1. By Anand George SourceLens.org Copyright. All rights reserved. Content Owner - Meera R (meera at sourcelens.org)

2. What is a file?  A piece of memory in secondary storage or disk.  Will retain after reboot of computer or restart of the program.  Memory or RAM wont retain after program restart or reboot of computer.  Secondary memory is slower than RAM. SourceLens.org Copyright. All rights reserved. Content Owner - Meera R (meera at sourcelens.org)

3. Example  A jpg file which is a picture.  An html page which is a file in a web server.  A download program is a nothing but a group of files, say skype or gtalk or anything like that. SourceLens.org Copyright. All rights reserved. Content Owner - Meera R (meera at sourcelens.org)

4. How to create and access file in C program?  As for most of the other thing some library function.  fopen – to open or create a file  fread – read from the file to program memory ( variable )  fwrite – write to file from the contents of memory SourceLens.org Copyright. All rights reserved. Content Owner - Meera R (meera at sourcelens.org)

5. Steps for reading 1. Make a file using notepad. 2. Open that file 3. Read from the file 4. Print the contents of the file. 5. Close the file SourceLens.org Copyright. All rights reserved. Content Owner - Meera R (meera at sourcelens.org)

6. Steps for writing  Open an empty file  Initialize a character array.  Print the contents of the array ( which is memory ) to the file.  Close the file  Check the file using notepad if the program worked. SourceLens.org Copyright. All rights reserved. Content Owner - Meera R (meera at sourcelens.org)

7. Demo  Reading and writing to a file. SourceLens.org Copyright. All rights reserved. Content Owner - Meera R (meera at sourcelens.org)

8. Student details program using files.  A program to do the following  Accept the number of students.  Accept the details of above mentioned students.  Details name, id address for each student.  Save the entered details to a file.  Another program to Read the file and display content. SourceLens.org Copyright. All rights reserved. Content Owner - Meera R (meera at sourcelens.org)

9. Demo  Student details program using files. SourceLens.org Copyright. All rights reserved. Content Owner - Meera R (meera at sourcelens.org)

10. Thank you SourceLens.org Copyright. All rights reserved. Content Owner - Meera R (meera at sourcelens.org)