factor.c

/*
* Exercise 8-1b, factor.c
*/

#include <stdio.h>

int main(void){

    int i, j;

    int fa[8];
    for(i = 0; i < 8; i++) {
        scanf("%d", &fa[i]);
    }
    int o=0;
    for(i = 0; i < 8; i++) {
        for(j = i+1; j < 8; j++) {
            if(fa[j]%fa[i] == 0) {
                printf("%d %d\n", fa[i], fa[j]);
                o++;
            }
            else if(fa[i]%fa[j] == 0) {
                printf("%d %d\n", fa[i], fa[j]);
                o++;
            }
        }
    }
    if(o == 0) {
        printf("none.\n");
    }

    return 0;

}