fizz_buzz.rs

use std::io::println;

fn main() {
  for num in range(1, 101) {
    let answer =
      if is_fifteen(num) {
        ~"FizzBuzz"
      } else if is_three(num) {
        ~"Fizz"
      } else if is_five(num) {
        ~"Buzz"
      } else {
        num.to_str()
      };

    println(answer)
  }
}

fn is_three(num: int) -> bool {
  num % 3 == 0
}

fn is_five(num: int) -> bool {
  num % 5 == 0
}

fn is_fifteen(num: int) -> bool {
  num % 15  == 0
}