Class Help

[dpixel]

I'm trying to learn classes. I was originally using a struct for this.
Is there a way to incorporate my variable, "numbombs" without making it part of the object array? Or maybe a better way of going about this.

int numbombs = 30;
class BombClass{
    public:
        void setX(int X){
            x = X;
        }
        void setY(int Y){
            y = Y;
        }
        int getX(){
            return x;
        }
        int getY(){
            return y;
        }
        void setAvailable(bool a){
            available = a;
        }
        bool getAvailable(){
            return available;
        }
        BombClass();
    private:
        int x;
        int y;
        bool available;
};
BombClass bomb[99];
BombClass::BombClass()  //Constructor
{
    for(int i = 1; i <= numbombs; i++)
    {
        bomb[i].setX(rand() %3400 + 200); 
        bomb[i].setY(50); //rand() %200;
        bomb[i].setAvailable(true);
    }
}

[Josue Molina]

Why don't you want to make it part of the object array? Is it because every object will have a copy of it?

[dpixel]

Yes. It just doesn't seem like that's how it should be done.

[Josue Molina]

Make it part of the class, but declare it as a static variable. Then, memory for only one instance will be allocated, and all the objects will share it.

[dpixel]

The way I have the code above is the way I want it to work only with "numbombs" within the class. Another words...I wouldn't want call it with an index number.

I'd like to call it with a class method like:

bomb.setNumbombs(30)

Not like:

bomb[index].setNumbombs(30)

I think a static variable only holds it's value out of scope. I just don't want to refer to it within an array.

[Josue Molina]

Check this out (and read the comments):

#include <iostream>
#include <cstdlib>

using namespace std;

class BombClass
{
public:
    // Move numbombs into the class, declaring it as static.
    static int numbombs;

    void setX(int X)
    {
        x = X;
    }

    void setY(int Y)
    {
        y = Y;
    }

    int getX()
    {
        return x;
    }

    int getY()
    {
        return y;
    }

    void setAvailable(bool a)
    {
        available = a;
    }

    bool getAvailable()
    {
        return available;
    }

    BombClass()
    {
        BombClass bomb[99];
        for(int i = 1; i <= numbombs; i++)
        {
            bomb[i].setX(rand() % 3400 + 200); 
            bomb[i].setY(50);
            bomb[i].setAvailable(true);
        }
    }
private:
    int x;
    int y;
    bool available;
};

// Initialize numbombs (this is required).
int BombClass::numbombs = 30;

int main()
{
    // You can modify numbombs whenever you want,
    // without having to initialize an object.
    BombClass::numbombs = 40;
    
    return 0;
}

Also, recall that static can be used in three different ways, one of them being what you wrote above.

[dpixel]

I see how your doing that. I also didn't know I could initialize objects from within the constructor.
Can I initialize numbombs from within the constructor as well?

This is very helpful by the way, Thanks.

[dpixel]

Apparently you can't initialize objects from within the constructor or the class?

I'm getting "bomb" was not declared in this scope throughout my program.