Two's complement: Difference between revisions

The two's complement of an integer 'n' can also be calculated by adding 1 to its bitwise complement '~n'.

<syntaxhighlight lang="c++">

#include <iostream>

#include <iomanip>

#include <bitset>

std::stringstream stream;

stream << std::setfill('0') << std::setw(8) << std::hex << number;

}

std::stringstream stream;

stream << std::bitset<16>(number);

}

return ~number + 1;

}

<< std::setw(20) << "----------------" << std::setw(20) << "----------------" << std::endl;

std::cout << std::setw(6) << example << std::setw(17) << to_upper_case(to_hex(example))

<< std::setw(20) << to_binary(example) << std::setw(13) << twos_complement(example) << std::endl;