On the twelfth day of Christmas, my true love sent to me: A program written in CPP!

twelve_days.cpp

#include <array>
#include <iostream>
#include <string>

#include <cstddef>

std::array<std::string, 12> ORDINAL_DAYS = {
    "first",
    "second",
    "third",
    "fourth",
    "fifth",
    "sixth",
    "seventh",
    "eighth",
    "ninth",
    "tenth",
    "eleventh",
    "twelfth",
};
std::array<std::string, 12> MY_TRUE_LOVE_GAVE_TO_ME = {
    "A partridge in a pear tree",
    "Two turtle doves",
    "Three French hens",
    "Four calling birds",
    "FIVE GOLD RINGS",
    "six geese a-laying",
    "seven swans a-swimming",
    "eight maids a-milking",
    "nine ladies dancing",
    "ten lords a-leaping",
    "eleven pipers piping",
    "twelve drummers drumming",
};

std::string on_the_nth_day_of_christmas(std::size_t day) {
    std::string verse = "On the " + ORDINAL_DAYS[day] + " day of Christmas my true love sent to me\n";
    for (std::size_t d = day + 1; d --> 0;) {
        if (day > 0 and d == 0) {
            verse += "And ";
        }
        verse += MY_TRUE_LOVE_GAVE_TO_ME[d];
        if (d != 0) {
            verse += ",\n";
        }
    }
    return verse;
}

int main() {
    for (std::size_t day = 0; day < 12; day++) {
        std::cout << on_the_nth_day_of_christmas(day) << std::endl;
    }
}