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C++ Project on Library Management

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//**********************************************************
//    PROJECT BOOK LIBRARY
//**********************************************************

//**********************************************************
//    INCLUDED HEADER FILES
//**********************************************************

# include <iostream.h>
# include <fstream.h>
# include <process.h>
# include <string.h>
# include <stdlib.h>
# include <stdio.h>
# include <ctype.h>
# include <conio.h>
# include <dos.h>

//**********************************************************
// THIS CLASS CONTROL ALL THE FUNCTIONS IN THE MENU
//**********************************************************

class MENU
{
public :
void main_menu(void) ;
void introduction(void) ;
private :
void edit_menu(void) ;
void edit_book(void) ;
void edit_member(void) ;
} ;

//**********************************************************
// THIS CLASS CONTAINS FUNCTIONS RELATED TO BOOKS
//**********************************************************

class BOOK
{
public :
void list(void) ;
char *bookname(int) ;
protected :
void add_new_book(int, char tname[33], char tauthor[26], float, int, int) ;
void update_copies(int, int, int) ;
void modify(int, char[], char[], float) ;
void deletion(void) ;
int  book_found(int) ;
int  bookname_found(char []) ;
int  recordno(int) ;
int  available(int) ;
char *authorname(int) ;
float bookprice(int) ;
int  no_of_copies(int) ;
int  bookcodeof(char[]) ;
void display(int) ;
int  reccount(void) ;
void delete_rec(int) ;
private :
int   bookcode, copies ;
char  name[33], author[26] ;
float price ;
int   avail ;

} ;

//**********************************************************
// THIS CLASS CONTAINS FUNCTIONS RELATED TO MEMBERS
//**********************************************************

class MEMBER
{
public :
void list(void) ;
protected :
void add_mem(int, int, char [], char [], char[], int, int, int) ;
void modify(int, char[], char[], char[]) ;
void deletion(void) ;
int  member_found(int) ;
void update_book(int, int, int, int, int) ;
char *membername(int) ;
char *memberphone(int) ;
char *memberaddress(int) ;
int  recordno(int) ;
int  lastcode(void) ;
int  issued(int) ;
int  fine(int) ;
void display(int) ;
void delete_rec(int) ;
private :
int  memcode, bookcode ;
char name[26], phone[10], address[33] ;
int  dd, mm, yy ;   // DATE OF RETURNING THE BOOK //
} ;

//**********************************************************
// THIS IS DERIVED FROM CLASS BOOK & MEMBER AND CONTAINS
// FUNCTIONS FOR WORKING (ISSUE,RETURN,ETC).
//**********************************************************

class WORKING : public BOOK, public MEMBER
{
public :
void issuebook(void) ;
void returnbook(void) ;
void add_book(void) ;
void add_member(void) ;
void modify_book(void) ;
void modify_member(void) ;
void delete_book(void) ;
void delete_member(void) ;
} ;

//**********************************************************
// THIS CLASS CONTAINS FUNCTIONS RELATED DATE & FINE
//**********************************************************

class DATE
{
public :
void extend_date(int,int,int,int) ;
int  diff(int, int, int, int, int, int) ;
int  day, mon, year ;
} ;

//**********************************************************
// FUNCTION TO EXTEND GIVEN DATE BY 15 DAYS
//**********************************************************

void DATE :: extend_date(int d1, int m1, int y1, int days)
{
static int month[] = {31,29,31,30,31,30,31,31,30,31,30,31} ;
for (int i=1; i<=days; i++)
{
d1++ ;
if ((d1 > month[m1-1]) || (y1%4 != 0 && m1 == 2 && d1 > 28))
{
d1 = 1 ;
m1++ ;
}
if (m1 > 12)
{
m1 = 1 ;
y1++ ;
}
}
day  = d1 ;
mon  = m1 ;
year = y1 ;
}

//**********************************************************
// THIS FUNCTION RETURN THE DIFFERENCE BETWEEN TWO GIVEN
// DATES
//**********************************************************

int DATE :: diff(int d1, int m1, int y1, int d2, int m2, int y2)
{
int days = 0 ;
if ((y2<y1) || (y2==y1 && m2<m1) || (y2==y1 && m2==m1 && d2<d1))
return days ;
static int month[] = {31,29,31,30,31,30,31,31,30,31,30,31} ;
while (d1 != d2 || m1 != m2 || y1 != y2)
{
days++ ;
d1++ ;
if ((d1 > month[m1-1]) || (y1%4 != 0 && m1 == 2 && d1 > 28))
{
d1 = 1 ;
m1++ ;
}
if (m1 > 12)
{
m1 = 1 ;
y1++ ;
}
}
return days ;
}

//**********************************************************
// FUNCTION TO DISPLAY MAIN MENU & CONTROL ALL THE FUNCTION
// IN THE MAIN MENU.
//**********************************************************

void MENU :: main_menu(void)
{
char ch ;
while (1)
{
clrscr() ;
gotoxy(29,6) ;
cout <<“B O O K  L I B R A R Y” ;
gotoxy(29,7) ;
cout <<“~~~~~~~~~~~~~~~~~~~~~~” ;
gotoxy(30,10) ;
cout <<“1. INTRODUCTION” ;
gotoxy(30,11) ;
cout <<“2. ADD NEW BOOK” ;
gotoxy(30,12) ;
cout <<“3. ADD NEW MEMBER” ;
gotoxy(30,13) ;
cout <<“4. ISSUE BOOK” ;
gotoxy(30,14) ;
cout <<“5. RETURN BOOK” ;
gotoxy(30,15) ;
cout <<“6. LIST OF BOOKS” ;
gotoxy(30,16) ;
cout <<“7. LIST OF MEMBERS” ;
gotoxy(30,17) ;
cout <<“8. EDIT” ;
gotoxy(30,18) ;
cout <<“0. QUIT” ;
gotoxy(30,20) ;
cout <<“Enter your choice : ” ;
ch = getche() ;
if (ch == 27)
break ;
else
if (ch == ‘1’)
introduction() ;
else
if (ch == ‘2’)
{
WORKING W ;
W.add_book() ;
}
else
if (ch == ‘3’)
{
WORKING W ;
W.add_member() ;
}
else
if (ch == ‘4’)
{
WORKING W ;
W.issuebook() ;
}
else
if (ch == ‘5’)
{
WORKING W ;
W.returnbook() ;
}
else
if (ch == ‘6’)
{
BOOK B ;
B.list() ;
}
else
if (ch == ‘7’)
{
MEMBER M ;
M.list() ;
}
else
if (ch == ‘8’)
edit_menu() ;
else
if (ch == ‘0’)
break ;
}
}

//**********************************************************
// FUNCTION TO DISPLAY EDIT MENU
//**********************************************************

void MENU :: edit_menu(void)
{
char ch ;
while (1)
{
clrscr() ;
gotoxy(32,9) ;
cout <<“E D I T  M E N U”;
gotoxy(32,10) ;
cout <<“~~~~~~~~~~~~~~~~” ;
gotoxy(34,13) ;
cout <<“1. BOOKS” ;
gotoxy(34,14) ;
cout <<“2. MEMBERS” ;
gotoxy(34,15) ;
cout <<“0. EXIT” ;
gotoxy(31,17) ;
cout <<“Enter your choice : ” ;
ch = getche() ;
if (ch == 27)
break ;
else
if (ch ==’1′)
edit_book() ;
else
if (ch == ‘2’)
edit_member() ;
else
if (ch == ‘0’)
break ;
}
}

//**********************************************************
// FUNCTION TO DISPLAY EDIT MENU FOR BOOK & CONTROL
// ALL THE FUNCTION IN THE EDIT MENU.
//**********************************************************

void MENU :: edit_book(void)
{
char ch ;
while (1)
{
clrscr() ;
gotoxy(31,9) ;
cout <<“E D I T  B O O K S”;
gotoxy(31,10) ;
cout <<“~~~~~~~~~~~~~~~~~~” ;
gotoxy(34,13) ;
cout <<“1. MODIFY” ;
gotoxy(34,14) ;
cout <<“2. DELETE” ;
gotoxy(34,15) ;
cout <<“0. EXIT” ;
gotoxy(31,17) ;
cout <<“Enter your choice : ” ;
ch = getche() ;
if (ch == 27)
break ;
else
if (ch == ‘1’)
{
WORKING W ;
W.modify_book() ;
}
else
if (ch == ‘2’)
{
WORKING W ;
W.delete_book() ;
}
else
if (ch == ‘0’)
break ;
}
}

//**********************************************************
// FUNCTION TO DISPLAY EDIT MENU FOR MEMBERS & CONTROL
// ALL THE FUNCTION IN THE EDIT MENU.
//**********************************************************

void MENU :: edit_member(void)
{
char ch ;
while (1)
{
clrscr() ;
gotoxy(29,9) ;
cout <<“E D I T  M E M B E R S”;
gotoxy(29,10) ;
cout <<“~~~~~~~~~~~~~~~~~~~~~~” ;
gotoxy(34,13) ;
cout <<“1. MODIFY” ;
gotoxy(34,14) ;
cout <<“2. DELETE” ;
gotoxy(34,15) ;
cout <<“0. EXIT” ;
gotoxy(29,17) ;
cout <<“Enter your choice : ” ;
ch = getche() ;
if (ch == 27)
break ;
else
if (ch == ‘1’)
{
WORKING W ;
W.modify_member() ;
}
else
if (ch == ‘2’)
{
WORKING W ;
W.delete_member() ;
}
else
if (ch == ‘0’)
break ;
}
}

//**********************************************************
// FUNCTION TO DISPLAY THE INTRODUCTION FOR THE PROJECT.
//**********************************************************

void MENU :: introduction(void)
{
clrscr() ;
gotoxy(31,5) ;
cout <<“Welcome to Project” ;
textcolor(BLACK+BLINK) ; textbackground(WHITE) ;
gotoxy(33,7) ;
cprintf(” BOOK LIBRARY “) ;
textcolor(LIGHTGRAY) ; textbackground(BLACK) ;
gotoxy(15,10) ;
cout <<“This  project has facility of maintaining  records” ;
gotoxy(15,11) ;
cout <<“of BOOKS and MEMBERS.” ;
gotoxy(15,13) ;
cout <<“This  project  can  hold more  than  10,000  books” ;
gotoxy(15,14) ;
cout <<“records.” ;
gotoxy(15,16) ;
cout <<“One member can issue one book at a time. If he/she” ;
gotoxy(15,17) ;
cout <<“does  not return book upto 15 days he/she have  to” ;
gotoxy(15,18) ;
cout <<“pay fine of Rs.2/- per day.” ;
textcolor(LIGHTGRAY+BLINK) ;
gotoxy(27,24) ;
cprintf(“Press any key to continue”) ;
textcolor(LIGHTGRAY) ;
getch() ;
}

//**********************************************************
// THIS FUNCTION RETURN 0 IF GIVEN BOOK CODE NOT FOUND
//**********************************************************

int BOOK :: book_found(int tcode)
{
fstream file ;
file.open(“BOOK.DAT”, ios::in) ;
file.seekg(0,ios::beg) ;
int found=0 ;
while (file.read((char *) this, sizeof(BOOK)))
{
if (bookcode == tcode)
{
found = 1 ;
break ;
}
}
file.close() ;
return found ;
}

//**********************************************************
// THIS FUNCTION RETURN 0 IF GIVEN BOOK NAME NOT FOUND
//**********************************************************

int BOOK :: bookname_found(char t1code[33])
{
fstream file ;
file.open(“BOOK.DAT”, ios::in) ;
file.seekg(0,ios::beg) ;
int found=0 ;
while (file.read((char *) this, sizeof(BOOK)))
{
if (!strcmpi(name,t1code))
{
found = 1 ;
break ;
}
}
file.close() ;
return found ;
}

//**********************************************************
// THIS FUNCTION RETURN RECORD NO. FOR THE BOOK CODE
//**********************************************************

int BOOK :: recordno(int tcode)
{
fstream file ;
file.open(“BOOK.DAT”, ios::in) ;
file.seekg(0,ios::beg) ;
int count=0 ;
while (file.read((char *) this, sizeof(BOOK)))
{
count++ ;
if (bookcode == tcode)
break ;
}
file.close() ;
return count ;
}

//**********************************************************
// THIS FUNCTION RETURNS THE AVAILABLE COPIES FOR THE GIVEN
// BOOK CODE.
//**********************************************************

int BOOK :: available(int tcode)
{
fstream file ;
file.open(“BOOK.DAT”, ios::in) ;
file.seekg(0,ios::beg) ;
int tavail=0 ;
while (file.read((char *) this, sizeof(BOOK)))
{
if (bookcode == tcode)
{
tavail = avail ;
break ;
}
}
file.close() ;
return tavail ;
}

//**********************************************************
// THIS FUNCTION RETURNS THE NO. OF COPIES FOR THE GIVEN
// BOOK CODE.
//**********************************************************

int BOOK :: no_of_copies(int tcode)
{
fstream file ;
file.open(“BOOK.DAT”, ios::in) ;
file.seekg(0,ios::beg) ;
int tcopies=0 ;
while (file.read((char *) this, sizeof(BOOK)))
{
if (bookcode == tcode)
{
tcopies = copies ;
break ;
}
}
file.close() ;
return tcopies ;
}

//**********************************************************
// THIS FUNCTION RETURNS THE BOOK NAME OF THE GIVEN BOOK
// CODE.
//**********************************************************

char *BOOK :: bookname(int tcode)
{
fstream file ;
file.open(“BOOK.DAT”, ios::in) ;
file.seekg(0,ios::beg) ;
char tname[33] ;
while (file.read((char *) this, sizeof(BOOK)))
{
if (bookcode == tcode)
{
strcpy(tname,name) ;
break ;
}
}
file.close() ;
return tname ;
}

//**********************************************************
// THIS FUNCTION RETURNS THE AUTHOR NAME OF THE GIVEN BOOK
// CODE.
//**********************************************************

char *BOOK :: authorname(int tcode)
{
fstream file ;
file.open(“BOOK.DAT”, ios::in) ;
file.seekg(0,ios::beg) ;
char tauthor[26] ;
while (file.read((char *) this, sizeof(BOOK)))
{
if (bookcode == tcode)
{
strcpy(tauthor,author) ;
break ;
}
}
file.close() ;
return tauthor ;
}

//**********************************************************
// THIS FUNCTION RETURNS THE BOOK PRICE OF THE GIVEN BOOK
// CODE.
//**********************************************************

float BOOK :: bookprice(int tcode)
{
fstream file ;
file.open(“BOOK.DAT”, ios::in) ;
file.seekg(0,ios::beg) ;
float tprice=0.0 ;
while (file.read((char *) this, sizeof(BOOK)))
{
if (bookcode == tcode)
{
tprice = price ;
break ;
}
}
file.close() ;
return tprice ;
}

//**********************************************************
// THIS FUNCTION RETURNS THE BOOK CODE OF THE GIVEN BOOK
// NAME.
//**********************************************************

int BOOK :: bookcodeof(char t1code[33])
{
fstream file ;
file.open(“BOOK.DAT”, ios::in) ;
file.seekg(0,ios::beg) ;
int tcode=0 ;
while (file.read((char *) this, sizeof(BOOK)))
{
if (!strcmpi(name,t1code))
{
tcode = bookcode ;
break ;
}
}
file.close() ;
return tcode ;
}

//**********************************************************
// THIS FUNCTION RETURNS THE NO. OF THE RECORDS IN THE BOOK
// FILE.
//**********************************************************

int BOOK :: reccount(void)
{
fstream file ;
file.open(“BOOK.DAT”, ios::in) ;
file.seekg(0,ios::beg) ;
int count=0 ;
while (file.read((char *) this, sizeof(BOOK)))
count++ ;
file.close() ;
return count ;
}

//**********************************************************
// THIS FUNCTION DELETES THE RECORD OF THE GIVEN BOOK CODE.
//**********************************************************

void BOOK :: delete_rec(int tcode)
{
fstream file ;
file.open(“BOOK.DAT”, ios::in) ;
fstream temp ;
temp.open(“temp.dat”, ios::out) ;
file.seekg(0,ios::beg) ;
while ( !file.eof() )
{
file.read((char *) this, sizeof(BOOK)) ;
if ( file.eof() )
break ;
if ( bookcode != tcode )
temp.write((char *) this, sizeof(BOOK)) ;
}
file.close() ;
temp.close() ;
file.open(“BOOK.DAT”, ios::out) ;
temp.open(“temp.dat”, ios::in) ;
temp.seekg(0,ios::beg) ;
while ( !temp.eof() )
{
temp.read((char *) this, sizeof(BOOK)) ;
if ( temp.eof() )
break ;
file.write((char *) this, sizeof(BOOK)) ;
}
file.close() ;
temp.close() ;
}

//**********************************************************
// THIS FUNCTION ADD THE RECORD IN THE BOOK FILE
//**********************************************************

void BOOK :: add_new_book(int tcode,char tname[33], char tauthor[26], float tprice, int tcopies, int tavail)
{
fstream file ;
file.open(“BOOK.DAT”, ios::app) ;
bookcode = tcode ;
strcpy(name,tname) ;
strcpy(author,tauthor) ;
price = tprice ;
copies = tcopies ;
avail = tavail ;
file.write((char *) this, sizeof(BOOK)) ;
file.close() ;
}

//**********************************************************
// THIS FUNCTION UPDATE THE RECORD IN THE BOOK FILE FOR THE
// GIVEN BOOK CODE
//**********************************************************

void BOOK :: update_copies(int tcode, int tcopies, int tavail)
{
int recno ;
recno = recordno(tcode) ;
fstream file ;
file.open(“BOOK.DAT”, ios::out | ios::ate) ;
copies = tcopies ;
avail = tavail ;
int location ;
location = (recno-1) * sizeof(BOOK) ;
file.seekp(location) ;
file.write((char *) this, sizeof(BOOK)) ;
file.close() ;
}

//**********************************************************
// THIS FUNCTION MODIFY THE RECORD IN THE BOOK FILE FOR THE
// GIVEN BOOK CODE
//**********************************************************

void BOOK :: modify(int tcode, char tname[33], char tauthor[26], float tprice)
{
int recno ;
recno = recordno(tcode) ;
fstream file ;
file.open(“BOOK.DAT”, ios::out | ios::ate) ;
strcpy(name,tname) ;
strcpy(author,tauthor) ;
price = tprice ;
int location ;
location = (recno-1) * sizeof(BOOK) ;
file.seekp(location) ;
file.write((char *) this, sizeof(BOOK)) ;
file.close() ;
}

//**********************************************************
// THIS FUNCTION DISPLAY THE RECORD FROM THE BOOK FILE
// FOR THE GIVEN BOOK CODE
//**********************************************************

void BOOK :: display(int tcode)
{
fstream file ;
file.open(“BOOK.DAT”, ios::in) ;
file.seekg(0,ios::beg) ;
while (file.read((char *) this, sizeof(BOOK)))
{
if (bookcode == tcode)
{
gotoxy(5,5) ;
cout <<“Book Code   : ” <<bookcode ;
gotoxy(5,7) ;
cout <<“Book Name   : ” <<name ;
gotoxy(5,8) ;
cout <<“Author Name : ” <<author ;
gotoxy(5,9) ;
cout <<“Price       : Rs.” <<price ;
gotoxy(5,10) ;
cout <<“Copies      : ” <<price ;
gotoxy(5,11) ;
cout <<“Available   : ” <<avail ;
break ;
}
}
file.close() ;
}

//**********************************************************
// THIS FUNCTION DISPLAY THE LIST OF BOOKS.
//**********************************************************

void BOOK :: list(void)
{
clrscr() ;
int row = 6 , found=0, flag=0 ;
char ch ;
gotoxy(33,2) ;
cout <<“LIST OF BOOKS” ;
gotoxy(32,3) ;
cout <<“~~~~~~~~~~~~~~~” ;
gotoxy(1,4) ;
cout <<“CODE  BOOK NAME                        AUTHOR                    PRICE  COPIES” ;
gotoxy(1,5) ;
cout <<“~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~” ;
fstream file ;
file.open(“BOOK.DAT”, ios::in) ;
file.seekg(0,ios::beg) ;
while (file.read((char *) this, sizeof(BOOK)))
{
flag = 0 ;
delay(20) ;
found = 1 ;
gotoxy(2,row) ;
cout <<bookcode ;
gotoxy(7,row) ;
cout    <<name ;
gotoxy(40,row) ;
cout    <<author ;
gotoxy(66,row) ;
cout    <<price ;
gotoxy(73,row) ;
cout <<copies ;
textbackground(WHITE) ; textcolor(BLACK) ;
gotoxy(40,row+1) ;
cprintf(“STATUS: “) ;
textcolor(BLACK+BLINK) ;
cprintf(“%d copies available”,avail) ;
textbackground(BLACK) ; textcolor(LIGHTGRAY) ;
if ( row == 22 )
{
flag = 1 ;
row = 6 ;
gotoxy(1,25) ;
cout <<“Press any key to continue or Press <ESC> to exit” ;
ch = getch() ;
if (ch == 27)
break ;
clrscr() ;
gotoxy(33,2) ;
cout <<“LIST OF BOOKS” ;
gotoxy(32,3) ;
cout <<“~~~~~~~~~~~~~~~” ;
gotoxy(1,4) ;
cout <<“CODE  BOOK NAME                        AUTHOR                    PRICE  COPIES” ;
gotoxy(1,5) ;
cout <<“~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~” ;
}
else
row = row + 2 ;
}
if (!found)
{
gotoxy(5,10) ;
cout <<“\7Records not found” ;
}
if (!flag)
{
gotoxy(1,25) ;
cout <<“Press any key to continue…” ;
getche() ;
}
file.close () ;
}

//**********************************************************
// THIS FUNCTION RETURN 0 IF THE GIVEN MEMBER CODE NOT FOUND
//**********************************************************

int MEMBER :: member_found(int mcode)
{
fstream file ;
file.open(“MEMBER.DAT”, ios::in) ;
file.seekg(0,ios::beg) ;
int found=0 ;
while (file.read((char *) this, sizeof(MEMBER)))
{
if (memcode == mcode)
{
found = 1 ;
break ;
}
}
file.close() ;
return found ;
}

//**********************************************************
// THIS FUNCTION RETURN 0 IF THE MEMBER HAVE NOT ISSUED ANY
// BOOK.
//**********************************************************

int MEMBER :: issued(int mcode)
{
fstream file ;
file.open(“MEMBER.DAT”, ios::in) ;
file.seekg(0,ios::beg) ;
int missue=0 ;
while (file.read((char *) this, sizeof(MEMBER)))
{
if (memcode == mcode)
{
missue = bookcode ;
break ;
}
}
file.close() ;
return missue ;
}

//**********************************************************
// THIS FUNCTION CALCULATE AND RETURN FINE FOR THE GIVEN
// MEMBER CODE.
//**********************************************************

int MEMBER :: fine(int mcode)
{
DATE D ;
int d1, m1, y1 ;
struct date d;
getdate(&d);
d1 = d.da_day ;
m1 = d.da_mon ;
y1 = d.da_year ;
fstream file ;
file.open(“MEMBER.DAT”, ios::in) ;
file.seekg(0,ios::beg) ;
int days, t_fine ;
while (file.read((char *) this, sizeof(MEMBER)))
{
if (memcode == mcode)
{
days = D.diff(dd,mm,yy,d1,m1,y1) ;
t_fine = days * 2 ;
break ;
}
}
file.close() ;
return t_fine ;
}

//**********************************************************
// THIS FUNCTION RETURN THE LAST CODE OF THE MEMBER FILE.
//**********************************************************

int MEMBER :: lastcode(void)
{
fstream file ;
file.open(“MEMBER.DAT”, ios::in) ;
file.seekg(0,ios::beg) ;
int mcode=0 ;
while (file.read((char *) this, sizeof(MEMBER)))
mcode = memcode ;
file.close() ;
return mcode ;
}

//**********************************************************
// THIS FUNCTION RETURNS MEMBER NAME OF THE GIVEN MEMBER
// CODE.
//**********************************************************

char *MEMBER :: membername(int mcode)
{
fstream file ;
file.open(“MEMBER.DAT”, ios::in) ;
file.seekg(0,ios::beg) ;
char mname[26] ;
while (file.read((char *) this, sizeof(MEMBER)))
{
if (memcode == mcode)
{
strcpy(mname,name) ;
break ;
}
}
file.close() ;
return mname ;
}

//**********************************************************
// THIS FUNCTION RETURNS MEMBER PHONE OF THE GIVEN MEMBER
// CODE.
//**********************************************************

char *MEMBER :: memberphone(int mcode)
{
fstream file ;
file.open(“MEMBER.DAT”, ios::in) ;
file.seekg(0,ios::beg) ;
char mphone[10] ;
while (file.read((char *) this, sizeof(MEMBER)))
{
if (memcode == mcode)
{
strcpy(mphone,phone) ;
break ;
}
}
file.close() ;
return mphone ;
}

//**********************************************************
// THIS FUNCTION RETURNS MEMBER ADDRESS OF THE GIVEN MEMBER
// CODE.
//**********************************************************

char *MEMBER :: memberaddress(int mcode)
{
fstream file ;
file.open(“MEMBER.DAT”, ios::in) ;
file.seekg(0,ios::beg) ;
char maddress[33] ;
while (file.read((char *) this, sizeof(MEMBER)))
{
if (memcode == mcode)
{
strcpy(maddress,address) ;
break ;
}
}
file.close() ;
return maddress ;
}

//**********************************************************
// THIS FUNCTION RETURNS RECORD NO. OF THE GIVEN MEMBER
// CODE.
//**********************************************************

int MEMBER :: recordno(int mcode)
{
fstream file ;
file.open(“MEMBER.DAT”, ios::in) ;
file.seekg(0,ios::beg) ;
int count=0 ;
while (file.read((char *) this, sizeof(MEMBER)))
{
count++ ;
if (memcode == mcode)
break ;
}
file.close() ;
return count ;
}

//**********************************************************
// THIS FUNCTION DELETE RECORD FOR THE GIVEN MEMBER CODE.
//**********************************************************

void MEMBER :: delete_rec(int mcode)
{
fstream file ;
file.open(“MEMBER.DAT”, ios::in) ;
fstream temp ;
temp.open(“temp.dat”, ios::out) ;
file.seekg(0,ios::beg) ;
while ( !file.eof() )
{
file.read((char *) this, sizeof(MEMBER)) ;
if ( file.eof() )
break ;
if ( memcode != mcode )
temp.write((char *) this, sizeof(MEMBER)) ;
}
file.close() ;
temp.close() ;
file.open(“MEMBER.DAT”, ios::out) ;
temp.open(“temp.dat”, ios::in) ;
temp.seekg(0,ios::beg) ;
while ( !temp.eof() )
{
temp.read((char *) this, sizeof(MEMBER)) ;
if ( temp.eof() )
break ;
file.write((char *) this, sizeof(MEMBER)) ;
}
file.close() ;
temp.close() ;
}

//**********************************************************
// THIS FUNCTION UPDATE RECORD FOR THE GIVEN MEMBER CODE.
//**********************************************************

void MEMBER :: update_book(int mcode, int tcode, int d1, int m1, int y1)
{
fstream file ;
file.open(“MEMBER.DAT”, ios::in) ;
fstream temp ;
temp.open(“temp.dat”, ios::out) ;
file.seekg(0,ios::beg) ;
while ( !file.eof() )
{
file.read((char *) this, sizeof(MEMBER)) ;
if ( file.eof() )
break ;
if ( memcode == mcode )
{
bookcode = tcode ;
dd = d1 ;
mm = m1 ;
yy = y1 ;
temp.write((char *) this, sizeof(MEMBER)) ;
}
else
temp.write((char *) this, sizeof(MEMBER)) ;
}
file.close() ;
temp.close() ;
file.open(“MEMBER.DAT”, ios::out) ;
temp.open(“temp.dat”, ios::in) ;
temp.seekg(0,ios::beg) ;
while ( !temp.eof() )
{
temp.read((char *) this, sizeof(MEMBER)) ;
if ( temp.eof() )
break ;
file.write((char *) this, sizeof(MEMBER)) ;
}
file.close() ;
temp.close() ;
}

//**********************************************************
// THIS FUNCTION MODIFY RECORD FOR THE GIVEN MEMBER CODE.
//**********************************************************

void MEMBER :: modify(int mcode, char mname[26], char mphone[10], char maddress[33])
{
int recno ;
recno = recordno(mcode) ;
fstream file ;
file.open(“MEMBER.DAT”, ios::out | ios::ate) ;
strcpy(name,mname) ;
strcpy(phone,mphone) ;
strcpy(address,maddress) ;
int location ;
location = (recno-1) * sizeof(MEMBER) ;
file.seekp(location) ;
file.write((char *) this, sizeof(MEMBER)) ;
file.close() ;
}

//**********************************************************
// THIS FUNCTION ADD RECORD IN THE FILE FOR THE GIVEN
// MEMBER CODE.
//**********************************************************

void MEMBER :: add_mem(int mcode, int bcode, char mname[26], char maddress[33], char mphone[10], int d1, int m1, int y1)
{
fstream file ;
file.open(“MEMBER.DAT”, ios::app) ;
memcode = mcode ;
bookcode = bcode ;
strcpy(name,mname) ;
strcpy(address,maddress) ;
strcpy(phone,mphone) ;
dd = d1 ;
mm = m1 ;
yy = y1 ;
file.write((char *) this, sizeof(MEMBER)) ;
file.close() ;
}

//**********************************************************
// THIS FUNCTION DISPLAY THE RECORD FOR THE GIVEN MEMBER
// CODE.
//**********************************************************

void MEMBER :: display(int mcode)
{
fstream file ;
file.open(“MEMBER.DAT”, ios::in) ;
file.seekg(0,ios::beg) ;
while (file.read((char *) this, sizeof(MEMBER)))
{
if (memcode == mcode)
{
gotoxy(5,3) ;
cout <<“Member Code # ” <<mcode ;
gotoxy(5,4) ;
cout <<“~~~~~~~~~~~~~~~~~” ;
gotoxy(5,6) ;
cout <<“Name    : ” <<name ;
gotoxy(5,7) ;
cout <<“Phone   : ” <<phone ;
gotoxy(5,8) ;
cout <<“Address : ” <<address ;
break ;
}
}
file.close() ;
}

//**********************************************************
// THIS FUNCTION DISPLAY THE LIST OF THE MEMBERS
//**********************************************************

void MEMBER :: list(void)
{
clrscr() ;
BOOK B ;
int row = 6 , found=0, flag=0 ;
char ch ;
gotoxy(32,2) ;
cout <<“LIST OF MEMBERS” ;
gotoxy(31,3) ;
cout <<“~~~~~~~~~~~~~~~~~” ;
gotoxy(1,4) ;
cout <<“CODE  BOOK CODE   NAME           PHONE        ADDRESS” ;
gotoxy(1,5) ;
cout <<“~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~” ;
fstream file ;
file.open(“MEMBER.DAT”, ios::in) ;
file.seekg(0,ios::beg) ;
while (file.read((char *) this, sizeof(MEMBER)))
{
flag = 0 ;
delay(20) ;
found = 1 ;
gotoxy(2,row) ;
cout <<memcode ;
gotoxy(10,row) ;
cout <<bookcode ;
gotoxy(19,row) ;
cout    <<name ;
gotoxy(38,row) ;
cout <<phone ;
gotoxy(50,row);
cout<<address;
textbackground(WHITE) ; textcolor(BLACK) ;
gotoxy(7,row+1) ;
if (bookcode == 0)
cprintf(“BOOK NAME: (Not Issued)”) ;
else
{
cprintf(“BOOK NAME: %s”,B.bookname(bookcode)) ;
gotoxy(42,row+1) ;
cprintf(“Date of return: “) ;
textcolor(BLACK+BLINK) ;
cprintf(“%d/%d/%d”,dd,mm,yy) ;
}
textbackground(BLACK) ; textcolor(LIGHTGRAY) ;
if ( row == 22 )
{
flag = 1 ;
row = 6 ;
gotoxy(1,25) ;
cout <<“Press any key to continue or Press <ESC> to exit” ;
ch = getch() ;
if (ch == 27)
break ;
clrscr() ;
gotoxy(32,2) ;
cout <<“LIST OF MEMBERS” ;
gotoxy(31,3) ;
cout <<“~~~~~~~~~~~~~~~~~” ;
gotoxy(1,4) ;
cout <<“CODE  BOOK CODE   NAME                         PHONE” ;
gotoxy(1,5) ;
cout <<“~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~” ;
}
else
row = row + 2 ;
}
if (!found)
{
gotoxy(5,10) ;
cout <<“\7Records not found” ;
}
if (!flag)
{
gotoxy(1,25) ;
cout <<“Press any key to continue…” ;
getche() ;
}
file.close () ;
}

//**********************************************************
// THIS FUNCTION GIVES DATA TO ADD RECORD IN THE BOOK FILE.
//**********************************************************

void WORKING :: add_book(void)
{
if (!reccount())  // MEMBER FUNCTION OF BOOK
{
add_new_book(0,”null”,”null”,0.0,0,0) ;
BOOK::delete_rec(0) ;
}
char ch ;
int tcode, tcopies, tavail ;
char tname[33], tauthor[26] ;
float tprice=0.0 ;
do
{
int found=0, valid=0 ;
int tc ;
float t2=0.0 ;
char t[10], t1[10] ;
clrscr() ;
gotoxy(29,3) ;
cout <<“ADDITION OF THE BOOKS” ;
gotoxy(29,4) ;
cout <<“~~~~~~~~~~~~~~~~~~~~~” ;
gotoxy(72,1) ;
cout <<“<0>=Exit” ;
gotoxy(5,25) ;
cout <<“Enter code no. of the book” ;
gotoxy(5,5) ;
cout <<“Code no. ” ;
gets(t) ;
tc = atoi(t) ;
tcode = tc ;
if (tcode == 0)
return ;
if (book_found(tcode))
{
found = 1 ;
gotoxy(19,8) ;
cout <<bookname(tcode) ;
gotoxy(19,9) ;
cout <<authorname(tcode) ;
gotoxy(22,10) ;
cout <<bookprice(tcode) ;
}
gotoxy(5,8) ;
cout <<“Book Name   : ” ;
gotoxy(5,9) ;
cout <<“Author Name : ” ;
gotoxy(5,10) ;
cout <<“Price       : Rs.” ;
gotoxy(5,12) ;
cout <<“Copies      : ” ;
valid = 0 ;
while (!valid && !found)
{
valid = 1 ;
gotoxy(5,25) ; clreol() ;
cout <<“Enter the name of the book” ;
gotoxy(19,8) ; clreol() ;
gets(tname) ;
strupr(tname) ;
if (tname[0] == ‘0’)
return ;
if (strlen(tname) < 1 || strlen(tname) > 32)
{
valid = 0 ;
gotoxy(5,25) ; clreol() ;
cout <<“\7Enter correctly (Range: 1..32)” ;
getch() ;
}
}
valid = 0 ;
while (!valid && !found)
{
valid = 1 ;
gotoxy(5,25) ; clreol() ;
cout <<“Enter the author’s name of the book” ;
gotoxy(19,9) ; clreol() ;
gets(tauthor) ;
strupr(tauthor) ;
if (tauthor[0] == ‘0’)
return ;
if (strlen(tauthor) < 1 || strlen(tauthor) > 25)
{
valid = 0 ;
gotoxy(5,25) ; clreol() ;
cout <<“\7Enter correctly (Range: 1..25)” ;
getch() ;
}
}
valid = 0 ;
while (!valid && !found)
{
valid = 1 ;
gotoxy(5,25) ; clreol() ;
cout <<“Enter the price of the book” ;
gotoxy(22,10) ; clreol() ;
gets(t1) ;
t2 = atof(t1) ;
tprice = t2 ;
if (t1[0] == ‘0’)
return ;
if (tprice < 1 || tprice > 9999)
{
valid = 0 ;
gotoxy(5,25) ; clreol() ;
cout <<“\7Enter correctly” ;
getch() ;
}
}
valid = 0 ;
while (!valid)
{
valid = 1 ;
gotoxy(5,25) ; clreol() ;
cout <<“Enter no. of copies of book to be added” ;
gotoxy(19,12) ; clreol() ;
gets(t) ;
tc = atoi(t) ;
tcopies = tc ;
if (t[0] == ‘0’)
return ;
if (tcopies < 1 || tcopies > 50)
{
valid = 0 ;
gotoxy(5,25) ; clreol() ;
cout <<“\7Enter correctly” ;
getch() ;
}
}
tavail = available(tcode) + tcopies ;
tcopies = no_of_copies(tcode) + tcopies ;
gotoxy(5,25) ; clreol() ;
do
{
gotoxy(5,15) ; clreol() ;
cout <<“Do you want to save (y/n) : ” ;
ch = getche() ;
ch = toupper(ch) ;
} while (ch != ‘Y’ && ch != ‘N’) ;

if (ch == ‘Y’)
{
if (found)
update_copies(tcode,tcopies,tavail) ;
else
add_new_book(tcode,tname,tauthor,tprice,tcopies,tavail) ;
}
do
{
gotoxy(5,17) ; clreol() ;
cout <<“Do you want to add more (y/n) : ” ;
ch = getche() ;
ch = toupper(ch) ;
} while (ch != ‘Y’ && ch != ‘N’) ;
} while (ch == ‘Y’) ;
}

//**********************************************************
// THIS FUNCTION GIVES DATA TO ADD RECORD IN THE MEMBER FILE
//**********************************************************

void WORKING :: add_member(void)
{
char ch ;
int mcode, bcode ;
char mname[26], mphone[10], maddress[33] ;
int d1, m1, y1 ;
mcode = lastcode() ;
mcode++ ;
do
{
int valid=0 ;
clrscr() ;
gotoxy(28,3) ;
cout <<“ADDITION OF THE MEMBERS” ;
gotoxy(28,4) ;
cout <<“~~~~~~~~~~~~~~~~~~~~~~~” ;
gotoxy(72,1) ;
cout <<“<0>=Exit” ;
gotoxy(5,7) ;
cout <<“Member Code # ” <<mcode ;
gotoxy(5,8) ;
cout <<“~~~~~~~~~~~~~~~~~” ;
gotoxy(5,10) ;
cout <<“Name    : ” ;
gotoxy(5,12) ;
cout <<“Phone   : ” ;
gotoxy(5,14) ;
cout <<“Address : ” ;
do
{
valid = 1 ;
gotoxy(5,25) ; clreol() ;
cout <<“Enter the name of the New Member” ;
gotoxy(15,10) ; clreol() ;
gets(mname) ;
strupr(mname) ;
if (mname[0] == ‘0’)
return ;
if (strlen(mname) < 1 || strlen(mname) > 25)
{
valid = 0 ;
gotoxy(5,25) ; clreol() ;
cout <<“\7Enter correctly (Range: 1..25)” ;
getch() ;
}
} while (!valid) ;
do
{
valid = 1 ;
gotoxy(5,25) ; clreol() ;
cout <<“Enter Phone no. of the Member or Press <ENTER> for none” ;
gotoxy(15,12) ; clreol() ;
gets(mphone) ;
if (mphone[0] == ‘0’)
return ;
if ((strlen(mphone) < 7 && strlen(mphone) > 0) || (strlen(mphone) > 9))
{
valid = 0 ;
gotoxy(5,25) ; clreol() ;
cout <<“\7Enter correctly” ;
getch() ;
}
} while (!valid) ;
if (strlen(mphone) == 0)
strcpy(mphone,”-“) ;
do
{
valid = 1 ;
gotoxy(5,25) ; clreol() ;
cout <<“Enter the address of the New Member” ;
gotoxy(15,14) ; clreol() ;
gets(maddress) ;
strupr(maddress) ;
if (maddress[0] == ‘0’)
return ;
if (strlen(maddress) < 1 || strlen(maddress) > 32)
{
valid = 0 ;
gotoxy(5,25) ; clreol() ;
cout <<“\7Enter correctly (Range: 1..32)” ;
getch() ;
}
} while (!valid) ;
gotoxy(5,25) ; clreol() ;
do
{
gotoxy(5,17) ; clreol() ;
cout <<“Do you want to save (y/n) : ” ;
ch = getche() ;
ch = toupper(ch) ;
if (ch == ‘0’)
return ;
} while (ch != ‘Y’ && ch != ‘N’) ;
if (ch == ‘Y’)
{
bcode = 0 ;
d1 = 0 ;
m1 = 0 ;
y1 = 0 ;
add_mem(mcode,bcode,mname,maddress,mphone,d1,m1,y1) ;
mcode++ ;
}
do
{
gotoxy(5,19) ; clreol() ;
cout <<“Do you want to add more (y/n) : ” ;
ch = getche() ;
ch = toupper(ch) ;
if (ch == ‘0’)
return ;
} while (ch != ‘Y’ && ch != ‘N’) ;
} while (ch == ‘Y’) ;
}

//**********************************************************
// THIS FUNCTION ISSUES THE BOOK
//**********************************************************

void WORKING :: issuebook(void)
{
BOOK B ;
MEMBER M ;
DATE D ;
char t1code[33], ch ;
int t2code=0, tcode=0, mcode=0 ;
int valid ;
int d1, m1, y1 ;
struct date d;
getdate(&d);
d1 = d.da_day ;
m1 = d.da_mon ;
y1 = d.da_year ;
do
{
valid = 1 ;
while (1)
{
clrscr() ;
gotoxy(5,2) ;
cout <<“Date : ” <<d1 <<“/” <<m1 <<“/” <<y1 ;
gotoxy(72,1) ;
cout <<“<0>=Exit” ;
gotoxy(5,5) ;
cout <<“Enter Code or Name of the Book to be issued” ;
gotoxy(5,6) ;
cout <<”                  or                       ” ;
gotoxy(5,7) ;
cout <<“Press <ENTER> for help  ” ;
gets(t1code) ;
if (t1code[0] == ‘0’)
return ;
if (strlen(t1code) == 0)
B.list() ;
else
break ;
}
t2code = atoi(t1code) ;
tcode = t2code ;
if ((tcode == 0 && !bookname_found(t1code)) || (tcode != 0 && !book_found(tcode)))
{
valid = 0 ;
gotoxy(5,10) ;
cout <<“\7Record not found” ;
gotoxy(5,11) ;
cout <<“Press <ESC> to exit or any other key to continue…” ;
ch = getch() ;
if (ch == 27)
return ;
}
} while (!valid) ;
if (tcode == 0)
tcode = bookcodeof(t1code) ;
if (!available(tcode))
{
gotoxy(5,10) ;
cout <<“\7Sorry! Book (” <<bookname(tcode) <<“) is not available” ;
gotoxy(5,11) ;
cout <<“Kindly issue any other Book” ;
gotoxy(5,12) ;
cout <<“See List of Books” ;
getch() ;
return ;
}
do
{
valid = 1 ;
while (1)
{
clrscr() ;
gotoxy(72,1) ;
cout <<“<0>=Exit” ;
gotoxy(5,2) ;
cout <<“Date : ” <<d1 <<“/” <<m1 <<“/” <<y1 ;
gotoxy(5,5) ;
cout <<“Book Name: ” <<bookname(tcode) ;
gotoxy(5,7) ;
cout <<“Enter Code no. of the Member” ;
gotoxy(5,8) ;
cout <<”            or              ” ;
gotoxy(5,9) ;
cout <<“Press <ENTER> for help  ” ;
gets(t1code) ;
if (t1code[0] == ‘0’)
return ;
if (strlen(t1code) == 0)
M.list() ;
else
break ;
}
t2code = atoi(t1code) ;
mcode = t2code ;
if (mcode == 0)
{
valid = 0 ;
gotoxy(5,25) ;
cout <<“\7Enter Correctly” ;
getch() ;
}
if (!member_found(mcode) && valid)
{
valid = 0 ;
gotoxy(5,13) ;
cout <<“\7Record not found” ;
gotoxy(5,14) ;
cout <<“Press <ESC> to exit or any other key to continue…” ;
ch = getch() ;
if (ch == 27)
return ;
}
} while (!valid) ;
int tcopies, tavail ;
tcopies = no_of_copies(tcode) ;  // member function of BOOK
tavail  = available(tcode) – 1 ;  // member function of BOOK
update_copies(tcode,tcopies,tavail) ;  // member function of BOOK
D.extend_date(d1,m1,y1,15) ;
d1 = D.day ;
m1 = D.mon ;
y1 = D.year ;
update_book(mcode,tcode,d1,m1,y1) ;  // member function of MEMBER
gotoxy(5,13) ;
cout <<“\7Book is issued to ” <<membername(mcode) ;
gotoxy(5,15) ;
cout <<“Date of Return : ” <<d1 <<“/” <<m1 <<“/” <<y1 ;
getch() ;
}

//**********************************************************
// THIS FUNCTION RETURNS THE BOOK FOR THE MEMBER
//**********************************************************

void WORKING :: returnbook(void)
{
MEMBER M ;
char t1code[5], ch ;
int t2code=0, mcode=0, valid ;
int d1, m1, y1 ;
struct date d;
getdate(&d);
d1 = d.da_day ;
m1 = d.da_mon ;
y1 = d.da_year ;
do
{
valid = 1 ;
while (1)
{
clrscr() ;
gotoxy(72,1) ;
cout <<“<0>=Exit” ;
gotoxy(5,2) ;
cout <<“Date : ” <<d1 <<“/” <<m1 <<“/” <<y1 ;
gotoxy(5,7) ;
cout <<“Enter Code no. of the Member who wants to return book” ;
gotoxy(5,8) ;
cout <<”                        or              ” ;
gotoxy(5,9) ;
cout <<“Press <ENTER> for help  ” ;
gets(t1code) ;
if (t1code[0] == ‘0’)
return ;
if (strlen(t1code) == 0)
M.list() ;
else
break ;
}
t2code = atoi(t1code) ;
mcode = t2code ;
if (mcode == 0)
{
valid = 0 ;
gotoxy(5,25) ;
cout <<“\7Enter Correctly” ;
getch() ;
}
if (!member_found(mcode) && valid)
{
valid = 0 ;
gotoxy(5,13) ;
cout <<“\7Record not found” ;
gotoxy(5,14) ;
cout <<“Press <ESC> to exit or any other key to continue…” ;
ch = getch() ;
if (ch == 27)
return ;
}
if (!issued(mcode) && valid)
{
valid = 0 ;
gotoxy(5,13) ;
cout <<“\7Member have no book to return” ;
gotoxy(5,14) ;
cout <<“Press <ESC> to exit or any other key to continue…” ;
ch = getch() ;
if (ch == 27)
return ;
}
} while (!valid) ;
int bcode, tcopies, tavail ;
bcode = issued(mcode) ;
gotoxy(5,13) ;
cout <<“Book Code : ” <<bcode ;
gotoxy(5,14) ;
cout <<“Book Name : ” <<bookname(bcode) ;
tcopies = no_of_copies(bcode) ;
tavail = available(bcode) + 1 ;
int f ;
f = fine(mcode) ;
if (f != 0)
{
gotoxy(5,16) ;
cout <<“You have to pay a fine of Rs.” <<f ;
gotoxy(5,17) ;
cout <<“Please do not delay the Return of Book again” ;
}
update_copies(bcode,tcopies,tavail) ;
update_book(mcode,0,0,0,0) ;
gotoxy(5,19) ;
cout <<“\7Book has been returned” ;
getch() ;
}

//**********************************************************
// THIS FUNCTION GIVES DATA TO MODIFY THE BOOK RECORD
//**********************************************************

void WORKING :: modify_book(void)
{
BOOK B ;
char t1code[5], tname[33], tauthor[26], *t1, ch ;
int t2code=0, tcode=0 ;
float t2=0.0, tprice=0.0 ;
int valid ;
do
{
valid = 1 ;
while (1)
{
clrscr() ;
gotoxy(72,1) ;
cout <<“<0>=Exit” ;
gotoxy(5,5) ;
cout <<“Enter Code or Name of the Book to be modified” ;
gotoxy(5,6) ;
cout <<”                  or                       ” ;
gotoxy(5,7) ;
cout <<“Press <ENTER> for help  ” ;
gets(t1code) ;
if (t1code[0] == ‘0’)
return ;
if (strlen(t1code) == 0)
B.list() ;
else
break ;
}
t2code = atoi(t1code) ;
tcode = t2code ;
if ((tcode == 0 && !bookname_found(t1code)) || (tcode != 0 && !book_found(tcode)))
{
valid = 0 ;
gotoxy(5,10) ;
cout <<“\7Record not found” ;
gotoxy(5,11) ;
cout <<“Press <ESC> to exit or any other key to continue…” ;
ch = getch() ;
if (ch == 27)
return ;
}
} while (!valid) ;
if (tcode == 0)
tcode = bookcodeof(t1code) ;
clrscr() ;
gotoxy(72,1) ;
cout <<“<0>=Exit” ;
BOOK::display(tcode) ;
do
{
gotoxy(5,13) ; clreol() ;
cout <<“Do you want to modify this record (y/n) : ” ;
ch = getche() ;
ch = toupper(ch) ;
if (ch == ‘0’)
return ;
} while (ch != ‘Y’ && ch != ‘N’) ;
if (ch == ‘N’)
return ;
gotoxy(5,16) ;
cout <<“Book Name   : ” ;
gotoxy(5,17) ;
cout <<“Author Name : ” ;
gotoxy(5,18) ;
cout <<“Price       : Rs.” ;
do
{
valid = 1 ;
gotoxy(5,25) ; clreol() ;
cout <<“Enter the name of the book or <ENTER> for no change” ;
gotoxy(19,16) ; clreol() ;
gets(tname) ;
strupr(tname) ;
if (tname[0] == ‘0’)
return ;
if (strlen(tname) > 32)
{
valid = 0 ;
gotoxy(5,25) ; clreol() ;
cout <<“\7Enter correctly (Range: 1..32)” ;
getch() ;
}
} while (!valid) ;
if (strlen(tname) == 0)
strcpy(tname,bookname(tcode)) ;
do
{
valid = 1 ;
gotoxy(5,25) ; clreol() ;
cout <<“Enter the author’s name or <ENTER> for no change” ;
gotoxy(19,17) ; clreol() ;
gets(tauthor) ;
strupr(tauthor) ;
if (tauthor[0] == ‘0’)
return ;
if (strlen(tauthor) > 25)
{
valid = 0 ;
gotoxy(5,25) ; clreol() ;
cout <<“\7Enter correctly (Range: 1..25)” ;
getch() ;
}
} while (!valid) ;
if (strlen(tauthor) == 0)
strcpy(tauthor,authorname(tcode)) ;
do
{
valid = 1 ;
gotoxy(5,25) ; clreol() ;
cout <<“Enter price or <ENTER> for no change” ;
gotoxy(22,18) ; clreol() ;
gets(t1) ;
t2 = atof(t1) ;
tprice = t2 ;
if (t1[0] == ‘0’)
return ;
if (strlen(t1) == 0)
break ;
if (tprice < 1 || tprice > 9999)
{
valid = 0 ;
gotoxy(5,25) ; clreol() ;
cout <<“\7Enter correctly” ;
getch() ;
}
} while (!valid) ;
if (strlen(t1) == 0)
tprice = bookprice(tcode) ;
gotoxy(5,25) ; clreol() ;
do
{
gotoxy(5,20) ; clreol() ;
cout <<“Do you want to save changes (y/n) : ” ;
ch = getche() ;
ch = toupper(ch) ;
if (ch == ‘0’)
return ;
} while (ch != ‘Y’ && ch != ‘N’) ;
if (ch == ‘N’)
return ;
BOOK::modify(tcode,tname,tauthor,tprice) ;
gotoxy(5,23) ;
cout <<“\7Record Modified” ;
getch() ;
}

//**********************************************************
// THIS FUNCTION GIVES DATA TO MODIFY THE MEMBER RECORD
//**********************************************************

void WORKING :: modify_member(void)
{
MEMBER M ;
char m1code[10], mname[26], mphone[10], maddress[33], ch ;
int m2code=0, mcode=0 ;
int valid ;
do
{
valid = 1 ;
while (1)
{
clrscr() ;
gotoxy(72,1) ;
cout <<“<0>=Exit” ;
gotoxy(5,7) ;
cout <<“Enter Code no. of the Member to be Modify” ;
gotoxy(5,8) ;
cout <<”                        or              ” ;
gotoxy(5,9) ;
cout <<“Press <ENTER> for help  ” ;
gets(m1code) ;
m2code = atoi(m1code) ;
mcode = m2code ;
if (m1code[0] == ‘0’)
return ;
if (strlen(m1code) == 0)
M.list() ;
else
break ;
}
if (mcode == 0)
{
valid = 0 ;
gotoxy(5,25) ;
cout <<“\7Enter Correctly” ;
getch() ;
}
if (valid && !member_found(mcode))
{
valid = 0 ;
gotoxy(5,13) ;
cout <<“\7Record not found” ;
gotoxy(5,14) ;
cout <<“Press <ESC> to exit or any other key to continue…” ;
ch = getch() ;
if (ch == 27)
return ;
}
} while (!valid) ;
clrscr() ;
gotoxy(72,1) ;
cout <<“<0>=Exit” ;
MEMBER::display(mcode) ;
do
{
gotoxy(5,10) ; clreol() ;
cout <<“Do you want to modify this record (y/n) : ” ;
ch = getche() ;
ch = toupper(ch) ;
if (ch == ‘0’)
return ;
} while (ch != ‘Y’ && ch != ‘N’) ;
if (ch == ‘N’)
return ;
gotoxy(5,13) ;
cout <<“Name    : ” ;
gotoxy(5,14) ;
cout <<“Phone   : ” ;
gotoxy(5,15) ;
cout <<“Address : ” ;
do
{
valid = 1 ;
gotoxy(5,25) ; clreol() ;
cout <<“Enter the name of the member or <ENTER> for no change” ;
gotoxy(19,13) ; clreol() ;
gets(mname) ;
strupr(mname) ;
if (mname[0] == ‘0’)
return ;
if (strlen(mname) > 25)
{
valid = 0 ;
gotoxy(5,25) ; clreol() ;
cout <<“\7Enter correctly (Range: 1..25)” ;
getch() ;
}
} while (!valid) ;
if (strlen(mname) == 0)
strcpy(mname,membername(mcode)) ;
do
{
valid = 1 ;
gotoxy(5,25) ; clreol() ;
cout <<“Enter the Phone no. of Member or <ENTER> for no change” ;
gotoxy(19,14) ; clreol() ;
gets(mphone) ;
if (mphone[0] == ‘0’)
return ;
if ((strlen(mphone) < 7 && strlen(mphone) > 0) || (strlen(mphone) > 9))
{
valid = 0 ;
gotoxy(5,25) ; clreol() ;
cout <<“\7Enter correctly” ;
getch() ;
}
} while (!valid) ;
if (strlen(mphone) == 0)
strcpy(mphone,memberphone(mcode)) ;
do
{
valid = 1 ;
gotoxy(5,25) ; clreol() ;
cout <<“Enter the address of the member or <ENTER> for no change” ;
gotoxy(19,15) ; clreol() ;
gets(maddress) ;
strupr(maddress) ;
if (maddress[0] == ‘0’)
return ;
if (strlen(maddress) > 32)
{
valid = 0 ;
gotoxy(5,25) ; clreol() ;
cout <<“\7Enter correctly (Range: 1..32)” ;
getch() ;
}
} while (!valid) ;
if (strlen(maddress) == 0)
strcpy(maddress,memberaddress(mcode)) ;
gotoxy(5,25) ; clreol() ;
do
{
gotoxy(5,18) ; clreol() ;
cout <<“Do you want to save changes (y/n) : ” ;
ch = getche() ;
ch = toupper(ch) ;
if (ch == ‘0’)
return ;
} while (ch != ‘Y’ && ch != ‘N’) ;
if (ch == ‘N’)
return ;
MEMBER::modify(mcode,mname,mphone,maddress) ;
gotoxy(5,23) ;
cout <<“\7Record Modified” ;
getch() ;
}

//**********************************************************
// THIS FUNCTION GIVES BOOK CODE TO DELETE THE BOOK RECORD
//**********************************************************

void WORKING :: delete_book(void)
{
BOOK B ;
char t1code[5], tname[33], tauthor[26], ch ;
int t2code=0, tcode=0 ;
int valid ;
do
{
valid = 1 ;
while (1)
{
clrscr() ;
gotoxy(72,1) ;
cout <<“<0>=Exit” ;
gotoxy(5,5) ;
cout <<“Enter Code or Name of the Book to be Deleted” ;
gotoxy(5,6) ;
cout <<”                  or                       ” ;
gotoxy(5,7) ;
cout <<“Press <ENTER> for help  ” ;
gets(t1code) ;
if (t1code[0] == ‘0’)
return ;
if (strlen(t1code) == 0)
B.list() ;
else
break ;
}
t2code = atoi(t1code) ;
tcode = t2code ;
if ((tcode == 0 && !bookname_found(t1code)) || (tcode != 0 && !book_found(tcode)))
{
valid = 0 ;
gotoxy(5,10) ;
cout <<“\7Record not found” ;
gotoxy(5,11) ;
cout <<“Press <ESC> to exit or any other key to continue…” ;
ch = getch() ;
if (ch == 27)
return ;
}
} while (!valid) ;
if (tcode == 0)
tcode = bookcodeof(t1code) ;
clrscr() ;
gotoxy(72,1) ;
cout <<“<0>=Exit” ;
BOOK::display(tcode) ;
do
{
gotoxy(5,13) ; clreol() ;
cout <<“Do you want to delete this record (y/n) : ” ;
ch = getche() ;
ch = toupper(ch) ;
if (ch == ‘0’)
return ;
} while (ch != ‘Y’ && ch != ‘N’) ;
if (ch == ‘N’)
return ;
int tavail, tcopies ;
tavail = available(tcode) ;
tcopies = no_of_copies(tcode) ;
if (tavail != tcopies)
{
gotoxy(5,15) ;
cout <<“\7Record cannot be deleted. This book is issued.” ;
getch() ;
return ;
}
BOOK::delete_rec(tcode) ;
gotoxy(5,23) ;
cout <<“\7Record Deleted” ;
getch() ;
}

//**********************************************************
// THIS FUNCTION GIVES MEMBER CODE TO DELETE THE MEMBER
// RECORD
//**********************************************************

void WORKING :: delete_member(void)
{
MEMBER M ;
char m1code[5], mname[26], mphone[10], maddress[33], ch ;
int m2code=0, mcode=0 ;
int valid ;
do
{
valid = 1 ;
while (1)
{
clrscr() ;
gotoxy(72,1) ;
cout <<“<0>=Exit” ;
gotoxy(5,7) ;
cout <<“Enter Code no. of the Member to be Deleted” ;
gotoxy(5,8) ;
cout <<”                        or              ” ;
gotoxy(5,9) ;
cout <<“Press <ENTER> for help  ” ;
gets(m1code) ;
m2code = atoi(m1code) ;
mcode = m2code ;
if (m1code[0] == ‘0’)
return ;
if (strlen(m1code) == 0)
M.list() ;
else
break ;
}
if (mcode == 0)
{
valid = 0 ;
gotoxy(5,25) ;
cout <<“\7Enter Correctly” ;
getch() ;
}
if (valid && !member_found(mcode))
{
valid = 0 ;
gotoxy(5,13) ;
cout <<“\7Record not found” ;
gotoxy(5,14) ;
cout <<“Press <ESC> to exit or any other key to continue…” ;
ch = getch() ;
if (ch == 27)
return ;
}
} while (!valid) ;
clrscr() ;
gotoxy(72,1) ;
cout <<“<0>=Exit” ;
MEMBER::display(mcode) ;
do
{
gotoxy(5,10) ; clreol() ;
cout <<“Do you want to Delete this record (y/n) : ” ;
ch = getche() ;
ch = toupper(ch) ;
if (ch == ‘0’)
return ;
} while (ch != ‘Y’ && ch != ‘N’) ;
if (ch == ‘N’)
return ;
if (issued(mcode))
{
gotoxy(5,15) ;
cout <<“\7Record cannot be delete. Member has a book” ;
getch() ;
return ;
}
MEMBER::delete_rec(mcode) ;
gotoxy(5,23) ;
cout <<“\7Record Modified” ;
getch() ;
}

//**********************************************************
// MAIN FUNCTION CALLING INTRODUCTION AND MAIN MENU
//**********************************************************

void main(void)
{
MENU menu ;
menu.introduction() ;
menu.main_menu() ;
}

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