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#include <stdio.h>
void writestuff (FILE *f)
{
fprintf (f, "hello world\n");
fputc ('y', f);
putc ('e', f);
}
void readstuff (FILE *f)
{
int c, d;
char stuff[100], *s;
c = fgetc (f);
ungetc (c, f);
d = fgetc (f);
s = fgets (stuff, sizeof(stuff), f);
}
int main ()
{
FILE *f;
writestuff (stdout);
writestuff (stderr);
f = fopen ("/dev/null", "w");
writestuff (f);
fclose (f);
f = fopen ("/dev/zero", "r");
readstuff (f);
f = freopen ("/dev/null", "w", f);
writestuff (f);
fclose (f);
return 0;
}
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