Simple inheritance example??

Hello,

I want to learn inheritance for a game that I am trying to write, but can't find any good examples. Could someone write 2 simple classes where one is derived from the other?? I'd really appreciate it! Also, if you could thoroughly explain what you're doing it'd really help me. Thanks a lot!

Code:

---


//base class

class Human
{
    protected:
        int life;
    public:
        virtual void Die() = 0;
        virtual void Damage( int dmg ) = 0;
};

//derived class 1

class Civilian : public Human
{
    public:

    Civilian()
    {
        life = 10;
    }
    void Die()
    {
        printf( "...dead" );
    }
    void Damage( int dmg )
    {
        life = life - dmg;
        if( life < 0 ) Die();
    }
};

//derived class 2

class Soldier : public Human
{
    public:

    Soldier()
    {
          life = 15;
    }
    void Die()
    {
        printf( "...throwing last handgrenade... dead" );
    }
    void Damage( int dmg )
    {
        life = life - ( dmg - 1 ); // 1 point armor
        if( life < 0 ) Die();
    }
};

void Hurt( Human& person )
{
    person.Damage( 5 );
}

int main()
{
    Civilian a;
    Soldier b;

    Hurt( a );
    Hurt( a );
    Hurt( a );
    Hurt( a );

    Hurt( b );
    Hurt( b );
    Hurt( b );
    Hurt( b );
    Hurt( b );
    Hurt( b );

    return 0;
}

---

Great example. But if you put Hurt as a virtual function in your base class you could either except it or change Hurt's power rather than adjusting it in Damage. Then it would be completely polymorphic.

I could just call Damage( 5 ) on a and b in main, but that would
defeat the purpose of showing that you can now have a generic
Human and don't care what type it is... :p

That was cool :cool:


Marky_Mark