Question

Imagine a publishing company that markets both books and audio-cassette versions of its works. Create a class publication that stores the title (a string) ad price (type float) of a publication. From this class derive two classes: book, which adds a page count (type int); and tape, which adds a playing time in minutes (type float). Each of these three classes should have a getdata() function to get its data from the user at the keyboard, and a putdata() function to display its data.

Write a main() program to test the book and tape classes by creating instances of them, asking the user to fill in their data with getdata(), and then displaying the data with putdata().

Answer 1

#include <iostream.h>

#include<conio.h>

#include<stdio.h>

class publication

{

char title[20];

float price;

public: void getdata()

{

cout<<"Enter title: "; gets(title);

cout<<"Enter price: "; cin>>price;

}

void putdata()

{

cout<<"Title: "<>page_count;

}

void putdata()

{ publication::putdata();

cout<<"Page count: "<<page_count<<endl;

}

};

class tape:public publication

{

float play_time;

 public:

void getdata()

{ publication::getdata();

cout<<"Enter Play time: ";

cin>>play_time;

}

void putdata()

{ publication::putdata();

cout<<"Play time: "<<play_time<<endl;

}

};

void main()

{  clrscr();

book b;

tape t;

b.getdata();

b.putdata(); 

t.getdata();

t.putdata();

getch();\

}

Comments

class Publication
{
String Title;
float Price;
Scanner sc= new Scanner(System.in);

public void  getdata( )
{

System.out.println("Enter the Title:") ;
Title = sc.nextLine();
System.out.println("Enter the Price:") ;
Price = sc.nextFloat();
}
public void putdata()
{
System.out.println("Title:"+Title);
System.out.println("Price:"+Price);
}
}
class Book extends Publication
{
int page_count;

public void disp()
{
System.out.println("Enter Book Details");
}
public void getdata()
{
super.getdata();//call publication class function to get data
System.out.println("Enter Book Page Count") ;
page_count = sc.nextInt();
}
void show()
{
System.out.println("Details of Book is:");
}
public void putdata()//call publication class function to put data
{
super.putdata();
System.out.println("Page_count:"+page_count);
}
}
class Tape extends Publication
{
float playing_time;
public void disp()
{
System.out.println("Enter Tape Details:");
}
public void getdata()
{

super.getdata();//call publication class function to get data
System.out.println("Enter Playing time OF Tape:") ;
playing_time = sc.nextFloat();
}
void show()
{
System.out.println("Details of Tape is:");
}
public void putdata()//call publication class function to put data
{
super.putdata();
System.out.println("Playing_Time:"+playing_time);
}
}
public class Publication2 {
public static void main(String[] args) {
Book obj1=new Book();
Tape obj2=new Tape();
obj1.disp();
obj1.getdata();
obj2.disp();
obj2.getdata();
obj1.show();
obj1.putdata();
obj2.show();
obj2.putdata();
}}