Item Value
Header filestdio.h
Declarationvoid setbuf(FILE *stream, char *buf);
Functionspecifies the buffer that stream will use or,
Set buf to null to turn off buffering.
The buffer must be BUFSIZ characters long.
BUFSIZ is defined in .
#include
int main ()
{
char buffer[BUFSIZ];
FILE *fp1, *fp2;
fp1=fopen ("test.txt","w");
fp2=fopen ("test2.txt","a");
setbuf ( fp1 , buffer );
fputs ("This is sent to a buffered stream",fp1);
fflush (fp1);
setbuf ( fp2 , NULL );
fputs ("This is sent to an unbuffered stream",fp2);
fclose (fp1);
fclose (fp2);
return 0;
}