从2部分中正确打印出整数

uint128_t

uint64_t UPPER, LOWER;

operator<<

std::cout

std::ostream & operator<<(std::ostream & stream, uint128_t const & rhs){
    if (rhs.upper())                  // if the upper value has a non-zero digit
        stream << rhs.upper();

    // i need some way to pad this so that the number of 0s between 
    // upper and lower is correct

    stream << rhs.lower();
    return stream;

UPPER = 1

LOWER = 1

(1 << 64) + 1

std::ostream & operator<<(std::ostream & stream, uint128_t const & rhs){

    if(rhs.upper() == 0)
        return stream << rhs.lower();

    char buffer[50];
    char *cp = buffer + 49;
    *cp = 0;
    while(rhs > 0)
    {
        --cp;
        *cp = (rhs % 10) + \'0\';
        rhs /= 10;
    }

    return stream << cp;
}