#define POS false
#define NEG true

StringInt::StringInt(long int num)
{
    this->init(abs(num));
    this->sgn = (num < 0) ? NEG : POS;
}
//comment
StringInt::StringInt(unsigned long int num)
{
    this->init(num);
}

void StringInt::init(unsigned long int num)
{
    std::stringstream out;
    out << num;
    this->strint = StringInt::rvrs(out.str()); // reverse string
    this->sgn = POS;
}