CODEWITHSUNDEEP
c++classvariables
buddy
buddy

Reputation: 861

How access class variables in c++

Is it possible in c++ to access class variables in other classes without creating an object. I have tried to use static, but the other class doesnt recognize my variable. I have 3 classes. In two of those the sae variables should be used. In the third class I am changing the values. Would be grateful if you could help. Maybe youve got an example.

Upvotes: 6

Views: 64467

Answers (4)

Kriss Sachintha
Kriss Sachintha

Reputation: 11

yes you can bro, try this

struct car{

        string model;
        string paint;
        int price;


           };


         int main(){

          // creates an object of the class car

            car BMW;

          // assign the values
           bmw.model = "m sports";
            bmw.paint ="red";
            bmw.price = 24000;


              }

Upvotes: -1

DanDan
DanDan

Reputation: 10562

I think the Singleton Pattern would help, but I'm no big fan of it. A lot better design would be to have one class take ownership of the object, and pass references to this object to the other classes.

Upvotes: 0

Alok Save
Alok Save

Reputation: 206616

class Myclass
{

    public:
         static int i;
};

int Myclass::i = 10;


class YourClass
{

    public:
        void doSomething()
        {
             Myclass::i = 10;  //This is how you access static member variables
        }

};

int main()
{
    YourClass obj;
    obj.doSomething();
    return 0;
}

Upvotes: 7

Frerich Raabe
Frerich Raabe

Reputation: 94509

static is the right keyword here:

class A {
public:
  static int i; // <-- this is a class variable
};

class B {
public:
  void f() { A::i = 3; } // <-- this is how you access class variables
};

They only potential problem I can think of is that

  1. You made the class variable protected or private, thus rendering it inaccessible from other code.
  2. You forgot to specify the full scope of the class variable (with A:: in this example).

Upvotes: 5

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