Simple Array

/* This program uses array, function calling, passing parameters It asks the user to enter however many integers they want Then it will output the integers to the screen, at the same time It will write to a file called data.txt * */ import java.util.*; // needed for scanner class import java.io.*; //needed to write and read file class array { //This function asks the user how many integers they want to entere public static int prompUser() { Scanner key = new Scanner(System.in); System.out.println("How many integers would you like to enter: "); int x = key.nextInt();//reads in the integers and store in x return x;//returns the x number of integers } //This function stores the integers into the array public static int[] loadArray(int[] array) { Scanner key = new Scanner(System.in); //The for loops asks the user for a series of integers for (int i = 0; i < array.length; i++) { System.out.println("Enter an integer: "); array[i] = key.nextInt(); } return array;//returns the array that holds the integers } //This function, we writes the integers into a file and prints it to the screen public static void outPut(int y, int[] arr) throws IOException { PrintWriter pw = new PrintWriter("data.txt");//opening the file data.txt int x = 0; while ( x < y) { pw.println(arr[x]);//writes the integer into the file System.out.println("The integer you enter are: " + arr[x] + "\n");//outputs the integer on the screen x++; } pw.close();//close the file when it's done } public static void main(String[] args) throws IOException { int[] k;//declare k as an array int y = prompUser(); //y equals to the number of integer user will be inter int[] num = new int[y];//sets the size of the array to y k = loadArray(num);//passing the array into the function loadArray & sets k equal to that array outPut(y, k);//passing the size and the array k into the function outPut } }

 

Here is the output of the program

How many integers would you like to enter:
4
Enter an integer:
32
Enter an integer:
22
Enter an integer:
12
Enter an integer:
44
The integer you enter are: 32

The integer you enter are: 22

The integer you enter are: 12

The integer you enter are: 44


----jGRASP wedge2: exit code for process is 0.
----jGRASP: operation complete.

 

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