Variable Value not recognized outside of Class

[TarikNeaj]

Im currently working on creating a game engine and I'm having a bit of trouble with one thing, would love some fresh eyes on this problem, I'll give an example. It's semi-psuedo code.

Class_A
{
public:
    void fill()
    {
        vec.pushback(5);
        vec.pushback(6);
    }
    std::vector<int> vec;
}


#include Class_A

Class_B
{
public:
   Class_A object;
   void check()
   {
      std::cout << object.vec[0] << std::endl; // Gives me out of range, because 
      // the size of the vec is 0 from this class. Why cant how can I get around  
      // the problem?
   }
}

Edit: Class A fill is being called before Class B check. I've even printed out the size at the end of the function fill() and it says 2.

[Peter87]

Are you calling fill() on the same object?


Something like this should work.

Class_B b;
b.object.fill();
b.check();

Something like this will not work because a is not the same object as b.object.

Class_A a;
a.fill();
Class_B b;
b.check();

[TarikNeaj]

That makes sense, I tried something and what you said was the problem, just have to find a way to change things so it's implemented correctly. Thank you.