Files - Opening

#include <stdio.h> FILE* fopen ( char* name, char* mode )

Open a file and return a FILE pointer using the given mode. If there's a problem opening the file, the function will return NULL.

The mode is some combination of the three characters "w", "r", "a", and (on some systems) "b".

"w"	open for write
"r"	open for read
"a"	open for appending
"wa"	open for write, appending to existing data.
"rw"	open for read and write
"b"	Open in binary mode. Usually the default and only required on some systems.

There are more combinations of the letters w, r, a, and b but these are the most common.