C Tutorial/stdio.h/setvbuf
setvbuf
Item Value Header file stdio.h Declaration int setvbuf(FILE *stream, char *buf, int mode, size_t size); Return returns zero on success, nonzero on failure.
Function sets the buffer for stream to be buffer, with a size of size.
Possible values of mode are _IOFBF, _IONBF, and _IOLBF.
- _IOFBF: full buffering.
- _IOLBF: line buffered.
- _IONBF: no buffering.
<source lang="cpp">#include <stdio.h>
int main ()
{
FILE *fp;
fp=fopen ("myfile.txt","w");
setvbuf ( fp , NULL , _IOFBF , 1024 );
// File operations here
fclose (fp);
return 0;
}</source>
