3 std::string 
json_encode(std::map<std::string, std::string> parameters) {
 
    8   for(std::map<std::string, std::string>::iterator it = parameters.begin(); it != parameters.end(); ++it) {
 
    9     jValues[(*it).first] = (*it).second;
 
   12   return(w.write(jValues));
 
std::string json_encode(std::map< std::string, std::string > parameters)