having fun with C++ metaprogramming and 99 bottles of beer.

99bottles.cpp

#include <cstdlib>
#include <cstdio>

template <int N>
struct bottles;

template <>
struct bottles<100>
{
};

template <int N>
struct bottles: bottles<N + 1>
{
	bottles()
	{
		std::printf("%d bottles of beer on the wall, %d bottles of beer.\n", N, N);
		std::printf("Take one down and pass it around, %d bottles of beer on the wall.\n", N - 1);
		std::printf("\n");
	}
};

template <>
struct bottles<1>: bottles<2>
{
	bottles()
	{
		std::printf("1 bottle of beer on the wall, 1 bottle of beer.\n");
		std::printf("Take one down and pass it around, no more bottles of beer on the wall.\n");
		std::printf("\n");
	}
};

template <>
struct bottles<0>: bottles<1>
{
	bottles()
	{
		std::printf("No more bottles of beer on the wall, no more bottles of beer.\n");
		std::printf("Go to the store and buy some more, 99 bottles of beer on the wall.\n");
		std::printf("\n");
	}
};

struct _99_bottles_of_beer: bottles<0> {};

int
main(int argc, char * argv[])
{
	_99_bottles_of_beer();
}