isPowerOfTen Number Alignment - Good Code ;-)

int isPowerOfTen(int x)
{
  if ( x == 10
    || x == 100
    || x == 1000
    || x == 10000
    || x == 100000
    || x == 1000000)
  return 1;

  return 0;
}

int count_numbers (int num) {
  int count=0;
  if (num == 0) count++;
  while (num !=0) {
    count++;
    num/=10;
  }
  return count;
}

int main() {
// int size;
// int array[size];
// int counter;
// int j, l;

l=count_numbers(size-1)-1;
for (j=0; j<l; j++) printf(" ");
printf("# : Value\n");
for(counter = 0; counter < size; counter++) {
    if (isPowerOfTen(counter)) l--;
    for (j=0; j<l; j++) printf("0");

    printf("%i : %i\n", counter, array[counter]);
    }
}