Constructors

Program to demonstrate the functioning of default, parameterized and copy constructor :-

#include<iostream.h>

#include<conio.h>

#include<stdio.h>

class book

{

int book_id;

float price;

char title[50];

public:

book()

{  }

book(int i, float p, char t[50])

{

book_id=i;

price=p;

strcpy(title,t);

}

book(book &b)

{

book_id=b.book_id;

price=b.price;

strcpy(title,b.title);

}

void get()

{

cout<<"\n enter book id:  ";

cin>>book_id;

cout<<"\n enter title of the book:  ";

            gets(title);

cout<<"\n price of the book:  ";

cin>>price;

}

void show()

{

cout<<"\n tilte of book:  "<<title;

cout<<"\n id of book:     "<<book_id;

cout<<"\n price of book:  "<<price<<endl<<endl;

}

  };

void main()

{

book b1,b2(1,50.5,"physics");

b1.get();

book b3(b2);

      clrscr();

cout<<"\n details of b1 \n";

b1.show();

cout<<"\n details of b2 \n";

b2.show();

cout<<"\n details of b3 \n" ;

b3.show();

getch();

}