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use words::{Words, Word};
pub struct Tens(u8, u8);
impl Tens
{
pub fn new(val: usize) -> Tens
{
assert!(val < 100);
let val = val as u8;
let tens_place = val / 10;
let ones_place = val % 10;
Tens(tens_place, ones_place)
}
pub fn build(&self) -> Option<Words>
{
if self.0 * 10 + self.1 < 20
{
if self.0 * 10 + self.1 == 0
{
return None
}
return Some(Words::new(vec![Word::Number(match self.0 * 10 + self.1
{
1 => "one",
2 => "two",
3 => "three",
4 => "four",
5 => "five",
6 => "six",
7 => "seven",
8 => "eight",
9 => "nine",
10 => "ten",
11 => "eleven",
12 => "twelve",
13 => "thirteen",
14 => "fourteen",
15 => "fifteen",
16 => "sixteen",
17 => "seventeen",
18 => "eighteen",
19 => "nineteen",
_ => unreachable!()
}.to_owned())]))
}
else
{
let tens = match self.0
{
2 => "twenty",
3 => "thirty",
4 => "forty",
5 => "fifty",
6 => "sixty",
7 => "seventy",
8 => "eighty",
9 => "ninety",
_ => unreachable!()
};
if self.1 == 0
{
return Some(Words::new(vec![Word::Number(tens.to_owned())]))
}
else
{
let ones = match self.1
{
0 => "zero",
1 => "one",
2 => "two",
3 => "three",
4 => "four",
5 => "five",
6 => "six",
7 => "seven",
8 => "eight",
9 => "nine",
_ => unreachable!()
};
return Some(Words::new(vec![
Word::Number(tens.to_owned()),
Word::Dash,
Word::Number(ones.to_owned())
]))
}
}
}
}