Question

Programmer defined Function / Arrays: 1.Write a function for printing an array. void print_array (int arr[], int size); 2. Write a function to generate an array of random integers. void random_array (int arr[], int size, int range); The scale of numbers should be 1 to range. 3. Write a function to find the sum of a sequence of number. int sum (int arr[], int size); 4. Write a function rotate(arr[], d, n) that rotates arr[] of size n by d elements. Example: Rotation of the above array by 2 will make array. In your main function, call the above functions:  Declare an array of size that input by user.  Initialize this array with random values. (task 2)  Display this array. (task 1)  Display the sum of the numbers in the array. (task 3)  Ask user for number of elements to rotate ‘d’.  Call the user defined function named ‘rotate’. (task 4)  Display the array again.

Answer 1

import java.util.Scanner;

import java.util.concurrent.ThreadLocalRandom;

public class Array {

   public static void main(String[] args) {

       Scanner s = new Scanner(System.in);
       System.out.println("Enter the size of the array");
       int size = s.nextInt();
       int arr[] = new int[size];
       System.out.println("Enter the range of randomization for the array");
       int range = s.nextInt();
       random_array(arr, size, range);
       print_array(arr, size);
       int sum = sum(arr, size);
       System.out.println("The sum of the values of the above array is " + sum);
   }

   static void print_array(int arr[], int size){
       for (int i=0; i<size;i++){
           System.out.print(arr[i] + " ");
       }
       System.out.println();
   }

   static void random_array(int arr[], int size, int range){
       int random = 0;
       for (int i=0; i<size; i++){
           random = ThreadLocalRandom.current().nextInt(1, range+1);
           arr[i] = random;
       }
   }

   static int sum (int arr[], int size){
       int sum = 0;
       for (int i=0; i<size;i++){
           sum += arr[i];
       }
       return sum;
      
   }
}

P. S. The description of the fourth function (rotation) is not clear and the example is incomplete. Please give more details in comments and I'll work on it :)