Is it possible to forbid a method in the class to get inherited in child class?

Question

Let's say I have an exe-file (for example computer game) and need to forbid to run it until certain date or time during the day. Any 'manipulations' with file are allowed.

Could you, please, offer me a simple way of how to encode/decode such a file mostly in C or C++?

Answer 1

See the following program where we are forcing Dog to provide its own Greeting:
Credit: http://stackoverflow.com/questions/36967347/forbid-inheritance

#include <iostream>
#include <string>

class Animal {
public:
    virtual void SetColor(const std::string & col)
    {
        colour = col;
    }

    virtual void Greeting(const std::string & name) = 0;

protected:
    std::string colour;
};

class Dog : public Animal {

    virtual void Greeting(const std::string & name) override
    {
        std::cout << "Hi I'm a dog. My name is " << name << ". I was forced to provide this function.\n";

    }
};

int main(void)
{
    Animal *ptr = new Dog();
    ptr->Greeting("Fluffy");
    delete ptr;
    return 0;
}