题解 | #牛牛的二三七整除#

#include <stdio.h>
int main() {
    int numInt, flag = 0;
    int a[] = {2, 3, 7};

    while (scanf("%d", &numInt) != EOF) {
        getchar();
        for (int i = 0; i < (sizeof(a) / sizeof(int)); i++) {
            if (numInt % a[i] == 0) {
                printf("%d ", a[i]);
                flag = 1;
            }
        }
        if (!flag) {
            printf("n");
        }
    }

    return 0;
}