Am 28.04.2013 19:10, schrieb Sami Kerola:
> -/* leap year -- account for gregorian reformation in 1752 */
> -#define leap_year(yr) \
> - ((yr) <= 1752 ? !((yr) % 4) : \
> - (!((yr) % 4) && ((yr) % 100)) || !((yr) % 400))
> [...]
> +/* leap year -- account for gregorian reformation in 1752 */
> +int leap_year(int year)
> +{
> + if (year <= 1752)
> + return !(year % 4);
> + else
> + return !(year % 4 && (year % 100 || year % 400));
> +}
This formula is incorrect, there's a difference between the old version
and yours. The original (correct) version is:
( !(year % 4) && (year % 100) ) || !(year % 400)
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