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Fopen

In computer programming, the fopen, with related functions fdopen and freopen, is one of basic functions in C programming language. Because it is so popular that many script languages derivered from C tend to provide the same function with the same or similar functionality. It is considered more high-level than the open[?] system call of UNIX operating systems.

They are defined as.

FILE * fopen(const char *path, const char *mode);
FILE * fdopen(int fildes, const char *mode);
FILE * freopen(const char *path, const char *mode, FILE * restrict stream);

In some libraries, mode can include a letter b, which indicates the given file is a binary file[?]. Without that, a sequence of carrying return and line feed is automatically regarded as line feed. See new line for new line issue.



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