Rust Roman Numeral Kata (Lambda Lounge 3/16)

rust_roman_numeral_kata

// use std::io;

fn main() {
    // println!("What is your favorite color?");
    
    println!("{}", 5);
}

fn get_input()->i32{

   2951

}

fn romanize(input:i32) -> String {
  if input > 0 && input <= 3000 {
    let mut result = String::new();
    let m = 1000;
    let d = 500;
    //let c = 100;
    //let l = 50;
    //let x = 10;
    //let v = 5;
    //let i = 1;

    let (ms, remainder) = how_many(m, input);
    let (ds, remainder) = how_many(d, remainder);

    lotta_letters(ms, "M", &mut result);
    lotta_letters(ds, "D", &mut result);
    
    result.to_string()
  } else {
    "Give me a number between 0 and 3000".to_string()
  }
}

fn how_many(divisor : i32, number : i32) -> (i32, i32) {
   let ms = number / divisor;
   let remainder = number - (ms * divisor);
   (ms, remainder)
}

fn lotta_letters(how_many : i32, what : &str, result:&mut String) {

    for _ in 0..how_many {
        result.push_str(what);
    }
}