//Header file: #include
//Declaration: int setvbuf(FILE *stream, char *buf, int mode, size_t size);
//Return: returns zero on success, nonzero on failure.
// Possible values of mode are _IOFBF, _IONBF, and _IOLBF.
//_IOFBF: full buffering.
//_IOLBF: line buffered.
//_IONBF: no buffering.
#include
int main ()
{
FILE *fp;
fp=fopen ("myfile.txt","w");
setvbuf ( fp , NULL , _IOFBF , 1024 );
// File operations here
fclose (fp);
return 0;
}