48 lines
1.3 KiB
Rust
48 lines
1.3 KiB
Rust
const ORDINALS: [&str; 12] = [
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"first", "second", "third", "fourth", "fifth", "sixth",
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"seventh", "eighth", "ninth", "tenth", "eleventh", "twelfth",
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];
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const GIFTS: [&str; 12] = [
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"Twelve drummers drumming",
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"Eleven pipers piping",
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"Ten lords a-leaping",
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"Nine ladies dancing",
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"Eight maids a-milking",
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"Seven swans a-swimming",
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"Six geese a-laying",
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"Five golden rings",
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"Four calling birds",
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"Three french hens",
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"Two turtle doves",
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"and a partridge in a pear tree.",
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];
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fn get_gifts(n: usize) -> String {
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match n {
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0 => String::from("A partridge in a pear tree."),
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_ => {
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// The highest index is 11, and we want
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// the highest index to start, so we can
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// easily have the cumulative list each verse.
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let gift_index = 11 - n;
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// Get the slice of the array of gifts, from
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// the index to the end of the array
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GIFTS[gift_index..]
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.to_vec() // So we have the join method that returns a string
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.join(",\n")
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}
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}
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}
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fn main() {
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for n in 0..12 {
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println!(
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"On the {} day of Christmas, my true love gave to me: \n{}\n",
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ORDINALS[n],
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get_gifts(n)
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);
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}
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}
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