rdhiggins

template <typename STD_COLLECTION>
std::string as_hex_string(STD_COLLECTION&& collection) {
    std::stringstream ss;

    for (unsigned char c: std::forward<STD_COLLECTION>(collection))
        ss << std::setfill('0') << std::setw(2) << std::hex << static_cast<short>(c) << " ";

    return ss.str();
}

rdhiggins

string file_as_string(const string& path) {
    auto ss = ostringstream{};
    ifstream input_file(path);
    if (!input_file.is_open()) {
        cerr << "[ERROR] could not open file ‘" << path << "‘.n";
        exit(EXIT_FAILURE);
    }
    ss << input_file.rdbuf();
    return ss.str();
}

rdhiggins

#include <iostream>

int main() {
    std::cout << "Hello, World!" << std::endl;
    return 0;
}