Question

java by using Scite

Objectives:

1. Create one-dimensional arrays and two-dimensional arrays to solve problems

2. Pass arrays to method and return an array from a method

Problem 1:

Find the average of an array of numbers (filename: FindAverage.java)

Write two overloaded methods with the following headers to find the average of an array of integer values and an array of double values:

public static double average(int[] num)

public static double average(double[] num)

In the main method, first create an array of integer values with the array size of 5 and invoke the first method to get and display the average of the first array, and then create an array of double values with the array size of 6 and invoke the second method to get and display the average of the second array.

You can generate the array values using the Math.random() method with the range from 0 to 9. Keep two decimals for the average values.

Answer 1

Hello and Hope you're having a good day. The following code was created using Java and should definitely serve your purpose.

Program:

import java.util.*;

public class FindAverage{
  
    //static method finds int average
    public static double average(int[] num){
        double y = 0;
        for(int i=0;i<num.length;i++){
            y+=num[i];
        }
        y /= num.length;
        return y;
    }
  
    //static method finds double average
    public static double average(double[] num){
        double y = 0;
        for(int i=0;i<num.length;i++){
            y+=num[i];
        }
        y /= num.length;
        return y;
    }

    public static void main(String []args){
      
        //int block
        //creation
        int[] num = new int[5];
        for(int i=0;i<5;i++){
            num[i] = (int) ((Math.random() * (10 - 0)));
        }
     
        //display array
        System.out.println("Int Array:");
        for(int i=0;i<5;i++){
            System.out.println(num[i]);
        }
      
        //find and print average
        double s = average(num);
        System.out.println("Average of Int Array is "+s);
      
        //double block
        //creation
        double[] num2 = new double[6];
        for(int i=0;i<6;i++){
            num2[i] = Math.random() * (10 - 0);
        }
     
       //display array
        System.out.println("Double Array:");
        for(int i=0;i<6;i++){
            System.out.println(num2[i]);
        }
      
        //find and print average
        double s2 = average(num2);
        System.out.println("Average of Double Array is "+s2);
      
      
    }
}

NB: There are better methods to generate Random numbers in Java like the Random Package in Utils. Math.Random returns a double which has to be bound and typecasted to an int to suit our needs. Please look into those for more information.

I hope this has helped you. Thank you and have a nice day. Happy learning!