rust/src/test/bench/99-bottles/99bob-simple.rs

/* -*- mode::rust;indent-tabs-mode::nil -*- 
 * Implementation of 99 Bottles of Beer
 * http://99-bottles-of-beer.net/
 */
use std;
import std::int;
import std::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(str t, int n) -> str {
  let str b = "";
  let uint i = 0u;
  let str ns;
  alt (n) {
    case (0) {
      ns = "no more bottles";
    }
case (1) {
    ns = "1 bottle";
  }
 case (_) {
    ns = int::to_str(n, 10u) + " bottles";
  }
  }
  while (i < str::byte_len(t)) {
    if (t.(i) == ('#' as u8)) {
      b += ns;
    }
    else {
      str::push_byte(b, t.(i));
    }
    i += 1u;
  }
  ret b;
}

/* Straightforward counter */
fn main() {
  let int n=99;
  while (n > 0) {
    log sub(b1(), n);
    log sub(b2(), n - 1);
    log "";
    n -= 1;
  }
  log b7();
  log sub(b8(),99);
}