Unary.cpp

Unary.cpp

#include <iostream>
#include <string>
#include <optional>


class MessageEncoder {
    std::optional<int> current_digit = std::nullopt;
    std::string output;

public:
    void accumulate(char letter);
    [[nodiscard]] const std::string & get_output() const { return output; }

private:
    void accumulate_digit(int digit);
};

void MessageEncoder::accumulate(const char letter) {
    accumulate_digit(letter & 0x40 ? 1 : 0);
    accumulate_digit(letter & 0x20 ? 1 : 0);
    accumulate_digit(letter & 0x10 ? 1 : 0);
    accumulate_digit(letter & 0x08 ? 1 : 0);
    accumulate_digit(letter & 0x04 ? 1 : 0);
    accumulate_digit(letter & 0x02 ? 1 : 0);
    accumulate_digit(letter & 0x01 ? 1 : 0);
}

void MessageEncoder::accumulate_digit(const int digit) {
    if (current_digit && *current_digit != digit) {
        output += ' ';
        current_digit = std::nullopt;
    }

    if (!current_digit) {
        if (digit == 1) output += "0 ";
        else output += "00 ";
    }

    current_digit = digit;
    output += '0';
}

int main() {
    std::string message;
    std::getline(std::cin, message);

    MessageEncoder encoder;

    for (const char letter : message) {
        encoder.accumulate(letter);
    }

    std::cout << encoder.get_output() << "\n";
}