This document is Shubham Yadav's investigatory project on a telephone directory for his class XII computer science course. It includes certificates of authentication from his principal and teacher confirming the project is his own work. The project uses C++ to create a program for a telephone directory that allows users to perform operations like viewing, searching, adding, modifying and deleting contact information from a data file. It provides the header files, classes, functions and sample outputs used to build the telephone directory program.

1. Computer science
Investigatory project
Telephone directory
Submittedby:-ShubhamYadav
Submittedto:-Mr.PawanSihag
(PGTComputerScience)

2. Kendriya Vidayalaya No 1
Air Force Station Bhuj
This is to certify to be the bonafide work of
the Computer Laboratory by Shubham
Yadav of class XII-A has completed the
annual investigatory project in the
academic year 2017-2018 as per the
CBSE syllabus for computer science in
class XII in KENDRIYA VIDYALAYA NO.1
AFS BHUJ.
Sign of:
…………………………
A.P Rai
(Principal)

3. K.V. No.1 AFS BHUJ
CERTIFICATEOF AUTHENTICITY
This is to certify that Shubham Yadav, student of
class XII-A has successfully completed the
research project on the topic “Telephone
Directory” under the guidance of Mr. Pawan Sihag
(PGT Computer Science).
This project is absolutely genuine and does not
indulge in plagiarism of any kind. The references
taken in making this project have been declared in
the end of this project report.
Sign of: Sign of:
……………………….. ……………………….
Examiner (Mr. Pawan Sihag)

4. Kendriya Vidyalaya
No.1
Air Force Station, Bhuj
From the depth of my heart I express my
deep sincere gratitude to the almighty for the
blessing that had bestowed upon me to do
this work.
Firstly, I would like to thanks to our Principal
MR. A.P. RAI who gave us the opportunity to
present this project. Secondly our subject
teacher ‘MR. PAWAN SIHAG ‘who guided me
to do this project and under his supervision I
became capable of doing this project.
Whenever I found myself stuck he helped me
in solving my difficulties and cleared my
doubts regarding the topic.

5. Contents

6. HEADER FILES USED
1. iostream.h – for cin and cout
2. conio.h – for getch()
3. fstream.h – for file handling
4. iomanip.h – for setw()
5. stdio.h – for standard i/o operation
6. stdlib.h – for using exit function

7. files generated
 telephone.dat – for storing data
 telephone1.dat – for storing copied
data form telephone.dat in delete
function
e r diagram

8. source code
// program: Telephone Directory
// Made By:- Shubham Yadav
#include<fstream.h>

9. #include<iostream.h>
#include<conio.h>
#include<ctype.h>
#include<process.h>
#include<iomanip.h>
#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include<math.h>
void welcome_screen()
{ clrscr();
gotoxy(15,11);
cout<<"(********************WELCOME********
************)";
gotoxy(15,14);
cout<<"( TELEPHONE MANAGEMENT SOFTWARE )";
getch();
{ gotoxy(25,20);
cout<<" Computer Science Project ";
}
gotoxy(38,25);

10. cout<<" M A D E B Y: ";
gotoxy(50,27);
cout<<" SHUBHAM YADAV ";
gotoxy(50,30);
cout<<" XII-A CS";
gotoxy(40,40);
cout<<"***Press any key to continue***";
cout<<"aaaaa";
getch();
return;
}
class directory
{ public:
int record;
long pn1;
char pn2[10];
int age;
char address1[50];
char address2[50];
char occupation[20];
char name[20];

11. char emailadd[40];
char internetadd[25];
void modification();
void addition();
void deleate();
void menu();
void search();
void view1();
void init();
void display();
void view();
char check(char *);
int test();
}obj;
void directory::addition() //ADDING INFORMATION
{ fstream fout;
fout.open("telephone.dat",ios::out|ios::app);
if(!fout)
{ cout<<"not able to open the file";
exit(0);
}

12. char ch='y';
while(ch=='y'||ch=='Y')
{ init();
fout.write((char*)&obj,sizeof(obj));
cout<<"one record added sucessfully";
cout<<"n Do you want enter more records ";
cin>>ch;
}
fout.close();
}
int directory::test() //FIND NO. OF RECORDS
{ fstream fin;
fin.open("telephone.dat",ios::in);
fin.seekg(0,ios::end);
int n;
n=fin.tellg()/sizeof(obj);
cout<<" n NUMBER OF RECORDS = "<<n;
return n;
}

13. void directory::search() //SEARCHING FOR A PARTICULAR
NUMBER
{ ifstream fin;
fin.open("telephone.dat",ios::in);
if (!fin)
{ cout<<"n FILE NOT FOUND ";
exit(0);
}
clrscr();
gotoxy(30,1);
cout<<" [SEARCHING] ";
cout<<" n ENTER PHONE NUMBERED TO BE
SEARCHED : ";
long pn;
cin>>pn;
int n;
n=test();
for (int i=0;i<n;i++)
{ fin.read((char*)&obj,sizeof(obj));
if (pn==pn1)
{ view1();

14. return;
}
}
if(fin.eof())
{ cout<<" n RECORD NOT FOUND ";
}
}
void directory::init() //ENTERING THE DETAILS
{ char c;
clrscr();
char ch;
gotoxy(30,1);
cout<<" [ADDITION] ";
cout<<"n ENTER HOUSE PHONE NUMBER (max 7
digits) :";
cin>>pn1;
cout<<"n ENTER MOBILE PHONE NUMBER (max 10
digits) :";
cin>>pn2;
cin.get(ch);
cout<<" n ENTER NAME : ";

15. cin.getline(name,20,'n');
cout<<" n ENTER HOUSE ADDRESS : ";
cin.getline(address1,50,'n');
cout<<"n ENTER EMAIL ADDRESS : ";
cin.getline(emailadd,40,'n');
cout<<"nnnnn Want to exit(Y/N) :";
cin>>c;
if (c=='Y'||c=='y')
exit(0);
}
void directory::view1() //TO DISPLAY ALL THE RECORDS
{ cout<<"n";
cout<<" PHONE NUMBER1 :"<<obj.pn1<<"n";
cout<<" PHONE NUMBER2 :"<<obj.pn2<<"n";
cout<<" NAME : "<<obj.name<<"n";
cout<<" HOUSE ADDRESS : "<<obj.address1<<"n";
cout<<" EMAIL ADDRESS : "<<obj.emailadd<<"n";
getch();
}

16. void directory::modification() //TO MODIFY ANY DATA IN
THE RECORD IF NECESSARY
{ clrscr();
gotoxy(30,1);
cout<<" [MODIFICATION] ";
long pn;
int n,i;
ifstream fin;
ofstream fout;
fin.open("telephone.dat");
if (fin.fail())
{ cout<<"n FILE NOT FOUND ! ";
fout.close();
exit(0);
}
fout.open("new");
n=test();
if (n==0)
{ cout<<"n FILE IS EMPTY ! ";
getch();
return;

17. }
while(fin.good())
{ fin.read((char*)&obj,sizeof(obj));
fout.write((char*)&obj,sizeof(obj));
}
fin.close();
fout.close();
fout.open("telephone.dat",ios::trunc);
fin.open("new");
if (fin.fail())
{ cout<<"n FILE NOT FOUND ! ";
exit(0);
}
char ch;
cout<<"n ENTER PHONE NUMBER : ";
cin>>pn;
ch=cin.get();
for(i=0;i<n;i++)
{ fin.read((char*)&obj,sizeof(obj));
char d;
if (pn==pn1)

18. { view1();
d=check("MOBILE PHONE NUMBER");
if((d=='y')||(d=='Y'))
{cout<<"n ENTER NEW PHONE NUMBER:";
cin>>pn1;
ch=cin.get();
}
if(check("MOBILE PHONE NUMBER")=='Y')
{cout<<"n ENTER NEW PHONE NUMBER:";
cin>>pn2;
ch=cin.get();
cin.get(ch);
}
if(check("NAME")=='y')
{ cout<<"n ENTER NEW NAME :";
cin.getline(name,20,'n');
}
if(check("HOME ADDRESS")=='y')
{ cout<<"n ENTER NEW ADDRESS :";
cin.getline(address1,50,'n');
}

19. if(check("EMAIL ADDRESS")=='y')
{cout<<"n ENTER NEW EMAIL ADDRESS :";
cin.getline(emailadd,25,'n');
}
}
fout.write((char*)&obj,sizeof(obj));
}
}
char directory::check(char *s)
{ cout<<"n MODIFY t"<<s<<"t"<<"Y/N";
char ch;
ch=getch();
if((ch=='y')||(ch=='Y'))
return 'y';
else
return 'n';
}
void directory::deleate()
{ clrscr();
window(1,1,80,25);

20. gotoxy(30,1);
cout<<" [DELETION] ";
long pn;
int n,i;
ifstream fin;
ofstream fout;
fin.open("telephone.dat",ios::in);
if (fin.fail())
{ cout<<"n FILE NOT FOUND ! ";
getch();
return;
}
fout.open("new");
n=test();
if (n==0)
{ cout<<"n FILE IS EMPTY ";
getch();
return;
}
for(i=0;i<n;i++)
{ fin.read((char*)&obj,sizeof(obj));

21. fout.write((char*)&obj,sizeof(obj));
}
fin.close();
fout.close();
fout.open("telephone1.dat",ios::trunc);
fin.open("new");
if(fin.fail())
{ cout<<"n FILE NOT FOUND !";
getch();
return;
}
cout<<"n ENTER PHONE NUMBER :";
cin>>pn;
for(i=0;i<n;i++)
{ fin.read((char*)&obj,sizeof(obj));
if(pn!=pn1)
{ fout.write((char*)&obj,sizeof(obj));
}
}
fout.close();
fin.close();

22. }
void directory::view()
{ ifstream fin;
int n,j;
fin.open("telephone.dat",ios::in);
if(fin.fail()||fin.bad())
{ cout<<"n FILE NOT FOUND !";
getch();
return;
}
clrscr();
int i=0;
n=test();
for(j=0;j<n;j++)
{ cout<<"n RECORD"<<(i+1)<<"n";
fin.read((char*)&obj,sizeof(obj));
cout<<"n PHONE NUMBER1 :"<<obj.pn1<<"n";
cout<<"n PHONE NUMBER2 :"<<obj.pn2<<"n";
cout<<"n NAME :"<<obj.name<<"n";
cout<<"n HOUSE ADDRESS
:"<<obj.address1<<"n";

23. // cout<<"n OCCUPATION ADDRESS
:"<<obj.occupation<<"n";
// cout<<"n OFFICE ADDRESS :
"<<obj.address2<<"n";
// cout<<"n INTERNET ADDRESS :
"<<obj.internetadd<<"n";
cout<<"n EMAIL ADDRESS
:"<<obj.emailadd<<"n";
i+=1;
}
fin.close();
getch();
}
void directory::menu()
{ char ch;
clrscr();
gotoxy(20,3);
cout<<"TELEPHONE DIRECTORY: What You Want to
do?";
//textcolor(RED);
gotoxy(30,8);
cout<<" A: ADDITION";

24. gotoxy(30,11);
cout<<" D: DELETION nr";
gotoxy(30,14);
cout<<" M: MODIFICATION nr";
gotoxy(30,17);
cout<<" V: VIEW nr";
gotoxy(30,20);
cout<<" S: SEARCH nr";
gotoxy(30,23);
cout<<" E: EXIT nr";
ch=getch();
switch(ch)
{ case'a':
case'A': addition();
break;
case'd':
case'D': deleate();
break;
case'm':
case'M': modification();
break;

25. case'v':
case'V': view();
break;
case's':
case'S': search();
break;
case'e':
case'E': clrscr();
exit(0);
}
}
int main()
{ welcome_screen();
for(;;)
obj.menu();
return 0; }
output screen
1 welcome screen

26. 2. operational screen
3. addition screen

27. 4. screen after adding one record
5. view operation screen

28. 6 search operation screen
7 screen after search operation

29. 8 modification operation screen
9 screen after input in modification operation

30. 10 screen after modification in modification operation
11. input in delete operation screen

31. 12. view operation screen after deletion

32. Websites:-
www.wikipedia.com
www.icbse.com
www.csworld.com
Books:-
Computer Science
By- Sumita Arora
Subjectteacher:-
Mr. Pawan Sihag