Kolokvium '16_1.2

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int a,b;
    int firstAndLast;
    int middleProduct;
    scanf("%d%d", &a, &b);
    int i;
    for (i=a;i<=b;++i)
    {
        middleProduct=MiddleDigitsP(i/10);
        firstAndLast=FirstDigit(i)*10+(i%10);
        if (middleProduct%firstAndLast==0)
        {
            if (middleProduct==0) continue;
            int division=middleProduct/firstAndLast;
            printf("%d : %d = %d x %d\n", i, middleProduct, firstAndLast, division);
        }
        //printf("%d %d \n", firstAndLast, middleProduct);
    }
    return 0;
}
int FirstDigit (int num)
{
    if (num<=9) return num;
    return FirstDigit(num/10);
}
int MiddleDigitsP (int num)
{
    if (num<=9) return 1;
    return (num%10) * MiddleDigitsP(num/10);
}