Answer to Question #212504 in Electrical Engineering for ali

Question

Question No. 2: Answer the following questions? ( 15 Marks ) [ CLO2 ] 

Make a class named Person 

o It has two attributes name, for person name, as a character array of size 50 and age, for a 

person’s age as a positive integer.

o Make a function named get() to get a person’s name and age from user.

o Make a function named show() to show a person’s name and age on screen.

o Make a child class named Student and privately inherit this class from Person class.

o It has one attribute gpa, as a float data type.

o Make a function named get() to get name, age and gpa of a student from user.

o Make a function named show() to show the name, age and gpa of a student on screen.

o In the main() function make a Student object and call get() and show() functions through this 

object and close the program.

Answer 1

//importing util to take input from user

import java.util.*;

public class Main

{

  public static void main(String[] args) {

     

     //creating object for Student class

     Student s1 = new Student();

     

     //calling methods in Student class

     s1.Get_Data();

     s1.Show_Data();

     

  }

}

//Person class

class Person

{

//declaring the given variables as private

private char[] name = new char[50];

private int age;

  

//no argument constructor

Person()

{

//initializing to empty string

name = "".toCharArray();

  

//initializing to 0

age = 0;

}

  

//argument constructor

Person(String name, int age)

{

this.name = name.toCharArray();

this.age = age;

}

  

//Get_Data method to take input from user

void Get_Data()

{

Scanner ob = new Scanner(System.in);

  

System.out.print("Enter name: ");

String s = ob.nextLine();

name = s.toCharArray();

  

System.out.print("Enter age: ");

age = ob.nextInt();

  

}

  

//to print data

void Show_Data()

{

System.out.println("Name: "+new String(name)+"\nAge: "+age);

}

  

}

//Student class extends person class

class Student extends Person

{

//declaring variables

private char[] degree = new char[50];

private double gpa;

  

//no argument constructor

Student()

{

//calling parent class no argument constructor

super();

degree = "".toCharArray();

gpa = 0;

}

  

//argument constructor

Student(String name, int age, String degree, double gpa)

{

//calling parent class argument constructor to initialize name and age

super(name,age);

this.degree = degree.toCharArray();

this.gpa = gpa;

}

  

//Override method Get_Data

void Get_Data()

{

//calling parent class Get_Data method

super.Get_Data();

  

Scanner ob = new Scanner(System.in);

  

System.out.print("Enter degree: ");

String s = ob.nextLine();

degree = s.toCharArray();

  

System.out.print("Enter gpa: ");

gpa = ob.nextDouble();

}

  

//Override method Show_Data

void Show_Data()

{

//calling parent class Show_Data method

super.Show_Data();

  

System.out.println("Degree: "+new String(degree)+"\nGPA: "+gpa);

}

}