Sunday, 23 March 2014

Library Management System ( CPP coding ) :


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
Login Menu

Login welcome screen
Administrator Menu

Availability of books
List of Available books

username and password
Membership details

books list
Available books

incorrect password
Login failure






















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