class DataStreamExcept : public Exception 
{
protected:
    static const std::string codes[] =
      {
        "Cannot open stream",
        "Cannot close stream"
      };
};


stream.cpp:28: error: a brace-enclosed initializer is not allowed here before ‘{’ token
stream.cpp:31: error: invalid in-class initialization of static data member of non-integral type ‘const char* []’