Library Management System in C++ with File Handling.

#include<fstream>
#include<iostream>
#include<iomanip>
#include<string.h>
using namespace std;

class Library
{
int BookId;
  char Title[20];
  char Author[20];
  char Category[20];
  int Pages;
  float Price;
 public:
  //Accessor Functions
int getID(){return BookId;}
  char* getTitle(){return Title;}
  char* getAuthor(){return Author;}
  char* getCategory(){return Category;}
  float getPrice(){return Price;}

  //Default constructor
Library()
  {
  BookId=0;
strcpy(Title,"");
strcpy(Author,"");
strcpy(Category,"");
Pages=0;
  Price=0;
}

void getBook();
void listView();
void showBook();
void header();
}l;

void Library::getBook()
{
cout<<"\tEnter Book Id : ";
cin>>BookId;
cout<<"\tEnter Book Title : ";
cin.get();
cin.getline(Title,20);
cout<<"\tEnter Book Author: ";
cin.getline(Author,20);
cout<<"\tEnter Book Category: ";
cin.getline(Category,20);
cout<<"\tEnter No. of Pages : ";
cin>>Pages;
cout<<"\tEnter Price of Book: ";
cin>>Price;
cout<<endl;
}

//For displaying the book details in individual form
void Library::showBook()
{
cout<<endl;
cout<<"Book ID      : "<<BookId<<endl;
cout<<"Book Title   : "<<Title<<endl;
cout<<"Author Name  : "<<Author<<endl;
cout<<"Category     : "<<Category<<endl;
cout<<"No. of Pages : "<<Pages<<endl;
cout<<"Price of Book: "<<Price<<endl;
}

//For displaying header for Display all function
void Library::header()
{
cout.setf(ios::left);
cout<<setw(5)<<"I.D."
<<setw(20)<<"Book Title"
<<setw(20)<<"Book Author"
<<setw(15)<<"Category"
<<setw(6)<<"Pages"
<<setw(6)<<"Price"<<endl;
for(int i=1;i<=72;i++)
cout<<"=";
cout<<endl;
}

//For displaying in the tabular form used in Display all function
void Library::listView()
{
cout.setf(ios::left);
cout<<setw(5)<<BookId
<<setw(20)<<Title
<<setw(20)<<Author
<<setw(15)<<Category
<<setw(6)<<Pages
<<setw(6)<<Price<<endl;
}

//Function prototyping for project
void drawLine(char);//Fx for drawing line on screen.
void heading(); //Fx for heading to be displayed on each page.
void menu(); //Fx for displaying program options.
void searchMenu(); //Fx for displaying searching options.
void addBook(); //Fx for writing data to file.
void displayBooks();//Fx for reading data from file. 
//Function for searching data from file. 
void searchByID(); 
void searchByTitle();
void searchByCategory();
void searchByPrice();
void searchByAuthor();
void dispose(); //Fx to shift books from main file to other file.
void modify(); //Fx to modify the book details.
void displayDisposed();//Fx to display the list of disposed off books

/////////////////////////////////// Global Functions Definitions ///////////////////////////////////

//Fx for drawing line on screen.
void drawLine(char ch)
{
for(int i=1;i<80;i++)
cout<<ch;
cout<<endl;
}

void heading()
{
drawLine('+');
cout<<"\t\tL I B R A R Y   M A N A G E M E N T   S Y S T E M\n";
drawLine('+');
}

//Fx for adding new book in file.
void addBook()
{
ofstream fout;
fout.open("books.dat",ios::app);
l.getBook();
fout.write((char*)&l,sizeof(l));
cout<<"Book data saved in file...\n";
fout.close();
}

//Fx for reading data from file. 
void displayBooks()
{
ifstream fin("books.dat");
int rec=0;
while(fin.read((char*)&l,sizeof(l)))
{
if(rec<1)
l.header();
l.listView();
rec++;
}
fin.close();
cout<<"\nTotal "<<rec<<" Records in file...\n";
}

//Fx for searching data from file. 
void searchByID()
{
int n,flag=0;
ifstream fin("books.dat");
cout<<"Enter Book ID : ";
cin>>n;
while(fin.read((char*)&l,sizeof(l)))
{
if(n==l.getID())
{
l.showBook();
flag++;
}
}
fin.close();
if(flag==0)
cout<<"Book Number with ID:"<<n<<" not available...\n";
}

//Fx for searching data from file.
void searchByTitle()
{
int flag=0;
char title[20];
ifstream fin("books.dat");
cout<<"Enter Book Title : ";
cin.ignore();
cin.getline(title,20);
while(fin.read((char*)&l,sizeof(l)))
{
if(strcmpi(title,l.getTitle())==0)
{
l.showBook();
flag++;
}
}
fin.close();
if(flag==0)
cout<<"Book with Title: "<<title<<" not available...\n";
}

//Fx for searching data from file.
void searchByCategory()
{
int flag=0,rec=0;
char cat[20];
ifstream fin("books.dat");
cout<<"Enter Book Category : ";
cin.ignore();
cin.getline(cat,20);
while(fin.read((char*)&l,sizeof(l)))
{
if(strcmpi(cat,l.getCategory())==0)
{
if(rec<1)
l.header();
l.listView();
flag++;
rec++;
}
}
fin.close();
if(flag==0)
cout<<"Book with Category: "<<cat<<" not available...\n";
}

//Fx for searching data from file.
void searchByAuthor()
{
int flag=0,rec=0;
char aut[20];
ifstream fin("books.dat");
cout<<"Enter Book Author : ";
cin.ignore();
cin.getline(aut,20);
while(fin.read((char*)&l,sizeof(l)))
{
if(strcmpi(aut,l.getAuthor())==0)
{
if(rec<1)
l.header();
l.listView();
flag++;
rec++;
}
}
fin.close();
if(flag==0)
cout<<"Book with Author name: "<<aut<<" not available...\n";
}

//Fx for searching data from file.
void searchByPrice()
{
int flag=0,rec=0;
float minrate, maxrate;
ifstream fin("books.dat");
cout<<"Enter Minimum Price of Book : ";
cin>>minrate;
cout<<"Enter Maximum Price of Book : ";
cin>>maxrate;

while(fin.read((char*)&l,sizeof(l)))
{
if(l.getPrice()>=minrate && l.getPrice()<=maxrate)
{
if(rec<1)
l.header();
l.listView();
flag++;
rec++;
}
}
fin.close();
if(flag==0)
cout<<"Books between Price Range: "<<minrate
    <<" and "<<maxrate<<" not available...\n";
}

//Fx for shifting books from main file to dispose file.
void dispose()
{
int n,flag=0;
ifstream fin("books.dat");
ofstream fout("dispose.dat",ios::out);
cout<<"Enter Book ID : ";
cin>>n;
while(fin.read((char*)&l,sizeof(l)))
{
if(n==l.getID())
{
l.showBook();
flag++;
}
else
{
fout.write((char*)&l,sizeof(l));
}
}
fin.close();
fout.close();
if(flag==0)
cout<<"Book Number with ID:"<<n<<" not available...\n";
}

//Fx for modifying data in file.
void modify()
{
int n,flag=0,pos;
fstream fin("books.dat",ios::in|ios::out);
cout<<"Enter Book ID : ";
cin>>n;
while(fin.read((char*)&l,sizeof(l)))
{
if(n==l.getID())
{
pos=fin.tellg();
cout<<"Following data will be edited...\n";
l.showBook();
flag++;
fin.seekg(pos-sizeof(l));
l.getBook();
fin.write((char*)&l,sizeof(l));
cout<<"\nData Modified successfully...\n";
}
}
fin.close();
if(flag==0)
cout<<"Book Number with ID:"<<n<<" not available...\n";
}

//Fx to display the list of disposed off books
void displayDisposed()
{
ifstream fin("dispose.dat");
int rec=0;
while(fin.read((char*)&l,sizeof(l)))
{
if(rec<1)
l.header();
l.listView();
rec++;
}
fin.close();
cout<<"\nTotal "<<rec<<" Records in disposed off file...\n";
}

//Fx for displaying program options.
void menu()
{
int ch;
do
{
system("cls");
heading();
cout<<"0. EXIT.\n";
cout<<"1. Add New Book\n";
cout<<"2. Display All Books\n";
cout<<"3. Search Books\n";
cout<<"4. Disposed Off Books\n";
cout<<"5. Modify Details\n";
cout<<"6. List of Disposed Books\n";
cout<<"Enter Your Choice : ";
cin>>ch;
system("cls");
heading();
switch(ch)
{
case 1: system("COLOR 5E"); addBook(); break;
case 2: system("COLOR 5F"); displayBooks(); break;
case 3: system("COLOR 6E"); searchMenu(); break;
case 4: system("COLOR 6F"); dispose(); break;
case 5: system("COLOR 4E"); modify(); break;
case 6: system("COLOR 4F"); displayDisposed(); break;
}
system("pause");
}while(ch!=0);
}

void searchMenu()
{
int ch;
do
{
system("cls");
heading();
cout<<"BOOK SEARCH OPTIONS\n";
cout<<"0. Back\n";
cout<<"1. By ID\n";
cout<<"2. By Title\n";
cout<<"3. By Category\n";
cout<<"4. By Author\n";
cout<<"5. By Price Range\n";
cout<<"Enter Your Choice : ";
cin>>ch;
system("cls");
heading();
switch(ch)
{
case 1: system("COLOR 5E"); searchByID(); break;
case 2: system("COLOR 6E"); searchByTitle(); break;
case 3: system("COLOR 5F"); searchByCategory(); break;
case 4: system("COLOR 6F"); searchByAuthor(); break;
case 5: system("COLOR 4F"); searchByPrice();break;
default: cout<<"\a";
}
system("pause");
}while(ch!=0);
}

int main()
{
system("COLOR 70");
menu();
return 0;
}