#include<iostream.h>
#include<stdio.h>
#include<conio.h>
#include <string.h>
#include <stdlib.h>
#include <graphics.h>
#define NORMAL 7;


class lib
{
 private:
	FILE *fp,*ft,*fe;
	int sl;
	long int entry_no;
	char nw,ch;


	struct stud
	{
	 int roll,sno,sl,dt,mn,yr;
	 char name[30];
	 char c_c[15];
	}i,r,q;

	struct book
	{
	 int sno;
	 char name[30];
	 char auth[30];
	 char pub[25];
	 float price;
	}b;
 public:
	int  menu(int color,int r,int c,int np,char *menu_list[]);
	void newentry();
	void booklist();
	void bookissue();
	void issuelist();
	void bookreturn();
	void returnlist();
	void delreturn();
	void modifyentry();
	void flash();


};






int lib::menu(int color,int r,int c,int np,char *menu_list[])
   {
  int r1=r+(np-1),k=0,i=0,j=1,r2=r;
  textattr(color);gotoxy(c,r2);cprintf(menu_list[0]);
  r2++;
  textattr(919);
  textcolor(7);
  for(j=1;j<np;j++,r2++)
  {
   gotoxy(c,r2);cprintf(menu_list[j]);
  }
  do
  {
    k=getch();
    switch(k)
    {
      case 80 :
		gotoxy(c,r);textattr(919);textcolor(7);cprintf(menu_list[i]);
		r++;
		i++;
		if(r>r1)
		{
		 r=r1-(np-1);
		 i=0;
		 gotoxy(c,r);textattr(color);cprintf(menu_list[i]);
		}
		 gotoxy(c,r);textattr(color);cprintf(menu_list[i]);
		 break;
      case 72  :
		gotoxy(c,r);textattr(919);textcolor(7);cprintf(menu_list[i]);
		r--;
		i--;
		if(r<r1 -(np-1))
		{
		 r=r1;
		 i=np-1;
		 gotoxy(c,r);textattr(color);cprintf(menu_list[i]);
		}
		 gotoxy(c,r);textattr(color);cprintf(menu_list[i]);
		 break;
    }
   }while(k!=13);
  return i+1;
}









void lib::flash()
{

  textattr(745);
  gotoxy(25,3);cprintf("               [LIBRARY MANAGEMENT]               ");
  textattr(7);
  gotoxy(3,23);cprintf("Designed  By : Sujit Kr. Nayak");
  gotoxy(3,25);cprintf("M.Tech ELDT, Tezpur University");
  textattr(7);
}






void lib::newentry()
{
  int temp=0;

  fp = fopen ("DBASE.DAT","rb+");
  if(fp == NULL)
  {
   fp = fopen ("DBASE.DAT","wb+");
   if(fp == NULL)
    {
     puts("Can not open file");
     exit(0);
     }
   }
  entry_no=sizeof(b);
  fseek(fp,0,SEEK_END);
  nw='y';
  rewind(fp);
  while(fread(&b,entry_no,1,fp)==1)
  {
   temp=b.sno;
   }
  while(nw=='y')
  {
   textbackground(9);
   clrscr();
   flash();
   textattr(697);
   textcolor(692);
   gotoxy(3,4);cprintf("               [BOOKS]               ");
   textattr(7);
   b.sno=temp+1;
   temp++;
   gotoxy(10,10);cout<<"Book No		: "<<b.sno;
   flushall();
   gotoxy(10,11);cout<<"Title		: ";
   gets(b.name);
   flushall();
   gotoxy(10,12);cout<<"Author		: ";
   gets(b.auth);
   flushall();
   gotoxy(10,13);cout<<"Publication	: ";
   gets(b.pub);
   flushall();
   gotoxy(10,14);cout<<"Price		: ";
   cin>>b.price;
   flushall();
   gotoxy(10,16);cout<<"Do you want to save(Y/N) ? : ";
   nw=getche();
   if(nw!='y')
    temp--;
   else
    fwrite(&b,entry_no,1,fp);
   gotoxy(10,17);cout<<"Add nw records(Y/N) ? : ";
   fflush(stdin);
   nw=getche();
  }
  clrscr();
  return;
}




void lib::booklist()
{
  int c=1;

  fp = fopen ("DBASE.DAT","rb+");

  entry_no=sizeof(b);
  rewind(fp);
  textbackground(9);
  clrscr();
  flash();
  textattr(697);
  textcolor(692);
  gotoxy(3,4);cprintf("               [ BOOK LIST ]               ");
  textattr(7);
  gotoxy(2,7);cout<<"Book No.	Title            Author		Publication    	 	Price ";

gotoxy(2,8);cout<<"-----------------------------------------------------------------------------";
  while (fread (&b,entry_no,1,fp) == 1)
  {
  flash();
  textattr(697);
  textcolor(692);
  gotoxy(3,4);cprintf("               [   BOOKS  ]               ");
  textattr(7);
  gotoxy(2,8+c);
  cprintf(" %-6d ",b.sno);
  cprintf(" %-20.20s ",b.name);
  cprintf(" %-18.18s ",b.auth);
  cprintf(" %-15.15s",b.pub);
  cprintf(" %9.2f ",b.price);
  c++;
  if(c>11)
   {
    c=1;
    gotoxy(55,20);
    cout<<"Press key to next";
    getch();
    textbackground(9);
    clrscr();
    flash();
    textattr(697);
    textcolor(692);
    gotoxy(3,4);cprintf("               [   BOOKS  ]               ");
    textattr(7);
    gotoxy(2,7);cout<<"B.No	  Title			Author		Publication     	Price ";
	
gotoxy(2,8);cout<<"-----------------------------------------------------------------------------";
   }
  }
  gotoxy(60,20);cout<<"End of List";
  getch();
  clrscr();
  return;
}







void lib::bookissue()
{
  int temp=0,tem=0;
  fp = fopen ("ISU.DAT","rb+");
  if(fp == NULL)
    {
     fp = fopen ("ISU.DAT","wb+");
     if(fp == NULL)
      {
       puts("Can not open file");
       exit(0);
      }
    }
  ft=fopen("DBASE.DAT","rb");
  entry_no=sizeof(i);
  fseek(fp,0,SEEK_END);
  nw='y';
  ch='y';
  rewind(fp);
  while(fread(&i,entry_no,1,fp)==1)
   temp=sl;
  while(nw=='y')
  {
   textbackground(9);
   clrscr();
   flash();
   textattr(697);
   textcolor(692);
   gotoxy(3,4);cprintf("               [       BOOKS     ]               ");
   textattr(7);
   sl=temp+1;
   temp++;
   flushall();
   gotoxy(10,11);cout<<"Book_No : ";
   cin>>i.sno;
   flushall();
   rewind(ft);
   while(fread(&b,sizeof(b),1,ft)==1)
   {
    if (i.sno==b.sno)
     {
      tem=i.sno;
      rewind(fp);
      while(fread(&i,entry_no,1,fp)==1)
      {
       if(tem==i.sno)
	{

gotoxy(2,7);cout<<"-----------------------------------------------------------------------------";
gotoxy(2,8);cout<<"B.No : "<<i.sno<<" IS NOT PRESENT ... ! PLEASE ENTRER NEW BOOK NUMBER";
gotoxy(2,9);cout<<"-----------------------------------------------------------------------------";
	 goto a;
	}
      }
      i.sno=tem;
      gotoxy(2,7);cout<<"B.No		Title        	  Author	Publication     	Price  ";

gotoxy(2,8);cout<<"-----------------------------------------------------------------------------";
gotoxy(2,9);printf(" %-6d  %-20.20s  %-18.18s  %-15.15s %9.2f",b.sno,b.name,b.auth,b.pub,b.price);
gotoxy(2,10);cout<<"-----------------------------------------------------------------------------";
      gotoxy(10,12);cout<<"Roll_No  : ";
      cin>>i.roll;
      flushall();
      gotoxy(10,13);cout<<"Student Name  : ";
      gets(i.name);
      flushall();
      gotoxy(10,14);cout<<"Course Code   : ";
      gets(i.c_c);
      flushall();
      gotoxy(10,15);cout<<"Issue Date    : ";
      cin>>i.dt;
      gotoxy(28,15);cout<<"-";cin>>i.mn;
      gotoxy(31,15);cout<<"-";cin>>i.yr;
      flushall();
      gotoxy(10,17);cout<<"Do you want to save(Y/N) ? : ";
      ch=getche();
      if(ch=='y')
       fwrite(&i,entry_no,1,fp);
       goto a;
      }
   }

gotoxy(2,7);cout<<"-----------------------------------------------------------------------------";
gotoxy(2,8);cout<<"BOOK_NO: "<<i.sno<<" IS NOT IN LIBRARY... ! ";
gotoxy(2,9);cout<<"-----------------------------------------------------------------------------";
   a:
    gotoxy(10,18);cout<<"Issue nw Book (Y/N) ? : ";
    fflush(stdin);
    nw=getche();
  }
  clrscr();
  fclose(ft);
  fclose(fp);
  return;
}

void lib::bookreturn()
{
  int temp=0;
  FILE *fm,*ff;
  fp = fopen ("RETN.DAT","rb+");
  if(fp == NULL)
   {
    fp = fopen ("RETN.DAT","wb+");
    if(fp == NULL)
     {
      puts("Can not open file");
      exit(0);
     }
   }
  ft=fopen("DBASE.DAT","rb");
  fe=fopen ("ISU.DAT","rb+");
  entry_no=sizeof(r);
  fseek(fp,0,SEEK_END);
  nw='y';
  ch='y';
  rewind(fp);
  while(fread(&r,entry_no,1,fp)==1)
  {
   temp=r.sl;
   }
  while(nw=='y')
  {
   textbackground(9);
   clrscr();
   flash();
   textattr(697);
   textcolor(692);
   gotoxy(3,4);cprintf("               [   BOOKS  ]               ");
   textattr(7);
   r.sl=temp+1;
   temp++;
   gotoxy(10,11);cout<<"Book No       : ";
   cin>>r.sno;
   flushall();
   rewind(ft);
   while(fread(&b,sizeof(b),1,ft)==1)
   {
    if (r.sno==b.sno)
     {
      rewind(fe);
      while(fread(&i,sizeof(i),1,fe)==1)
      {
       if(r.sno==i.sno)
       {
	gotoxy(2,7);cout<<"B.No  	Title        	 Issued To          Roll		Course    	Issued_Date  ";

gotoxy(2,8); cout<<"-----------------------------------------------------------------------------";
	
gotoxy(2,9); cprintf(" %-6d  %-17.17s  %-16.16s   %-5d  %-8.8s%02d-%02d-%02d ",i.sno,b.name,i.name,i.roll,i.c_c,i.dt,i.mn,i.yr);

gotoxy(2,10); cout<<"-----------------------------------------------------------------------------";
	gotoxy(10,12);cout<<"Roll No  : ";
	cin>>r.roll;
	flushall();
	gotoxy(10,13);cout<<"Student Name  : ";
	gets(r.name);
	flushall();
	gotoxy(10,14);cout<<"Course Code   : ";
	gets(r.c_c);
	flushall();
	gotoxy(10,15);cout<<"Return Date   : ";
	cin>>r.dt;
	gotoxy(28,15);cout<<"-";cin>>r.mn;
	gotoxy(31,15);cout<<"-";cin>>r.yr;
	flushall();


	gotoxy(10,16);cout<<"Do you want to save(Y/N) ? : ";
	ch=getche();
	if(ch=='y')
	{
	 fwrite(&r,entry_no,1,fp);
	 fm=fopen("TEMP.DAT","wb");
	 rewind(fe);
	 while(fread(&i,sizeof(i),1,fe)==1)
	 {
	  if(r.sno!=i.sno)
	  fwrite(&i,sizeof(i),1,fm);
	 }
	 fclose(fe);
	 fclose(fm);
	 remove("ISU.DAT");
	 rename("TEMP.DAT","ISU.DAT");
	 fe=fopen("ISU.DAT","rb+");
	}
	goto a;
       }
      }
     }
   }

gotoxy(2,7); cout<<"-----------------------------------------------------------------------------";
gotoxy(2,8);cout<<"BOOK_NO: "<<r.sno<<" IS NOT ISSUED BOOK ! ";
gotoxy(2,9);cout<<"-----------------------------------------------------------------------------";
   a:
    gotoxy(10,17);cout<<"Return nw Book (Y/N) ? : ";
    fflush(stdin);
    nw=getche();
  }
  clrscr();
  fclose(ft);
  fclose(fp);
  fclose(fe);
  return;
}




void lib::issuelist()
{
  int c=1;
  fp = fopen("ISU.DAT","rb+");
  ft = fopen("DBASE.DAT","rb+");
  entry_no=sizeof(i);
  rewind(fp);
  textbackground(9);
  clrscr();
  flash();
  textattr(697);
  textcolor(692);
  gotoxy(3,4);cprintf("               [   ISSUED BOOK DETAILS   ]               ");
  textattr(7);
  gotoxy(2,7);cout<<" Issued To        Roll  	Course  	 Book_No	Title    		Issur Date ";

gotoxy(2,8);cout<<"-----------------------------------------------------------------------------";
  while (fread (&i,entry_no,1,fp) == 1)
  {
  flash();
  textattr(697);
  textcolor(692);
  gotoxy(3,4);cprintf("               [   ISSUED BOOK DETAILS   ]               ");
  textattr(7);
  gotoxy(2,8+c);
  cprintf(" %-15.15s ",i.name);
  cprintf(" %-3d ",i.roll);
  cprintf(" %-6.6s ",i.c_c);
  cprintf("  %-5d",i.sno);
  fflush(stdin);
    rewind(ft);
   while(fread(&b,sizeof(b),1,ft)==1)
   {
    if (i.sno==b.sno)
    {
     cprintf(" %-14.14s  ",b.name);
     cprintf(" %-10.10s ",b.auth);
     }
    }
  cprintf(" %02d-%02d-%02d  ",i.dt,i.mn,i.yr);
  c++;
  if(c>10)
   {
    c=1;
    gotoxy(55,20);cout<<"Press key to next ";
    getch();
    textbackground(9);
    clrscr();
    flash();
    textattr(697);
    textcolor(692);
    gotoxy(3,4);cprintf("               [ ISSUED BOOK DETAILS     ]               ");
    textattr(7);
    gotoxy(2,7);cout<<"Sl.No. 		Issued To        Roll  		Course   Book_No		Title       	Issur Date ";

gotoxy(2,8);cout<<"-----------------------------------------------------------------------------";
   }
  }
  gotoxy(60,20);cout<<"End of List ";
  getch();
  clrscr();
  return;
}




void lib::returnlist()
{
  int c=1;
  fp = fopen ("RETN.DAT","rb+");
  ft = fopen ("DBASE.DAT","rb+");
  entry_no=sizeof(r);
  rewind(fp);
  textbackground(9);
  clrscr();
  flash();
  textattr(697);
  textcolor(692);
  gotoxy(3,4);cprintf("               [  RETURNED BOOK DETAILS  ]               ");
  textattr(7);
  gotoxy(2,7);cout<<"Sl.No.		Retn By     	 Roll  	Course 	Book_No  	Title    	  	 Retn_Date";

gotoxy(2,8);cout<<"-----------------------------------------------------------------------------";
  while (fread (&r,entry_no,1,fp) == 1)
  {
   flash();
   textattr(697);
   textcolor(692);
   gotoxy(3,4);cprintf("               [  RETURNED BOOK DETAILS ]               ");
   textattr(7);
   gotoxy(2,8+c);
   cprintf(" %-5d",r.sl);
   cprintf(" %-16.16s ",r.name);
   cprintf(" %-3d ",r.roll);
   cprintf(" %-8.8s ",r.c_c);
   cprintf(" %-5d ",r.sno);
   rewind(ft);
   while(fread(&b,sizeof(b),1,ft)==1)
   {
    if (r.sno==b.sno)
    cprintf(" %-16.16s  ",b.name);
    }
   cprintf(" %02d-%02d-%02d   ",r.dt,r.mn,r.yr);
   c++;
   if(c>10)
    {
    c=1;
    gotoxy(55,20);
    cout<<"Press key to next ";
    getch();
    textbackground(9);
    clrscr();
    flash();
    textattr(697);
    textcolor(692);
    gotoxy(3,4);cprintf("               [  RETURNED BOOK DETAILS  ]               ");
    textattr(7);
    gotoxy(2,7);cout<<"B.No. 		Retn By    	  Roll  	Course  Book_No  	Title       	Retrn_Date";

gotoxy(2,8);cout<<"-----------------------------------------------------------------------------";
    }
  }
  gotoxy(60,20);cout<<"End of List ";
  getch();
  clrscr();
  return;
}

void lib::modifyentry()
{
 int sn;
 fp=fopen("DBASE.DAT","rb+");
 entry_no=sizeof(b);
 nw='y';
 while(nw=='y')
   {
    textbackground(9);
    clrscr();
    flash();
    textattr(697);
    textcolor(692);
    gotoxy(3,4);cprintf("               [      MODIFY      ]               ");
    textattr(7);
    gotoxy(10,8);cout<<"Enter Book_No to Modify: ";
    cin>>sn;
    rewind(fp);
    while(fread(&b,entry_no,1,fp)==1)
     {
      if(sn==b.sno)
       {
	clrscr();
	flash();
	textattr(697);
	textcolor(692);
	gotoxy(3,4);cprintf("               [MODIFY RECORDS]               ");
	textattr(7);
	gotoxy(2,7);printf("Book_No  		Book_Name          	  Author	sPublication  		 Price ");

gotoxy(2,8);cout<<"-----------------------------------------------------------------------------";
gotoxy(2,9);printf(" %-6d  %-20.20s  %-18.18s  %-15.15s%9.2f",b.sno,b.name,b.auth,b.pub,b.price);

gotoxy(2,10);cout<<"-----------------------------------------------------------------------------";
	gotoxy(10,12);cout<<"Enter new entries: ";
	gotoxy(10,13);cout<<"Book No       : "<<b.sno;
	flushall();
	gotoxy(10,14);cout<<"Title    : ";
	gets(b.name);
	flushall();
	gotoxy(10,15);cout<<"Author        : ";
	gets(b.auth);
	flushall();
	gotoxy(10,16);cout<<"Publication   : ";
	gets(b.pub);
	flushall();
	gotoxy(10,17);cout<<"Price         : ";
	cin>>b.price;
	fflush(stdin);
	fseek(fp,-entry_no,SEEK_CUR);
	fwrite(&b,entry_no,1,fp);
       }
      else
       {
	flash();
	textattr(697);
	textcolor(692);
	gotoxy(3,4);cprintf("               [      MODIFY      ]               ");
	textattr(7);
	gotoxy(10,12);cout<<"\t\t\tNO RECORD FOUND... !!";
       }
     }
     gotoxy(45,19);cout<<" Modify new records(Y/N) ? : ";
     fflush(stdin);
     nw=getche();
   }
  clrscr();
  fclose(fp);
  return;
}




void lib::delreturn()
{
 int sn;
 fp=fopen("RETN.DAT","rb+");
 entry_no=sizeof(r);
 nw='y';
 while(nw=='y')
   {
    textbackground(9);
    clrscr();
    flash();
    textattr(697);
    textcolor(692);
    gotoxy(3,4);cprintf("               [      DELETE      ]               ");
    textattr(7);
    gotoxy(10,8);cout<<"Enter Book No to Delete: ";
    cin>>sn;
    ft=fopen("TEMP.DAT","wb");
    rewind(fp);
    while(fread(&r,entry_no,1,fp)==1)
     {
      if(sn!=r.sno)
	fwrite(&r,entry_no,1,ft);
      }
    fclose(fp);
    fclose(ft);
    remove("RETN.DAT");
    rename("TEMP.DAT","RETN.DAT");
    fp=fopen("RETN.DAT","rb+");
    textbackground(9);
    clrscr();
    flash();
    textattr(697);
    textcolor(692);
    gotoxy(3,4);cprintf("               [      DELETE      ]               ");
    textattr(7);
    gotoxy(10,12);cout<<"\t\t\tRECORD DELETED... !!";
    gotoxy(45,19);cout<<"Delete nw(Y/N) ? : ";
    fflush(stdin);
    nw=getche();
   }
 clrscr();
 fclose(fp);
 return;
}



int main()
{
  lib p,retrn,query,issue;
  int m,x=9;
  static char *menu_list[]={"01. BOOK LIST","02. ISSUED BOOK LIST","03. RETURNED BOOKS","04. ISSUE BOOK ","05. RETURN BOOK","06. NEW BOOK ENTRY ","07. MODIFY BOOK ENTRY","08. DELETE RETURN LIST","09. EXIT"};

  do
  {
   textbackground(9);
   clrscr();
   p.flash();
   textcolor(692);
   textattr(917);
   textcolor(2);
   gotoxy(28,21); cprintf("Select Option and Press Enter");


   m=p.menu(498,7,30,x,menu_list);
   gotoxy(70,24);
   if(m==1)
    {
     flushall();
     textattr(7);
     clrscr();
     p.booklist();
    }
   if(m==2)
    {
     flushall();
     textattr(7);
     clrscr();
     issue.issuelist();
    }
   if(m==3)
    {
    flushall();
    textattr(7);
    clrscr();
    retrn.returnlist();
    }
   if(m==4)
   {
   flushall();
   textattr(7);
   clrscr();
   issue.bookissue();
   }
   if(m==5)
   {
   flushall();
   textattr(7);
   clrscr();
   retrn.bookreturn();
   }
   if(m==6)
   {
   flushall();
   textattr(7);
   clrscr();
   p.newentry();
   }
   if(m==7)
   {
   flushall();
   textattr(7);
   clrscr();
   p.modifyentry();
   }
   if(m==8)
   {
   flushall();
   textattr(7);
   clrscr();
   retrn.delreturn();
   }

   if(m==9)
   {
   flushall();
   textattr(7);
   clrscr();
   exit(0);
   }
  }while(m!=9);






 return 0;
}