C++ program with student as abstract class & create derived classes engineering medicine and science from base class student.

Wap with student as abstract class & create derived classes engineering medicine and science from base class student. Create objects of the derived classes and process them and access them using array of pointers of type base class student.

Source Code:

#include<iostream.h>

#include<conio.h>

class student

{

public:

virtual void getdata()=0;

virtual void display()=0;

};

class engineering:public student

{

int r;

char n[10];

public:

void getdata()

{

cout<<"faculty->Engineering"<<endl;

cout<<"enter name";

cin>>n;

cout<<"enter roll";

cin>>r;

}

void display()

{

cout<<endl<<"name="<<n;

cout<<endl<<"roll="<<r<<endl<<endl;

}

};

class medicine:public student

{

int r;

char n[10];

public:

void getdata()

{ cout<<"Faculty->Medicine";

cout<<endl<<"enter name";

cin>>n;

cout<<"enter roll";

cin>>r;

}

void display()

{

cout<<endl<<"name="<<n;

cout<<endl<<"roll="<<r<<endl<<endl;

}

};

class science:public student

{

int r;

char n[10];

public:

void getdata()

{ cout<<"Faculty->Science";

cout<<endl<<"enter name";

cin>>n;

cout<<"enter roll";

cin>>r;

}

void display()

{

cout<<endl<<"name="<<n;

cout<<endl<<"roll="<<r<<endl<<endl;

}

};

void main()

{

clrscr();

student *ptr[3];

engineering e;

medicine m;

science s;

ptr[0]=&e;

ptr[0]->getdata();

ptr[0]->display();

ptr[1]=&m;

ptr[1]->getdata();

ptr[1]->display();

ptr[2]=&s;

ptr[2]->getdata();

ptr[2]->display();

getch();

}