CODEWITHSUNDEEP
java
user2291293
user2291293

Reputation: 33

Storing data in Arrays (Java)

I'm just a beginner in Java. Can someone please tell me how to arrange this program. In this program I want to store 10 marks in an array, and then output the ones that are equal to or greater than the average. Help would be appreciated.

public class ClassAverage{
public static void main (String Args []){

    int sum = 0;
    int mark[] = new int [10];

    for(int c = 0; c < 10; c++){

        System.out.print("Enter a mark: ");
        mark[c] = Keyboard.readInt();

        }
    sum = sum + mark[c];
    int average = sum / 10;

    if(mark[c]>=average){
    System.out.print(mark[c]);

    }

}

}

Upvotes: 0

Views: 144

Answers (5)

stinepike
stinepike

Reputation: 54742

Just some modification in your code.

public class ClassAverage{
public static void main (String Args []){

    int sum = 0;
    int mark[] = new int [10];

    for(int c = 0; c < 10; c++){

        System.out.print("Enter a mark: ");
        mark[c] = Keyboard.readInt();

        sum = sum + mark[c];
    }
    int average = sum / 10;

    for(int c = 0; c < 10; c++){

        if(mark[c]>=average)
            System.out.print(mark[c]);

    }    
}

Explanation

  1. You need to add each element to sum to get the total. So add each element within the for loop after taking input
  2. you also need to check each element to compare with the average. So you need to iterate the array again to compare each element.

Upvotes: 1

Aniket Thakur
Aniket Thakur

Reputation: 69035

sum = sum + mark[c];

statement must be inside your loop.

public class ClassAverage{
public static void main (String Args []){

    int sum = 0;
    int mark[] = new int [10];

    for(int c = 0; c < 10; c++)
    {
        System.out.print("Enter a mark: ");
        mark[c] = Keyboard.readInt();
         sum = sum + mark[c];
     }
    int average = sum / 10;
    for(int c = 0; c < 10; c++)
    {
           if(mark[c]>=average)
           {
             System.out.print(mark[c]);

           }
     }
}

Upvotes: 1

Adhav Ravi
Adhav Ravi

Reputation: 21

public class aver{
  public static void main (String Args []){

    int sum = 0;
    int mark[] = new int [10];
    int average;
    for(int c = 0; c < 10; c++){
        System.out.print("Enter a mark: ");
        mark[c] = Keyboard.readInt();
    }
    for(int c = 0; c < 10; c++){
        sum = sum + mark[c];
    }
    average = sum / 10;
    for(int c = 0; c < 10; c++){
        if(mark[c]>=average){
           System.out.println(mark[c]);
        }
    }

  }
}

Upvotes: 1

Juned Ahsan
Juned Ahsan

Reputation: 68715

You need to add another for loop to iterate your array after calculating the average. Here is the updated code with the required for loop:

public static void main (String Args []){
    int sum = 0;
    int mark[] = new int [10];

    for(int c = 0; c < 10; c++) {    
        System.out.print("Enter a mark: ");
        mark[c] = Keyboard.readInt();
        sum = sum + mark[c];
    }

    int average = sum / 10;
    for(int c = 0; c < 10; c++) {
        if(mark[c]>=average){
            System.out.print(mark[c]);
        }
    }
}

Upvotes: 1

Summer_More_More_Tea
Summer_More_More_Tea

Reputation: 13446

You need loop the array twice. The first iteration sums all the elements and computes the average. And the other iteration outputs the elements that meet your constraints.

The code is below:

public class ClassAverage{
    public static void main (String Args []){

        int sum = 0;
        int mark[] = new int [10];
        // The first iteration sums all elements
        for(int c = 0; c < 10; c++){
            System.out.print("Enter a mark: ");
            mark[c] = Keyboard.readInt();

            sum = sum + mark[c];
        }
        int average = sum / 10;
        // This iteration outputs elements that meet your requirements.
        for(int c = 0; c < 10; c++){
            if(mark[c]>=average){
                System.out.print(mark[c]);
            }
        }
    }
}

Upvotes: 3

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