class header for my puzzle class

puzzle.h

class puzzle
{
    public:
        puzzle(std::string solution);
        //method for guesses
        bool guess(char);
        void printsol();
        //printing out bool values for testing
        bool getGuesses(int);
        //method to test the solution is valid
        void isSolValid();
        //getter for valid solution
        bool getSolVal();
    protected:

    private:
        std::string solution;
        bool guesses[255]{};
        bool isSolVal{true};

};