static counter in c++

Question

I\'m trying to create a Data class whose objects each hold a unique ID.

I want the 1st object\'s ID to be 1, the 2nd to be 2, etc. I must use a st

Answer 1

Each instance of Data needs its own non-static member variable that stores its ID. A static variable can be used to store the last used ID which would be incremented in the constructor of Data.

Instead of a static counter, which is not thread-safe, consider using boost's uuid:

#include 
#include 
#include 
#include 

using boost::lexical_cast;
using boost::uuids::uuid;
using boost::uuids::random_generator;

std::string id_ = lexical_cast((random_generator())());