Program for book shop using pointers to base class

Program for book shop using pointers to base class This is a simple program that is used to provide information abt the book details n ect Code : #include<iostream.h> #include<conio.h> class book { char name[30]; long int tel; public: void read() { cout<<" name:" ; cin>>name; cout<<name; cout<<" tel:"; cin>>tel; } void disp() { cout<<" PURCHASER DETAILS : "; cout<<" Name : "<<name; cout<<" Tel No.:"<<tel; } }; class shop:public book { char isbn[20],bname[30]; long int price; public: void read() { cout<<" Book-Name : "; cin>>bname; cout<<" ISBN NO. : "; cin>>isbn; cout<<" Price of Book : Rs."; cin>>price; } void disp() { cout<<" BOOK DETAILS :"; cout<<" Book-Name :" <<bname; cout<<" ISBN No. :"<<isbn; cout<<" Price : Rs."<<price; } }; void main() { clrscr(); book *ptr; book p; ptr=&p; cout<<" Enter details of purchaser : "; (*ptr).read(); shop c; ptr=&c; cout<<" Enter the details of the book sold : "; ((shop *)ptr)->read(); (*ptr).disp(); ((shop *)ptr)->disp(); getch(); }