implement C++ program for abstract classes

#include< iostream.h >

#include< conio.h >

class item

{                                                                                          

private:

int a,b,c,d;

public:

void get();

void multiply();

void sum();

};

void item::get()

{

cout<<"enter a & b :" ;

cin>>a>>b;

}

void item::sum()

{

c=a+b;

cout<<"\n sum is"<< c;

}

void item::multiply()

{

d=a*b;

cout<<"\n multiplication is "<< d;

}

void main()

{

clrscr();

item t;

t.get();

t.sum();

t.multiply();

getch();

}

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Out put

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Enter a & b : 5

4

Sum is 9

Multiplication is 20