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/* -*- mode::rust;indent-tabs-mode::nil -*-
* Implementation of 99 Bottles of Beer
* http://99-bottles-of-beer.net/
*/
use std;
import int;
import str;
fn b1() -> str { ret "# of beer on the wall, # of beer."; }
fn b2() -> str {
ret "Take one down and pass it around, # of beer on the wall.";
}
fn b7() -> str {
ret "No more bottles of beer on the wall, no more bottles of beer.";
}
fn b8() -> str {
ret "Go to the store and buy some more, # of beer on the wall.";
}
fn sub(t: str, n: int) -> str unsafe {
let mut b: str = "";
let mut i: uint = 0u;
let mut ns: str;
alt n {
0 { ns = "no more bottles"; }
1 { ns = "1 bottle"; }
_ { ns = int::to_str(n, 10u) + " bottles"; }
}
while i < str::len(t) {
if t[i] == '#' as u8 { b += ns; }
else { str::unsafe::push_byte(b, t[i]); }
i += 1u;
}
ret b;
}
/* Using an interator */
fn ninetynine(it: fn(int)) {
let mut n: int = 100;
while n > 1 { n -= 1; it(n); }
}
fn main() {
ninetynine {|n|
log(debug, sub(b1(), n));
log(debug, sub(b2(), n - 1));
#debug("");
};
log(debug, b7());
log(debug, b8());
}
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