#include <iostream>
#include <cstdlib>
#include <string>   // for class string
using namespace std;

int main( )
{
    const string a[ ] {
        "",	                      // dummy element has subscript 0
        "A partridge in a pear tree", // 1
        "Two turtledoves",            // 2
        "Three French hens",          // 3
        "Four colly birds",           // 4
        "Five golden rings",          // 5
        "Six geese a-laying",         // 6
        "Seven swans a-swimming",     // 7
        "Eight maids a-milking",      // 8
        "Nine ladies dancing",        // 9
        "Ten lords a-leaping",        // 10
        "Eleven pipers piping",       // 11
        "Twelve drummers drumming"  // 12
    };

    const string ordinals[] {
        "",              // dummy element
        "first", "second", "third", "fourth", "fifth", "sixth",
        "seventh", "eighth", "ninth", "tenth", "eleventh", "twelfth"
    };

    const size_t ndays {size(a) - 1};  // Don't count the dummy.

    for (int day {1}; day <= ndays; ++day) {
        cout << "On the " << ordinals[day] << " day of Christmas\n"
             << "My true love gave to me\n";

        for (int gift {day}; gift >= 1; --gift) {
            if (gift == 1 && day != 1) {
                cout << "\tAnd " << a[gift] << "\n";
            } else {
                cout << "\t" << a[gift] << "\n";
            }
        }

        cout << "\n";   // Skip a line after each day.
    }

    return EXIT_SUCCESS;
}