#include #include // for std::setw using json = nlohmann::json; int main() { // create a JSON value json j = R"({"compact": true, "schema": 0})"_json; // serialize it to MessagePack std::vector v = json::to_msgpack(j); // print the vector content for (auto& byte : v) { std::cout << "0x" << std::hex << std::setw(2) << std::setfill('0') << (int)byte << " "; } std::cout << std::endl; }