Someone

#include <stdio.h>

int main(void) {
int n,
lcv,
flag; /* flag initially is 1 and becomes 0 if we determine that n
is not a prime */

 printf("Enter value of N > ");
scanf("%d", &n);
for (lcv=2, flag=1; lcv <= (n / 2); lcv++) {
if ((n % lcv) == 0) {
if (flag)
printf("The non-trivial factors of %d are: \n", n);
flag = 0;
printf("\t%d\n", lcv);
}
}
if (flag)
printf("%d is prime\n", n);
}