Defined in header
std::FILE* fopen( const char* filename, const char* mode );
Opens a file indicated by
filename and returns a file stream associated with that file.
mode is used to determine the file access mode.
|filename||-||file name to associate the file stream to|
|mode||-|| null-terminated character string determining file access mode
 Return value
If successful, returns a pointer to the object that controls the opened file stream, with both eof and error bits cleared. The stream is fully buffered unless filename refers to an interactive device.
The format of
filename is implementation-defined, and does not necessarily refer to a file (e.g. it may be the console or another device accessible though filesystem API). On platforms that support them,
filename may include absolute or relative filesystem path.
 See also
| closes a file |
| synchronizes an output stream with the actual file |
| open an existing stream with a different name |
C documentation for fopen