diff options
Diffstat (limited to 'c05/ex07/ft_find_next_prime.c')
| -rw-r--r-- | c05/ex07/ft_find_next_prime.c | 19 |
1 files changed, 8 insertions, 11 deletions
diff --git a/c05/ex07/ft_find_next_prime.c b/c05/ex07/ft_find_next_prime.c index 80227da..d8650eb 100644 --- a/c05/ex07/ft_find_next_prime.c +++ b/c05/ex07/ft_find_next_prime.c @@ -10,10 +10,10 @@ /* */ /* ************************************************************************** */ -int is_prime(int nb) + +static int is_prime(int nb) { long unsigned int i; - long unsigned int nbu; if (nb <= 1) return (0); @@ -21,20 +21,17 @@ int is_prime(int nb) return (1); if (nb % 2 == 0 || nb % 3 == 0) return (0); - i = 1; - nbu = nb; - while (i * i <= nbu) + i = 5; + while (i * i <= nb) { - if (nbu % (i * 6 - 1) == 0) - return (0); - if (nbu % (i * 6 + 1) == 0) - return (0); - i += 1; + if (nb % i == 0 || nb % (i + 2) == 0) + return (0); + i += 6; } return (1); } -int ft_find_next_prime(int nb) +int ft_find_next_prime(int nb) { while (!is_prime(nb)) nb++; |