73 lines
1.1 KiB
Go
73 lines
1.1 KiB
Go
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// Package twelve outputs the lyrics to The Twelve Days of Christmas.
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package twelve
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import (
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"fmt"
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)
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var ordinals = [13]string{
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"zeroth",
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"first",
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"second",
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"third",
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"fourth",
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"fifth",
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"sixth",
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"seventh",
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"eighth",
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"ninth",
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"tenth",
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"eleventh",
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"twelfth",
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}
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var gifts = [13]string{
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"a null pointer",
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"a Partridge in a Pear Tree",
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"two Turtle Doves",
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"three French Hens",
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"four Calling Birds",
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"five Gold Rings",
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"six Geese-a-Laying",
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"seven Swans-a-Swimming",
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"eight Maids-a-Milking",
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"nine Ladies Dancing",
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"ten Lords-a-Leaping",
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"eleven Pipers Piping",
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"twelve Drummers Drumming",
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}
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func giftsForDay(day int) string {
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switch day {
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case 0, 1:
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return gifts[day]
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case 2:
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return fmt.Sprintf(
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"%s, and %s",
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gifts[day],
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gifts[day-1],
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)
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default:
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return fmt.Sprintf(
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"%s, %s",
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gifts[day],
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giftsForDay(day-1),
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)
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}
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}
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func Verse(day int) string {
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return fmt.Sprintf(
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"On the %s day of Christmas my true love gave to me: %s.",
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ordinals[day],
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giftsForDay(day),
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)
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}
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func Song() (song string) {
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for day := 1; day <= 12; day++ {
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song += fmt.Sprintf("%s\n", Verse(day))
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}
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return
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}
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