Question

If possible, write this code in object oriented programming, if not in object oriented that's okay I can convert it. All in C++ language

Generate a list of random numbers using srand and rand, sort the random numbers and put the sorted list into a text file (.txt) using for loop and use stream insertion operator to a text file. Also, put it in a binary file (not using a for loop or stream insertion [use right system caller]). All arrays must be dynamic (in pointer notation, nothing in brackets) and not static. Show null pointers. Treat every number as a radius, so write a class header file to calculate the circumference of the circle and area.

Answer 1

import java.io.FileOutputStream;

import java.io.FileWriter;

import java.io.IOException;

import java.io.ObjectOutputStream;

import java.io.PrintWriter;

import java.util.Arrays;

import java.util.Random;

public class Tester {

public static void main(String[] args) {

  

Random rand = new Random();

int randomArray[] = new int[10];

//Generating the random array with limit from 0-100

for(int i=0; i<randomArray.length;i++){

randomArray[i] = rand.nextInt(100);

}   

//Sorting the array

Arrays.sort(randomArray);

  

//Writing to text file

try {

//Using fileWriter and printWriter to write the random number to text file

FileWriter fileWriter = new FileWriter("C:\\Srini\\Random.txt");

PrintWriter printWriter = new PrintWriter(fileWriter);

//using for each loop to write the array to text file

for(int i:randomArray){

printWriter.println(i);

}

printWriter.close();

fileWriter.close();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

  

  

//Writing the random numbers to binary file

try {

//Using ObjectOutputStream to write the array to binary file.

ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream("C:\\Srini\\Random.dat"));

oos.writeObject(randomArray);

oos.close();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

  

//Printing the circumference and area of the random radii

for(int i:randomArray){

System.out.println("Radius: "+ i +"\tCircumference: "+getCircumference(i)+"\tArea: "+getArea(i));

}

}

private static double getCircumference(int radius) {

// TODO Auto-generated method stub

double circumference = (double)(2 * Math.PI * radius);

return circumference;

}

private static double getArea(int radius) {

// TODO Auto-generated method stub

double area =(double)(Math.PI * radius * radius);

return area;

}

}

Output: