Answer:
The code for this problem is completed here. Comments are added, go and learn how things work.
Explanation:
// Arrays.java
import java.util.Random;
import java.util.Scanner;
public class Arrays {
// method to fill an array with random numbers between low and high
static void fillArray(int array[], int low, int high) {
Random random = new Random();
for (int i = 0; i < array.length; i++) {
// generating a value between low and high inclusive, adding to
// array
array[i] = random.nextInt(high - low + 1) + low;
}
}
// method to print elements in an array
static void printArray(int array[]) {
for (int i = 0; i < array.length; i++) {
// displaying elements separated by tab space
System.out.print(array[i] + "\t");
// printing a line break after every 5th element, or if this is the
// last element.
if ((i + 1) % 5 == 0 || i == array.length - 1) {
System.out.println();
}
}
}
// method to count the number of elements in array greater than value
static int count(int array[], int value) {
// initializing count to 0
int c = 0;
for (int i = 0; i < array.length; i++) {
if (array[i] > value) {
// incrementing c
c++;
}
}
return c;
}
// returns true if two arrays are same, else false
static boolean isSame(int array1[], int array2[]) {
if (array1.length != array2.length) {
// lengths mismatch
return false;
}
// checking if elements are same in same order
for (int i = 0; i < array1.length; i++) {
if (array1[i] != array2[i]) {
// mismatch found
return false;
}
}
// same
return true;
}
// returns the average of elements in an array
static double findAverage(int array[]) {
double sum = 0;
// summing values
for (int i = 0; i < array.length; i++) {
sum += array[i];
}
// finding average
double avg = (double) sum / array.length;
return avg;
}
// method to count the number of values greater than average of an array
static int aboveAverage(int array[]) {
// finding average of passed array using findAverage method
double avg = findAverage(array);
// finding number of elements in array>avg using count method
int c = count(array, (int) avg);
return c;
}
public static void main(String[] args) {
// setting up a Scanner
Scanner scanner = new Scanner(System.in);
// prompting and reading size of arrayA
System.out.print("Enter size of arrayA: ");
int n1 = scanner.nextInt();
// initializing arrayA
int arrayA[] = new int[n1];
// doing the same for arrayB
System.out.print("Enter size of arrayB: ");
int n2 = scanner.nextInt();
int arrayB[] = new int[n2];
// asking and reading low and high values
System.out.print("Enter low and high values for random numbers: ");
int low = scanner.nextInt();
int high = scanner.nextInt();
// filling both arrays
fillArray(arrayA, low, high);
fillArray(arrayB, low, high);
// printing both arrays
System.out.println("arrayA:");
printArray(arrayA);
System.out.println("arrayB:");
printArray(arrayB);
// reading an integer
System.out.print("Enter an integer value: ");
int value = scanner.nextInt();
// displaying the number of elements in each array greater than above
// value
System.out.println("The number of elements greater than " + value
+ " in arrayA: " + count(arrayA, value));
System.out.println("The number of elements greater than " + value
+ " in arrayB: " + count(arrayB, value));
System.out.println("Both arrays are same: " + isSame(arrayA, arrayB));
// finding and displaying average of arrayA
double avgA = findAverage(arrayA);
System.out.println("Average of all values in arrayA: " + avgA);
// finding and displaying number of elements in arrayB greater than the
// average of arrayB
System.out.println("The number of elements greater than "
+ "the average of arrayB" + " in arrayB: "
+ aboveAverage(arrayB));
}
}
