int main(void) { int n,lcv,flag; // flag 被初始化为 1，如果后续判断 n 不是素数，那么它将变为 0 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);}...