Java Assignment: Solve Array Problems with This Program

Instructions

Objective

Write a java assignment program to solve array problems.

Requirements and Specifications

Source Code

import java.io.File; import java.util.Scanner; public class Lab5 { public static int[] readArray(Scanner sc) { /* * Given a file_name, this function will read the content * from that file and generate an array of integers based on the values * in the file */ // Read first line containing the size of the array int size = sc.nextInt(); // Create Array int array[] = new int[size]; // Now, read the next n lines for(int i = 0; i < size; i++) { array[i] = sc.nextInt(); } // return array return array; } static int getTotal(int[] array) { /* * Given an array of integers, this function returns the sum of all the elements in the array */ // get size int size = array.length; int total = 0; // store total in this variable // Loop through array for(int i = 0; i < size; i++) { total += array[i]; } return total; } static double getAverage(int[] array) { /* * Given an array of inegers, this function returns the average between all values in the array */ // get size int size = array.length; // get total sum of all elements in array int total = getTotal(array); // calculate average double average = (double)total/size; return average; } static int getLowest(int array[]) { /* * Given an array of integers, this function returns the smallest integer on it */ // get size int size = array.length; // assume that the lowest is the first element int lowest = array[0]; // Loop through array starting at index 1 for(int i = 1; i < size; i++) { if(array[i] < lowest) { // current element at index i is lower than 'lowest' lowest = array[i]; } } return lowest; } static int getHighest(int array[]) { /* * Given an array of integers, this function returns the highest integer on it */ // get size int size = array.length; // assume that the highest is the first element int highest = array[0]; // Loop through array starting at index 1 for(int i = 1; i < size; i++) { if(array[i] > highest) { // current element at index i is jhigher than 'highest' highest = array[i]; } } return highest; } public static void main(String[] args) throws Exception { // read array Scanner sc = new Scanner(new File("lab5data.txt")); int array[] = readArray(sc); System.out.println("The numbers read from file are: "); for(int i = 0; i < array.length; i++) { System.out.print(array[i] + " "); } System.out.println(""); System.out.println("Total: " + getTotal(array)); System.out.println("Average: " + getAverage(array)); System.out.println("Lowest: " + getLowest(array)); System.out.println("Highest: " + getHighest(array)); } }