gistfile1.txt

type T = int;

priv fn ioprintnum(num: T) {
    let mut buf: ~[u8] = ~[];
    let mut deccum = if num < 0 as T {-num} else {num};
    loop {
        let d = deccum % 10 as T;
        deccum /= 10 as T;
        buf.push(match d {
            0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9     => '0' as u8 + d as u8,
            _ if d > 9 => fail ~"too high",
            _ if d < 0 => fail ~"too low",
            _          => fail
        });
        if !(deccum > 0 as T) { break; }
    }
    if num < 0 {
        buf.push('-' as u8);
    }
    vec::reverse(buf);
    io::print(str::from_bytes(buf));
    io::print("\n");
}

fn main() {
    let mut i: T = 1;
    loop {
        ioprintnum(i);
        i *= 2 as T;
    }
}