class individual
{
    public:
        individual(const individual &x);
        individual(class tree *_tree);
        individual(class tree *_tree,  bool randomly);
        ~individual();

        int fitness();
        void mutation();
        void recombination(individual ind1, individual ind2);

        individual* operator=(const individual &ind);
        bool operator<(individual &ind);
        bool operator==(individual &ind);

        int *gene;
        tree *_tree_;
};