + 1));
      tab[a] = Sc.nextInt();
    }
    int[][] list = new int[2][mo];
    for (i = 0; i < 2; i++) {
      for (j = 0; j < mo; j++) {
        System.out.println(" Enter the marks of the Assignment : "+(i+1)+","+j);
        list[i][j] = Sc.nextInt();
      }
    }
  }
}

Hi there Beth. It would be easier for people to answer if you can share the error that you are facing and what have you done to fix it as well. — Nisanth Reddy
– Nisanth Reddy, Commented May 10, 2021 at 17:49

The_Long_Distance_Runner · Accepted Answer · 2021-05-10 17:26:16Z

1

I think you are creating an array of wrong bounds- instead of int [][] list=new int [2][mo] there should be int [][] list=new int [mo][2]; ,because for every module you have marks of first and second assignment, am I right?

answered May 10, 2021 at 17:26

The_Long_Distance_Runner

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Community · Accepted Answer · 2021-06-08 17:49:17Z

0

You can try this way

import java.util.Scanner;
public class Main {
  public static void main(String[] args) {
    Scanner Sc = new Scanner(System.in);
    int mo, i, j, a;
    System.out.println(" how many modules you have in this semester ?");
    mo = Sc.nextInt();
    // creat the Array
    int[] tab = new int[mo];
    for (a = 0; a < mo; a++) {
      System.out.println(" Enter the module name : " + (a + 1));
      tab[a] = Sc.nextInt();
    }
    int[][] list = new int[2][mo];
    for (i = 0; i < 2; i++) {
      for (j = 0; j < mo; j++) {
        System.out.println(" Enter the marks of the " +
          (i + 1) + " Assignment : " + (i + 1) + "," + j);
        list[i][j] = Sc.nextInt();
      }
    }
  }
}

edited Jun 8, 2021 at 17:49

CommunityBot

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answered May 10, 2021 at 17:42

Shruti Singhal

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