/****************************************************************************
 * beer-3.c
 *
 * David J. Malan
 * malan@harvard.edu
 *
 * Sings "99 Bottles of Beer on the Wall."
 *
 * Demonstrates hierarchical decomposition and parameter passing.
 ***************************************************************************/

#include <cs50.h>
#include <stdio.h>

// function prototype
void chorus(int b);

int main(void)
{
    // ask user for number
    printf("How many bottles will there be? ");
    int n = GetInt();

    // exit upon invalid input
    if (n < 1)
    {
        printf("Sorry, that makes no sense.\n");
        return 1;
    }

    // sing the annoying song
    printf("\n");
    for (int i = n; i > 0; i--)
    {
       chorus(i);
    }
}

/**
 * Sings about specified number of bottles.
 */
void chorus(int b)
{
    // use proper grammar
    string s = (b == 1) ? "bottle" : "bottles";
    string t = (b == 2) ? "bottle" : "bottles";

    // sing verses
    printf("%i %s of beer on the wall,\n", b, s);
    printf("%i %s of beer,\n", b, s);
    printf("Take one down, pass it around,\n");
    printf("%i %s of beer on the wall.\n\n", b - 1, t);
}