Recursive function to check if all digits in an int variable are even

Question

I am trying to write a recursive function to check whether a user input a number which contains all even digits.

What is wrong with my logic? When I tried with "556" result is 1.

int main()
{
    int num;
    int *result;
    printf("Enter a number: ");
    scanf("%d", &num);
    allEven(num, &result);
    printf("allEven(): %d", result);

}
void allEven(int number, int *result)
{
    if ((number % 10) % 2) // if the last digit is odd
    {
        *result = 0;
    }
    else
    {
        *result = 1;
        if ((number / 10) != 0) //not the last digit to evaluate, we call the function again.
        {
            allEven((number / 10), &result);
        }
    }
}

Answer 1

allEven((number / 10), &result); should be replaced with

allEven((number / 10), result);

Because allEven expects second argument of type int * and &result is int **

Also int *result should be int result = 1

Working example here

If you compile with proper warning flags -W -Wall for example on gcc (better with -O2), you should get proper warnings to correct your code.