sumDigits.c

int sumDigits(int number)
{
  if(number<0)
    {number=-number;}
  else if(number == 0)
    {return 0;}
  int sum = 0;
  while(number>0)
  {
    if(number%10==0)
      {number = number/10;}
    else
      {number--;sum++;}
  }
  return sum;
}