挑错，C语言写函数来分割整数

#include
#include

int SeparatingDigits(int num);/function prototype/

int main(void){

int i, a;/*the integer*/
int n = 1;/*the number of times*/
int digits;/*separating digits*/

运行后说我用0除integer
printf("input the number i :");/obtain two integers from usser/
scanf_s("%d", &i);

    /*separete the intger user input*/
    digits = SeparatingDigits(i);

    /*display the result*/
    printf("the separated number :%d  ", digits);

    return 0;

}/*end main*/

int SeparatingDigits(int num){

int i, a;/*the integer*/
int n = 1;/*the number of times*/
int digits;/*separating digits*/

for (i = 1; i <= 32767; i++) {
a = i;

    while (i > 9) {
        i /= 10;
        n *= 10;
    }
    while (n > 0) {
        
        a %= n;
        n /= 10;
        
    }
    return digits = a / n;
}

}/end the main/