Library Management System has been implemented as a C++ program. Complete program code is given below. Complete project is available on user request. User comments are welcome to notify any Bugs or to improve the further posts. :)
Concepts used:
Multilevel inheritance is used in this program. The files concepts were also used to store and retrieve the required data's for the login details, membership details and book details.
Modules :
1. Login maintenance
2. Library maintenance
3. Book issue maintenance
4. Book return maintenance
LOGIN MAINTENANCE
Separate login for administrator, member and guest should be provided.
Should accept user name and password from the user.
Should compare the user name and password (case sensitive).
If the user name and password matches then the menu for the respective login
should be displayed.
If the user name or password is incorrect it should display an error message.
If the user name or password is wrong return to previous menu.
LIBRARY MAINTENANCE
This module has the following functions
Add member
Every member should be allocated with a unique ID.
The member ID should be generated by the system.
Each member should be filled with their details such as name address etc.
After adding a new member, it should return to the main menu.
View/Delete a member
If the member ID is entered the details of the member should be
displayed.
If the member should be removed from the list, use delete option to
remove the member from the list.
Add books
Should add new books to the library.
Read book details such as book name, author etc.
Store the details of the book.
View book details
Read the book title to search the book.
If the book is found display the details of the book.
View all books
If this module is executed list all the available books in the library.
BOOK ISSUE MAINTENANCE
Only members can take the books from library.
Search the book and click to view the book details.
If the member wants that book and if that book is available lend that book.
Store the member details and book details along with the issue date in issue.txt
file.
Update the book detail as not available.
BOOK RETURN MAINTENANCE
User should be logged in as a member.
To return a book enter the book number.
Display the issue date.
Calculate the number of days from issue to return.
If the number of days is more than 15 charge RS.1 for each day.
Calculate the total fine amount.
Update the book status as available.
Source Code :
#include<iostream.h>
#include<iomanip.h>
#include<string.h>
#include<conio.h>
#include<fstream.h>
int line=0,entry=0,mem=1,log=0,no,id;
class library
{
public:
void header();
void footer();
}obj;
class books: public library
{
protected:
char name[20],author[20];
public:
int code,stat;
void update(ofstream &fout)
{
fout<<code<<' '<<name<<' '<<author<<' '<<stat<<endl;
}
friend void book_display();
}bks[10];
class users : public books
{
protected:
char name[20];
int rollno,member_id;
public:
int take,tcode;
void welcome()
{
cout<<setw(40)<<"WELCOME "<<name;
}
void read(ifstream &fin)
{
fin>>member_id>>rollno>>name>>take>>tcode>>mem;
}
void update(ofstream &fout)
{
fout<<member_id<<' '<<rollno<<' '<<name<<' '<<take<<' '<<tcode<<' '<<mem<<endl;
}
void login()
{
if(no==rollno&&id==member_id)
entry=1;
}
void add()
{
obj.header();
cout<<endl<<setw(48)<<"ADD MEMBER\n\n";
cout<<setw(50)<<"Enter Member ID :";
cin>>member_id;
cout<<setw(50)<<"Enter Roll number:";
cin>>rollno;
cout<<setw(50)<<"Enter Name :";
cin>>name;
obj.footer();
take=0;
tcode=0;
mem++;
}
void display()
{ cout<<member_id<<'\t'<<rollno<<'\t'<<name<<'\t';//<<"\t\t"<<take<<'\t'<<tcode<<endl;
if(tcode==0)
{ cout.setf(ios::right);
cout.width(15);
cout<<"No"<<endl;
}
else
{
cout.setf(ios::right);
cout.width(15);
cout<<tcode<<endl;
}
}
};
class admins: public users
{
protected:
char user[20],passwd[30];
public:
admins()
{
strcpy(user,"gokul");
strcpy(passwd,"gokul");
}
void login();
};
void library::header()
{
int i;
clrscr();
for(i=0;i<5;i++)cout<<endl;
for(i=0;i<80;i++)cout<<"*";
cout<<"*"<<setw(48)<<"Digital Library"<<setw(31)<<"*";
cout<<"*"<<setw(44)<<"KCE, CBE"<<setw(35)<<"*";
for(i=0;i<80;i++)cout<<"*";
line=0;
}
void library::footer()
{
int i;
for(i=line;i<10;i++)cout<<endl;
for(i=0;i<80;i++)cout<<"*";
}
void admins::login()
{
int i=0;
char c,name[20],passwrd[20];
cout<<"\n\n"<<setw(51)<<"ADMINISTRATOR LOGIN";
cout<<"\n\n"<<setw(40)<<"username:";
cin>>name;
cout<<setw(40)<<"Password:";
while((c=getch())!=13)
{
passwrd[i++]=c;
cout<<'*';
}
passwrd[i]='\0';
if((strcmp(user,name)==0)&&(strcmp(passwd,passwrd)==0))
{
entry=1;
}
else
{
entry=0;
cout<<endl<<setw(55)<<"Incorrect username/password";
line=line+6;
obj.footer();
getch();
}
}
void book_display();
int main()
{
int i,login;
users student[10];
ifstream fin("members.txt");
for(i=0;i<mem;i++)
student[i].read(fin);
fin.close();
obj.header();
cout<<endl<<endl<<setw(45)<<"LOGIN AS\n"<<endl<<setw(50)<<"1. Administrator\n"<<setw(44)<<"2. Student\n"<<setw(40)<<"3. Exit";
line=line+6;
obj.footer();
cout<<endl<<setw(47)<<"Enter choice:";
cin>>login;
switch(login)
{
case 1:
{
admins admin;
obj.header();
admin.login();
if(entry)
{
int choice;
do
{
obj.header();
cout<<"Welcome Gokul,"<<setw(66)<<"0-Logout";
cout<<"\n"<<setw(50)<<"Adminstrator Menu";
cout<<"\n\n"<<setw(49)<<"1.View members";
cout<<"\n"<<setw(48)<<"2.Add members";
cout<<"\n"<<setw(51)<<"3.Delete members";
cout<<"\n"<<setw(47)<<"4.View books";
line=line+7;
obj.footer();
cout<<endl<<setw(50)<<"Enter your choice:";
cin>>choice;
switch(choice)
{
case 0:
break;
case 1:
{
int i;
obj.header();
cout<<setw(47)<<"Members List"<<endl;
cout<<"\t\tID\tRoll\tName"<<setw(30)<<"Book taken"<<endl;
for(i=0;i<mem;i++)
{
cout<<"\t\t";
student[i].display();
}
line=line+mem+2;
obj.footer();
getch();
break;
}
case 2:
{
student[mem].add();
break;
}
case 3:
{
int i,del;
obj.header();
cout<<setw(47)<<"Members List"<<endl;
cout<<"\tS.No\tID\tRoll\tName"<<setw(30);
cout<<"Book taken"<<endl;
for(i=0;i<mem;i++)
{
cout<<"\t"<<i+1<<"\t";
student[i].display();
}
line=line+mem+2;
obj.footer();
cout<<setw(47)<<"Enter your choice:";
cin>>del;
ofstream out("members.txt");
int j=mem;
mem--;
for(i=0;i<j;i++)
{
if(i+1!=del)
student[i].update(out);
}
out.close();
ifstream fin("members.txt");
for(i=0;i<mem;i++)
student[i].read(fin);
fin.close();
break;
}
case 4:
{
obj.header();
book_display();
obj.footer();
getch();
break;
}
default:
{
cout<<endl<<setw(55)<<"Enter a valid choice...";
getch();
}
}
ofstream out("members.txt");
for(i=0;i<mem;i++)
student[i].update(out);
out.close();
}while(choice!=0);
entry=0;
}
main();
break;
}
case 2:
{
obj.header();
int i;
cout<<"\n\n"<<setw(48)<<"STUDENT LOGIN";
cout<<"\n\n"<<setw(43)<<"Member ID:";
cin>>id;
cout<<setw(43)<<"Roll no:";
cin>>no;
for(i=0;i<mem;i++)
{
log=i;
student[log].login();
if(entry==1)
break;
else if(entry==0&&i+1==mem)
{
entry=0;
cout<<endl<<setw(52)<<"Incorrect ID/Roll no";
line=line+7;
obj.footer();
getch();
}
}
if(entry)
{
int choice;
do
{
obj.header();
cout<<"Take/Return"<<setw(69)<<"0-Logout";
student[log].welcome();
book_display();
line=line+1;
obj.footer();
cout<<"Taken books/book code:"<<student[log].tcode;
cout<<setw(25)<<"Enter your choice:";
cin>>choice;
if(bks[choice-1].stat==1&&student[log].take==0)
{
bks[choice-1].stat=0;
student[log].take=1;
student[log].tcode=bks[choice-1].code;
obj.header();
cout<<"\n\n"<<setw(55)<<"Book taken successfully...\n";
cout<<endl<<setw(60)<<"Return the book before 15 days.";
cout<<endl<<setw(60)<<"A fine of Rs.1 will be collected\n";
cout<<setw(60)<<"for each day after the due date.";
line=line+6;
obj.footer();
getch();
}
else if(bks[choice-1].stat==0&&student[log].take==1&&student[log].tcode==bks[choice-1].code)
{
int days,fine=0;
bks[choice-1].stat=1;
student[log].take=0;
student[log].tcode=0;
obj.header();
cout<<"\n\n"<<setw(48)<<"Book Return\n\n";
cout<<setw(50)<<"Enter number of days:";
cin>>days;
if(days>15)
{
fine=days-15;
cout<<"\n\n"<<setw(47)<<"Fine amount:"<<fine;
}
else
cout<<"\n\n"<<setw(55)<<"Book returned successfully";
line=line+7;
obj.footer();
getch();
}
else
{
if(choice)
{
obj.header();
cout<<"\n\n"<<setw(53)<<"unable to take/return";
cout<<endl<<setw(53)<<"Possible reasons:\n";
cout<<endl<<setw(56)<<"- Return the taken book";
cout<<endl<<setw(60)<<"- Book may not be available";
line=line+6;
obj.footer();
getch();
}
}
ofstream fout("books.txt");
for(i=0;i<10;i++)
{
bks[i].update(fout);
}
fout.close();
ofstream out("members.txt");
for(i=0;i<mem;i++)
student[i].update(out);
out.close();
}while(choice!=0);
}
entry=0;
main();
break;
}
case 3:
{
return 0;
}
default:
{
cout<<setw(52)<<"Enter a valid option!";
getch();
main();
break;
}
}
return 0;
}
void book_display()
{
int i;
ifstream fin("books.txt");
for(i=0;i<10;i++)
fin>>bks[i].code>>bks[i].name>>bks[i].author>>bks[i].stat;
cout<<endl<<"S.No\tCode\tName\t\t\tAuthor"<<setw(34)<<"Available";
for(i=0;i<10;i++)
{
cout<<" "<<i+1<<'\t'<<bks[i].code<<"\t"<<bks[i].name<<"\t\t"<<bks[i].author;
if(bks[i].stat==1)
{
cout.setf(ios::right);
cout.width(10);
cout<<"\t\tYes\n";
}
else
{
cout.setf(ios::right);
cout.width(10);
cout<<"\t\tNo\n";
}
}
line=10;
}
Output:
 |
| Login Menu |
 |
| Administrator Menu |
 |
| List of Available books |
 |
| Membership details |
 |
| Available books |
 |
| Login failure |
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