Question

Write a program that randomly (using the random number generator) picks gift card winners from a list of customers (every customer has a numeric ID) who completed a survey. After the winning numbers are picked, customers can check if they are one of the gift card winners. In your main function, declare an integer array of size 10 to hold the winning customer IDs (10 winners are picked). Pass the array or other variables as needed to the functions you write. For each step below, decide what arguments need to be passed to the function. Then add a function prototype before the main function, a function call in the main function and the function definition after the main function.

Answer 1

Answer:

Explanation:

Since no customer ID information was provided, after a quick online search I found a similar problem which indicates that the ID's are three digit numbers between 100 and 999. Therefore, the Java code I created randomly selects 10 three digit numbers IDs and places them in an array of winners which is later printed to the screen. I have created an interface, main method call, and method definition as requested. The picture attached below shows the output.

import java.util.Random;

interface generateWinner {

   public int[] winners();

}

class Brainly implements generateWinner{

   public static void main(String[] args) {

       Brainly brainly = new Brainly();

       int[] winners = brainly.winners();

       System.out.print("Winners: ");

       for (int x:winners) {

           System.out.print(x + ", ");

       }

   }

   public int[] winners() {

       Random ran = new Random();

       int[] arr = new int[10];

       for (int x = 0; x < arr.length; x++) {

           arr[x] = ran.nextInt(899) + 100;

       }

       return arr;

   }

}