| 10 | virtual ~Abase() = default; |
| 11 | explicit Abase(int val_) : val{val_} {} |
| 12 | int Get() const { return val * 10 + 3; } |
| 13 | virtual int Add(int other_val) const = 0; |
| 14 | |
| 15 | // Some compilers complain about implicitly defined versions of some of the following: |