判断一组数中 两两一对的数 后者是否是前者的倍数

#include <stdio.h>

int multiple(int, int);

int main(){
    int x, y, tmp, counter = 0;
    printf("please enter some parts of integer(-1 to end):\n");
    scanf("%d%d", &x, &y);
    while(-1 != x && -1 != y){
        counter++;
        if( 1 == multiple(x, y))
            printf("the %d part of integer is multiple!\n", counter);
        else if(0 == multiple(x, y))
            printf("the %d part of integer is not a multiple:(\n", counter);
        tmp = getchar();
        scanf("%d%d", &x, &y);
    }
    return 0;
}

int multiple(int a, int b){
    return !(b % a);
}