C/stdio.h/setvbuf

setvbuf: sets the buffer for stream to be buffer, with a size of "size_t size"

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//Header file: #include <stdio.h> //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.

1. include <stdio.h>

int main () {

 FILE *fp;
 fp=fopen ("myfile.txt","w");
 setvbuf ( fp , NULL , _IOFBF , 1024 );
 // File operations here
 fclose (fp);
 return 0;

}

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