Classes – Library

#include <iostream.h>
#include <conio.h>
#include <stdio.h>

int i, flag, n, f;

class library
{
int bookno, copies, issued;
char bookname[20], author[20];
float price;
public:
void accept()
{
cout<<endl<<“Enter data for book “<<i + 1<<endl
<<“Enter book number : “;
cin>>bookno;
cout<<“Enter book name : “;
gets(bookname);
cout<<“Enter author name : “;
gets(author);
cout<<“Enter book price : “;
cin>>price;
cout<<“Enter number of copies in library : “;
cin>>copies;
cout<<“Enter number of copies issued : “;
cin>>issued;
}
int issue(int num)
{
if (num == bookno)
if (copies > issued)
{
issued++;
flag = 1;
}
return flag;
}
int ret(int num)
{
if (num == bookno)
issued–;
return flag;
}
void display(int num)
{
if (num == bookno)
cout<<endl<<“Displaying data for requested book “
<<endl<<“Book number : “<<bookno<<endl
<<“Book name : “<<bookname<<endl
<<“Author : “<<author<<endl
<<“Price : “<<price<<endl
<<“Number of copies in library : “<<copies
<<endl<<“Number of copies issued : “<<issued;
}
} lib[10];

void main()
{
clrscr();
int ch;
char choice;
cout<<endl<<“Library Management Software”<<endl
<<“Enter data for 10 books in the library”<<endl;
for (i = 0; i < 10; i++)
lib[i].accept();
do
{
cout<<endl<<“Program Menu”<<endl
<<“1. Issue a book”<<endl
<<“2. Return a book”<<endl
<<“3. Display book information”<<endl
<<“Enter your choice : “;
cin>>ch;
if (ch == 1)
{
cout<<endl<<“Enter book number for book to be issued : “;
cin>>n;
flag = 0;
for (i = 0; i < 10; i++)
{
f = lib[i].issue(n);
if (flag == 1)
break;
}
if (flag == 1)
cout<<“Book with book number “<<n<<” has been issued”;
else cout<<“Book with book number “<<n
<<” is not available at the moment”;
}
else if (ch == 2)
{
cout<<endl<<“Enter book number for book to be returned : “;
cin>>n;
for (i = 0; i < 10; i++)
{
f = lib[i].ret(n);
if (flag == 1)
break;
}
if (flag == 1)
cout<<“Book with book number “<<n<<” has been returned”;
}
else if (ch == 3)
{
cout<<endl<<“Enter book number for required book : “;
cin>>n;
for (int i = 0; i < 10; i++)
lib[i].display(n);
}
else cout<<endl<<“You entered an incorrect choice”;
cout<<“\n \nDo you wish to continue – y / n : “;
cin>>choice;
} while (choice == ‘y’ || choice == ‘Y’);
cout<<endl;
getch();
}