The document is a presentation on file handling in C++. It was presented by Waqar Ali to Sir Fasee Ullah on May 21, 2014 for a BSSE class. The presentation covers reading from and writing to files in C++ using ifstream and ofstream classes and functions, and includes code examples for opening, writing, reading, and closing files.

1. Presentation:
Topic: File Handling
Subject: Intro to Programming
Presented to: Sir Fasee Ullah
Presented by: Waqar Ali
Submission date: 21- 05 - 2014
Class: BSSE ( A )
Department: Software Engineering

2. C++

3.  File Handling
 Reading File
 Writing on File

4.  We need to know:
• how to "connect" file to program
• how to tell the program to read
data
• how to tell the program to write
data

5. (1) Header File : #include<fstream>
(2) Declaration
(3) Open the file
(4) Process the File
(5) Close the File

6.  Classes:
 ifstream (input only)
 ofstream (output only)
 Uses:
For Reading a file We use a function
“ ifstream ”
While for Writing on file we use a function
called “ ofstream ”

7. READ FROM FILE WRITING ON FILE
#include<iostream>
#include<fstream>
using namespace std:
void main()
{
ofstream abc;
abc.open(“file_name”);
Cout<<“ur_msg”;
abc>>name;
abc.close();
getch();
}
#include<iostream>
#include<fstream>
using namespace std:
void main()
{
datatype Name;
ifstream file_name;
file_name.open(“ ”)
file_name<<“ ”<<endl;
file_name.close( );
getch( );
}

8. Writing on file
#include<iostream>
#include<conio.h>
#include<fstream> //file stream
using namespace std;
int main()
{
ofstream cr ; //class file name
cr.open("info.txt"); //Create a file ( open )
cr<<"File: "; //writing on files
cr<<"nName: ";
cr<<"nReg: ";
cr<<"nDepartment: ";
cr.close(); // closing file
getch();
}

10. Reading from File
#include<iostream>
#include<conio.h>
#include<fstream>
using namespace std;
int main()
{
string line;
ifstream file;
file.open("info.txt");
getline(file,line);
cout<<line<<endl;
getline(file,line);
cout<<line<<endl;
getline(file,line);
cout<<line<<endl;
getline(file,line);
cout<<line<<endl;
file.close();
getch();
}

12. #include<iostream>
#include<conio.h>
#include<fstream>
using namespace std;
int main()
{
ofstream cr;
cr.open("info.txt");
cr<<"File: "<<endl;
cr<<"Name: "<<endl;
cr<<"Reg: "<<endl;
cr<<"Department: "<<endl;
cr.close();
 string line;
 ifstream rc;
 rc.open("info.txt");

 getline(rc,line);
 cout<<line;
 cout<<"Student info"<<endl;
 getline(rc,line);

 cout<<line;
 cout<<"Waqar Ali"<<endl;
 getline(rc,line);

 cout<<line;
 cout<<"5509"<<endl;
 getline(rc,line);

 cout<<line;
 cout<<"Software Engineering"<<endl;
 getline(rc,line);
 rc.close();
 getch();
 }