CS201 Assignment No. 3 Solution and Discussion


  • Cyberian's

    Assignment No. 3
    Semester: Spring 2019
    CS201 – Introduction to Programming
    Total Marks: 20

    Due Date: 11/07/2019

    Instructions
    Please read the following instructions carefully before submitting assignment:
    It should be clear that your assignment will not get any credit if:

    o Assignment is submitted after due date.
    o Submitted assignment does not open or file is corrupt.
    o Assignment is copied (From internet/students).

    Recommended software for assignment development:

    • Dev C++

    Objectives:
    To enable students to understand and practice the concepts of:
    • Variables and operators
    • Loops / Repetition Structures
    • Switch Statement
    • Functions
    • String Manipulation Functions
    • Structures

    Assignment Submission Instructions
    You have to submit only .cpp file on the Assignments interface of CS201 at VULMS. Assignment submitted in any other format will not be accepted and will be graded with zero marks.

    Assignment

    Problem:
    Structures are used to overcome the shortcomings of arrays. Basically arrays are used to store more than one data values of a single datatype.
    Ex : int a[100] stores integer datatype values
    Whereas if you want to make students result database including student_id (int), student_name (char), marks (float) of more than one student, you cannot use array. Here comes the use of structures. Structures are user defined datatypes which allows you to store data of different types.
    Example:

    struct Student
    {
     int student_id;
     char student_name[50];
     float marks;
    }s[10];
    

    Assignment Statement:
    Write a menu based system in C++ for “Library Book Record System” that will take input from user for the following menu. You will create a structure and perform the following operations on the structure.
    Press 1 To Enter a Book Record.
    Press 2 To Display all Records of Books Available in Library.
    Press 3 To Search Books by Author Name.
    Press 4 To Count Total Books in Library.
    Press 5 To Exit from the System.

    *System will take following inputs from user to enter a book record:
    • Book ID
    • Book Title
    • Author of Book
    • Cost of Book

    Solution Instructions:
    Use switch statement for the menu based system.
    You can use user defined functions for each of the task mentioned above to manage your code.

    ad96bfa7-786e-45cb-b9a1-a9d8c7dad015-image.png

    *Note:
    Restrict your system that it do not allow to add more than 5 books and on try of adding books more than limit show message i.e. “No more space in System for another book”.
    Use strcmp function to search books by author name in Book_Author(); function.

    Sample output:
    6b13e5df-e827-472b-bd12-4a75f45613ee-image.png
    90f801c6-e8c0-4b84-b621-424acdbe0fee-image.png
    a1187203-217d-4cdf-9c5e-b764ad3a51fb-image.png
    2a44e113-5d8a-485b-8180-f3fef704e7ab-image.png
    5c754f23-38d7-4a51-83fe-a9995aa53f6e-image.png
    35b74683-0c9f-4c5f-b2f6-6dad22cc30ad-image.png

    Lectures Covered: This assignment covers lectures 16 -25.
    Deadline: The deadline to submit your assignment solution is Thursday, July 11, 2019. Your assignment must be submitted within the due date through VULMS. No assignment will be accepted through email after the due date.

    b4be31d5-0328-48e4-8b2d-145480b4ac99-image.png
    Spring 2019_CS201_3.doc


  • Cyberian's

    Library Management System Project C++

    library-management-system-project.rar


  • Cyberian's

    CS201 Assignment 3 2019 Solution Idea

    //***************************************************************
    //                   HEADER FILE USED IN PROJECT
    //****************************************************************
    
    #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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