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//Header file: #include <stdio.h>
//Declaration: void setbuf(FILE *stream, char *buf);
#include <stdio.h>
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);
//Set buf to null to turn off buffering.
//The buffer must be BUFSIZ characters long.
//BUFSIZ is defined in <stdio.h>.
fclose (fp1);
fclose (fp2);
return 0;
}
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