mencari Bilangan prima

#include
#include
main ()
{
int N,X,BATAS,FLAG;
scanf ("%i",&N);
if (N==2)
printf("Prima");
else
{
if(N%2 == 0)
printf ("Bukan Prima");
else
{
X = 3;
BATAS = sqrt(N);
FLAG = 0;
while (FLAG == 0 && X <= BATAS) { if (N % X == 0) FLAG = 1; X = X + 2; } if (FLAG == 0) printf ("Prima"); else printf("Bukan Prima"); printf("\n"); } } }

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