Thread: iteration revisited

Code:

/*writes a (non-NULL terminated) char array to the file f*/
void write_ch_arr(char *c, int i, FILE *f)
{
    while (i)
    {
        putc(c[i], f);
        --i;
    }
    return;
}

now the problem with this is that theoretically, since c can span the entire address range, int might not hold all possible addresses of c.

so what type should I make i?
is the only way to do this with pointer arithmetic? Can I do it with an index and iteration?

of course, this ignores the inefficiency of byte vs. block based transfers.

thanks