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.
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1You need to be more specific. Perhaps post some example code.Dan– Dan2011-08-16 12:04:38 +00:00Commented Aug 16, 2011 at 12:04
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4 Answers
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;
}
1 Comment
PhiloRobotist
can i create a class variable without using
static keyword?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
- You made the class variable
protectedorprivate, thus rendering it inaccessible from other code. - You forgot to specify the full scope of the class variable (with
A::in this example).
2 Comments
buddy
THANK YOU. I would have accepted your answer too, but i had to decide.
PhiloRobotist
@frerichraabe can i create a class variable without using
static keyword?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.
Comments
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;
}
2 Comments
HolyBlackCat
OP wanted to do it "without creating an object".
Bomel
Best answer ever!