Two's complement: Difference between revisions
m
Made code moreC++ idiomatic.
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m (Made code moreC++ idiomatic.) |
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The two's complement of an integer 'n' can also be calculated by adding 1 to its bitwise complement '~n'.
<syntaxhighlight lang="c++">
#include <cstdint>
#include <iostream>
#include <iomanip>
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#include <bitset>
std::string to_hex(const int32_t number) {
std::stringstream stream;
stream << std::setfill('0') << std::setw(8) << std::hex << number;
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}
std::string to_binary(const int32_t number) {
std::stringstream stream;
stream << std::bitset<16>(number);
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}
int32_t twos_complement(const int32_t number) {
return ~number + 1;
}
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<< std::setw(20) << "----------------" << std::setw(20) << "----------------" << std::endl;
for ( const int32_t& example : examples ) {
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;
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