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#include <stdio.h> FILE *freopen(const char *filename, const char *mode, FILE *file); |
This function closes file if it was open, then opens a new
file like fopen(filename, mode) (see section fopen)
but it reuses file.
This is useful to, for example, associate stdout with a new file.
The new file, or NULL on error.
| ANSI/ISO C | C89; C99 |
| POSIX | 1003.2-1992; 1003.1-2001 |
freopen("/tmp/stdout.dat", "wb", stdout);
|