C Tutorial/stdio.h/fopen
fopen
Item Value Header
- include <stdio.h>
Declaration FILE *fopen(const char *fname, const char *mode); Function opens a file by *fname Return returns a FILE pointer on success or NULL pointer on failure
The legal values for mode.
Mode Meaning "r" Open text file for reading "w" Create a text file for writing "a" Append to text file "rb" Open binary file for reading "wb" Create binary file for writing "ab" Append to a binary file "r+" Open text file for read/write "w+" Create text file for read/write "a+" Open text file for read/write "rb+" or "r+b" Open binary file for read/write "wb+" or "w+b" Create binary file for read/write "ab+" or "a+b" Open binary file for read/write
