BEGIN
{
	@a = 10;
	@b = 5;

	printf("a + b = %d\n", @a + @b);
}

END
{
	printf("a - b = %d\n", @a - @b);

	@c = @a + 2 * @b;
	printf("c = %d, total = %d\n", @c, (@c - @b) / 5);
}