Variable to Point to a Vector

Question

I'm attempting to make a command line side scrolling shooter. However, I am struggling to get the inheritance and class/struct structure set up for the different ship types. However, there is a fair chance that I am completely misunderstanding how to go about this.

class Ship
{
int health;
float charging;
bool charged;
coords location;
bool shielded;
int chargeSpeed;
int cannons;
int shieldHealth;

struct enemyShip
{
    int speed;
    shipType type;
};

struct bossShip
{
    int Bonuspoints;
};

struct myShip
{
    int lives;
    int points;
    int isDead;
};
void createShip(shipType type, int speed, int health, bool shields, int cannons, int chargeSpeed, int bonusPoints)
{
    switch (type)
    {
    speeder:
        Ship::enemyShip newShip;
        newShip.speed = 0;

        ships.push_back(newShip);
    bruiser:
    sprayer:
    boss:

    }
}
};

That's theShip class as it stands currently. My idea was that I will be able to pass the parameters to the createShip method (from my gameloop) and that will create a new Ship of the correct type and then dump it into the list of ships (which is global).

However, whilst I can easily access the attributes of my newShip object that belong to whichever struct has been used to create it, in the case shown I can use newShip.speed after newShip = Ship::enemyShip newShip; to access these. However, I cannot work out how to access all of the attributes that it will have inherited from the parent class; such as health, charging, etc.

Any help would be appreciated, I have searched, however, most answers simply say this->x = x::x or something of that ilk, and I have tried newShip->health = 100 and that doesn't work. Consequently, either a little more detail would be appreciated or a completely different answer.

Thanks in advance!

[There is no inheritance here.](http://www.learncpp.com/cpp-tutorial/112-basic-inheritance-in-c/) — BoBTFish, Jan 15 '16 at 10:46
Hang on, so you can't just place structs/classes inside eachother? — ScottishTapWater, Jan 15 '16 at 10:55
You can put it there it you like, but it won't inherit from the containing class. Have you seen [The Definitive C++ Book Guide and List](http://stackoverflow.com/q/388242/1171191)? — BoBTFish, Jan 15 '16 at 11:03

score 2 · Accepted Answer · answered Jan 15 '16 at 11:13

2

You need to hoist (for example) enemyShip out of Ship and declare it as:

struct enemyShip : Ship
{
    int speed;
    shipType type;
};

The : Ship says that enemyShip derives from Ship.

You will then need to define createShip outside struct Ship (because inside Ship enemyShip won't be properly defined).

answered Jan 15 '16 at 11:13

Martin Bonner supports Monica

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As @BobTFish implies, I think you need a good C++ book. You need to be writing header files, and all sorts of stuff that is really too long for an SO answer. – Martin Bonner supports Monica Jan 15 '16 at 11:16
Ahh brilliant, totally misunderstood all of the inheritance stuff. Thanks for your help! – ScottishTapWater Jan 15 '16 at 11:59

Variable to Point to a Vector

1 Answers1