Quick stdout unbuffered question

[Kleid-0]

If you set stdout to be unbuffered:
setvbuf(stdout,NULL,_IONBF,0);
Would there be any reason to use fflush(stdout)?

Thanks you guys :]

[jim mcnamara]

For unix this does just what you'd expect - outputs a few characters then pauses 1 second.
This means extra work for the kernel, by the way.

#include <stdio.h>

int main()
{
    setvbuf(stdout,NULL,_IONBF,0);
    for (unsigned int i=0;i<10;i++)
    {
        fprintf(stdout,"%d..",i);
        sleep(1);
    }
    fprintf(stdout,"\n");
    return 0;
}

.. fflush(stdout) is pointless in this context. Dunno for sure what Windows does...