#include<fstream.h>
#include<conio.h>
#include<stdio.h>
#include<process.h>
#include<string.h>
#include<iomanip.h>

//***************************************************************
//                   CLASS USED IN PROJECT
//****************************************************************



class book
{
char bno[6];
char bname[50];
char aname[20];
  public:
void create_book()
{
cout<<"\nNEW BOOK ENTRY...\n";
cout<<"\nEnter The book no.";
cin>>bno;
cout<<"\n\nEnter The Name of The Book ";
gets(bname);
cout<<"\n\nEnter The Author's Name ";
gets(aname);
cout<<"\n\n\nBook Created..";
}

void show_book()
{
cout<<"\nBook no. : "<<bno;
cout<<"\nBook Name : ";
puts(bname);
cout<<"Author Name : ";
puts(aname);
}

void modify_book()
{
cout<<"\nBook no. : "<<bno;
cout<<"\nModify Book Name : ";
gets(bname);
cout<<"\nModify Author's Name of Book : ";
gets(aname);
}

char* retbno()
{
return bno;
}

void report()
{cout<<bno<<setw(30)<<bname<<setw(30)<<aname<<endl;}


};         //class ends here




class student
{
char admno[6];
char name[20];
char stbno[6];
int token;
public:
void create_student()
{
clrscr();
cout<<"\nNEW STUDENT ENTRY...\n";
cout<<"\nEnter The admission no. ";
cin>>admno;
cout<<"\n\nEnter The Name of The Student ";
gets(name);
token=0;
stbno[0]='/0';
cout<<"\n\nStudent Record Created..";
}

void show_student()
{
cout<<"\nAdmission no. : "<<admno;
cout<<"\nStudent Name : ";
puts(name);
cout<<"\nNo of Book issued : "<<token;
if(token==1)
cout<<"\nBook No "<<stbno;
}

void modify_student()
{
cout<<"\nAdmission no. : "<<admno;
cout<<"\nModify Student Name : ";
gets(name);
}

char* retadmno()
{
return admno;
}

char* retstbno()
{
return stbno;
}

int rettoken()
{
return token;
}

void addtoken()
{token=1;}

void resettoken()
{token=0;}

void getstbno(char t[])
{
strcpy(stbno,t);
}

void report()
{cout<<"\t"<<admno<<setw(20)<<name<<setw(10)<<token<<endl;}

};         //class ends here




//***************************************************************
//     global declaration for stream object, object
//****************************************************************

fstream fp,fp1;
book bk;
student st;


//***************************************************************
//     function to write in file
//****************************************************************

void write_book()
{
char ch;
fp.open("book.dat",ios::out|ios::app);
do
{
clrscr();
bk.create_book();
fp.write((char*)&bk,sizeof(book));
cout<<"\n\nDo you want to add more record..(y/n?)";
cin>>ch;
}while(ch=='y'||ch=='Y');
fp.close();
}

void write_student()
{
char ch;
fp.open("student.dat",ios::out|ios::app);
do
{
st.create_student();
fp.write((char*)&st,sizeof(student));
cout<<"\n\ndo you want to add more record..(y/n?)";
cin>>ch;
}while(ch=='y'||ch=='Y');
fp.close();
}


//***************************************************************
//     function to read specific record from file
//****************************************************************


void display_spb(char n[])
{
cout<<"\nBOOK DETAILS\n";
int flag=0;
fp.open("book.dat",ios::in);
while(fp.read((char*)&bk,sizeof(book)))
{
if(strcmpi(bk.retbno(),n)==0)
{
bk.show_book();
flag=1;
}
}

fp.close();
if(flag==0)
cout<<"\n\nBook does not exist";
getch();
}

void display_sps(char n[])
{
cout<<"\nSTUDENT DETAILS\n";
int flag=0;
fp.open("student.dat",ios::in);
while(fp.read((char*)&st,sizeof(student)))
{
if((strcmpi(st.retadmno(),n)==0))
{
st.show_student();
flag=1;
}
}

fp.close();
if(flag==0)
    cout<<"\n\nStudent does not exist";
  getch();
}


//***************************************************************
//     function to modify record of file
//****************************************************************


void modify_book()
{
char n[6];
int found=0;
clrscr();
cout<<"\n\n\tMODIFY BOOK REOCORD.... ";
cout<<"\n\n\tEnter The book no. of The book";
cin>>n;
fp.open("book.dat",ios::in|ios::out);
while(fp.read((char*)&bk,sizeof(book)) && found==0)
{
if(strcmpi(bk.retbno(),n)==0)
{
bk.show_book();
cout<<"\nEnter The New Details of book"<<endl;
bk.modify_book();
int pos=-1*sizeof(bk);
    fp.seekp(pos,ios::cur);
    fp.write((char*)&bk,sizeof(book));
    cout<<"\n\n\t Record Updated";
    found=1;
}
}

    fp.close();
    if(found==0)
    cout<<"\n\n Record Not Found ";
    getch();
}


void modify_student()
{
char n[6];
int found=0;
clrscr();
cout<<"\n\n\tMODIFY STUDENT RECORD... ";
cout<<"\n\n\tEnter The admission no. of The student";
cin>>n;
fp.open("student.dat",ios::in|ios::out);
while(fp.read((char*)&st,sizeof(student)) && found==0)
{
if(strcmpi(st.retadmno(),n)==0)
{
st.show_student();
cout<<"\nEnter The New Details of student"<<endl;
st.modify_student();
int pos=-1*sizeof(st);
fp.seekp(pos,ios::cur);
fp.write((char*)&st,sizeof(student));
cout<<"\n\n\t Record Updated";
found=1;
}
}

fp.close();
if(found==0)
cout<<"\n\n Record Not Found ";
getch();
}

//***************************************************************
//     function to delete record of file
//****************************************************************


void delete_student()
{
char n[6];
int flag=0;
clrscr();
    cout<<"\n\n\n\tDELETE STUDENT...";
    cout<<"\n\nEnter The admission no. of the Student You Want To Delete : ";
    cin>>n;
    fp.open("student.dat",ios::in|ios::out);
    fstream fp2;
    fp2.open("Temp.dat",ios::out);
    fp.seekg(0,ios::beg);
    while(fp.read((char*)&st,sizeof(student)))
{
if(strcmpi(st.retadmno(),n)!=0)
    fp2.write((char*)&st,sizeof(student));
else
  flag=1;
}
   
fp2.close();
    fp.close();
    remove("student.dat");
    rename("Temp.dat","student.dat");
    if(flag==1)
      cout<<"\n\n\tRecord Deleted ..";
    else
      cout<<"\n\nRecord not found";
    getch();
}


void delete_book()
{
char n[6];
clrscr();
cout<<"\n\n\n\tDELETE BOOK ...";
cout<<"\n\nEnter The Book no. of the Book You Want To Delete : ";
cin>>n;
fp.open("book.dat",ios::in|ios::out);
fstream fp2;
fp2.open("Temp.dat",ios::out);
fp.seekg(0,ios::beg);
while(fp.read((char*)&bk,sizeof(book)))
{
if(strcmpi(bk.retbno(),n)!=0)
{
fp2.write((char*)&bk,sizeof(book));
}
}
   
fp2.close();
    fp.close();
    remove("book.dat");
    rename("Temp.dat","book.dat");
    cout<<"\n\n\tRecord Deleted ..";
    getch();
}



//***************************************************************
//     function to display all students list
//****************************************************************

void display_alls()
{
clrscr();
      fp.open("student.dat",ios::in);
      if(!fp)
      {
        cout<<"ERROR!!! FILE COULD NOT BE OPEN ";
        getch();
        return;
      }

cout<<"\n\n\t\tSTUDENT LIST\n\n";
cout<<"==================================================================\n";
cout<<"\tAdmission No."<<setw(10)<<"Name"<<setw(20)<<"Book Issued\n";
cout<<"==================================================================\n";

while(fp.read((char*)&st,sizeof(student)))
{
st.report();
}
     
fp.close();
getch();
}


//***************************************************************
//     function to display Books list
//****************************************************************

void display_allb()
{
clrscr();
fp.open("book.dat",ios::in);
if(!fp)
{
cout<<"ERROR!!! FILE COULD NOT BE OPEN ";
        getch();
        return;
      }

cout<<"\n\n\t\tBook LIST\n\n";
cout<<"=========================================================================\n";
cout<<"Book Number"<<setw(20)<<"Book Name"<<setw(25)<<"Author\n";
cout<<"=========================================================================\n";

while(fp.read((char*)&bk,sizeof(book)))
{
bk.report();
}
      fp.close();
      getch();
}



//***************************************************************
//     function to issue book
//****************************************************************

void book_issue()
{
char sn[6],bn[6];
int found=0,flag=0;
clrscr();
cout<<"\n\nBOOK ISSUE ...";
cout<<"\n\n\tEnter The student's admission no.";
cin>>sn;
fp.open("student.dat",ios::in|ios::out);
    fp1.open("book.dat",ios::in|ios::out);
    while(fp.read((char*)&st,sizeof(student)) && found==0)
        {
if(strcmpi(st.retadmno(),sn)==0)
{
found=1;
if(st.rettoken()==0)
{
      cout<<"\n\n\tEnter the book no. ";
cin>>bn;
while(fp1.read((char*)&bk,sizeof(book))&& flag==0)
{
  if(strcmpi(bk.retbno(),bn)==0)
{
bk.show_book();
flag=1;
st.addtoken();
st.getstbno(bk.retbno());
        int pos=-1*sizeof(st);
fp.seekp(pos,ios::cur);
fp.write((char*)&st,sizeof(student));
cout<<"\n\n\t Book issued successfully\n\nPlease Note: Write current date
in backside of book and submit within 15 days fine Rs. 1 for each day
after 15 days period";
}
    }
  if(flag==0)
    cout<<"Book no does not exist";
}
    else
  cout<<"You have not returned the last book ";

}
}
      if(found==0)
cout<<"Student record not exist...";
getch();
  fp.close();
  fp1.close();
}

//***************************************************************
//     function to deposit book
//****************************************************************

void book_deposit()
{
    char sn[6],bn[6];
    int found=0,flag=0,day,fine;
    clrscr();
    cout<<"\n\nBOOK DEPOSIT ...";
    cout<<"\n\n\tEnter The student’s admission no.";
    cin>>sn;
    fp.open("student.dat",ios::in|ios::out);
    fp1.open("book.dat",ios::in|ios::out);
    while(fp.read((char*)&st,sizeof(student)) && found==0)
       {
   if(strcmpi(st.retadmno(),sn)==0)
   {
   found=1;
   if(st.rettoken()==1)
   {
while(fp1.read((char*)&bk,sizeof(book))&& flag==0)
{
  if(strcmpi(bk.retbno(),st.retstbno())==0)
{
bk.show_book();
flag=1;
cout<<"\n\nBook deposited in no. of days";
cin>>day;
if(day>15)
{
  fine=(day-15)*1;
  cout<<"\n\nFine has to deposited Rs. "<<fine;
}
st.resettoken();
int pos=-1*sizeof(st);
fp.seekp(pos,ios::cur);
fp.write((char*)&st,sizeof(student));
cout<<"\n\n\t Book deposited successfully";
}
   }
 if(flag==0)
   cout<<"Book no does not exist";
     }
else
cout<<"No book is issued..please check!!";
}
  }
      if(found==0)
cout<<"Student record not exist...";
getch();
  fp.close();
  fp1.close();
  }




//***************************************************************
//     INTRODUCTION FUNCTION
//****************************************************************

void intro()
{
clrscr();
gotoxy(35,11);
cout<<"LIBRARY";
gotoxy(35,14);
cout<<"MANAGEMENT";
gotoxy(35,17);
cout<<"SYSTEM";
cout<<"\n\nMADE BY : YOUR NAME";
cout<<"\n\nSCHOOL : SCHOOL NAME";
getch();
}



//***************************************************************
//     ADMINISTRATOR MENU FUNCTION
//****************************************************************

void admin_menu()
{
clrscr();
int ch2;
cout<<"\n\n\n\tADMINISTRATOR MENU";
cout<<"\n\n\t1.CREATE STUDENT RECORD";
cout<<"\n\n\t2.DISPLAY ALL STUDENTS RECORD";
cout<<"\n\n\t3.DISPLAY SPECIFIC STUDENT RECORD ";
cout<<"\n\n\t4.MODIFY STUDENT RECORD";
cout<<"\n\n\t5.DELETE STUDENT RECORD";
cout<<"\n\n\t6.CREATE BOOK ";
cout<<"\n\n\t7.DISPLAY ALL BOOKS ";
cout<<"\n\n\t8.DISPLAY SPECIFIC BOOK ";
cout<<"\n\n\t9.MODIFY BOOK ";
cout<<"\n\n\t10.DELETE BOOK ";
cout<<"\n\n\t11.BACK TO MAIN MENU";
cout<<"\n\n\tPlease Enter Your Choice (1-11) ";
cin>>ch2;
switch(ch2)
{
    case 1: clrscr();
    write_student();break;
    case 2: display_alls();break;
    case 3:
      char num[6];
      clrscr();
      cout<<"\n\n\tPlease Enter The Admission No. ";
      cin>>num;
      display_sps(num);
      break;
      case 4: modify_student();break;
      case 5: delete_student();break;
case 6: clrscr();
write_book();break;
case 7: display_allb();break;
case 8: {
      char num[6];
      clrscr();
      cout<<"\n\n\tPlease Enter The book No. ";
      cin>>num;
      display_spb(num);
      break;
}
      case 9: modify_book();break;
      case 10: delete_book();break;
      case 11: return;
      default:cout<<"\a";
    }
    admin_menu();
}


//***************************************************************
//     THE MAIN FUNCTION OF PROGRAM
//****************************************************************


void main()
{
char ch;
intro();
do
{
clrscr();
cout<<"\n\n\n\tMAIN MENU";
cout<<"\n\n\t01. BOOK ISSUE";
cout<<"\n\n\t02. BOOK DEPOSIT";
  cout<<"\n\n\t03. ADMINISTRATOR MENU";
  cout<<"\n\n\t04. EXIT";
  cout<<"\n\n\tPlease Select Your Option (1-4) ";
  ch=getche();
  switch(ch)
  {
case '1':clrscr();
book_issue();
  break;
  case '2':book_deposit();
    break;
  case '3':admin_menu();
break;
  case '4':exit(0);
  default :cout<<"\a";
}
    }while(ch!='4');
}

***************************************************************
   END OF PROJECT



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