Files are the foremost visible and therefore the most precious feature of any computing system to its users. Files provide a mechanism for the long term storage of data.
They remain to exist even if the computer is switched off. Files are stored within the concentric circular tracks of a floppy or a tough disk.Before a file are often used for reading or writing , it must be opened.
This is done by a call to the fopen() function. The function fopen() requires two arguments :
1. File name
2. Option (r, w, a, etc)
They remain to exist even if the computer is switched off. Files are stored within the concentric circular tracks of a floppy or a tough disk.Before a file are often used for reading or writing , it must be opened.
This is done by a call to the fopen() function. The function fopen() requires two arguments :
1. File name
2. Option (r, w, a, etc)
Option indicates what we want to do with the file :
(a) read it
(b) write to it
(c) append to it (writing at the end).
Below are the file opening options for text files:
- r This option opens existing file for reading the content in it.
- w This option opens(creates file if not present) and it deletes previous content.
- a This option opens(and makes file if needed) and this option does not delete previous content and writes at the end of file.
- r+ This option opens existing file for reading and writing. It behaves like 'r' (read only) with the option of writing.
- w+ This option creates and open file for reading and writing, it deletes previous content. It behaves like 'w'(write) with the option of reading.
- a+ This option opens (creates if file not present) file for reading and adding content in file. It behaves like 'a' with the option for reading.
This is dummy text. It is not meant to be read. Accordingly, it is difficult to figure out when to end it. But then, this is dummy text. It is not meant to be read. Period.