What is the difference between override and final in C++?

Question

Accepted Answer

**override** — ensures virtual function override. **final** — prevents further overriding.

```cpp
class Base {
public:
    virtual void func() {
        std::cout << "Base
";
    }

virtual void pureFunc() = 0;
};

class Derived : public Base {
public:
    // override — compile-time check
    void func() override {
        std::cout << "Derived
";
    }

// final — no more overriding
    void pureFunc() final override {
        std::cout << "Final
";
    }
};

// class MoreDerived : public Derived {
// public:
//     void pureFunc() override {}  // Error! final
// };
```

**override:**
- Compile-time check.
- Ensures function overrides virtual.
- Catches typos in function signature.

**final:**
- Can be on class or method.
- Prevents further overriding.
- Enables compiler optimizations.

C++: What is the difference between override and final in C++?