class-members

Here is my code: class Soldier { public: Soldier(const string &name, const Gun &gun); string getName(); private: Gun gun; string name; }; class Gun { public: void fire(); void load(int bullets); int getBullets(); private: int bullets; } I need to call all the member functions of Gun over a Soldier object. Something like: soldier.gun.fire(); or soldier.getGun().load(15); So which one is a better design? Hiding the gun object as a private member and access it with getGun() function. Or making it a public member? Or I can encapsulate all these functions would make the implementation harder:

I have a code below, i want to modify class's variables in static function but there is some error. How can i fix it with "this" pointer? There is no access to "this" pointer for static members in class,on the other hand I am trying to make an access to class variables in Static member function, therefore i am looking for a way to use "this" pointer of class "me" to do it. class me { public: void X() { x = 1;} void Y() { y = 2;} static void Z() { x = 5 ; y = 10; } public: int x, y; }; int main() { me M; M.X(); M.Y(); M.Z(); return 0; } I got this error : invalid use of member ‘me::x’ in static

How do I reference class object inside class definition? Could you advice me how you would do it? Or more specifically how do you pass class object inside decorator of class method? Here is a simple example, I'm trying to pass second method I'm declaring to decorator of first one. def decorate(w): def _wrap(f): def _call(*args, **kwargs): return w(f(*args, **kwargs)) def _call return _wrap class A(): @dec(A.w) def f(): return 2 def w(f): return fr + 5 As expected exception is raised NameError: name 'A' is not defined As a result of my investigation i learned that globals() doesn't contain A

Consider the following code C++: #include<iostream> using namespace std; class Test { int &t; public: Test (int &x) { t = x; } int getT() { return t; } }; int main() { int x = 20; Test t1(x); cout << t1.getT() << " "; x = 30; cout << t1.getT() << endl; return 0; } It is showing the following error while using gcc compiler est.cpp: In constructor ‘Test::Test(int&)’: est.cpp:8:5: error: uninitialized reference member ‘Test::t’ [-fpermissive] Why doesn't the compiler directly call the Constructor? That is because references can only be initialized in the initializer list. Use Test (int &x) : t(x)

Why is it that the return type of setVal is of type string and the parameter type is of type double typedef string Type; Type initVal(); class Exercise { public: typedef double Type; Type setVal(Type); Type initVal(); private: int val; }; Type Exercise::setVal(Type parm) { val = parm + initVal(); return val; } When member functions are defined in namespace scope C++ provides special name lookup rules for unqualified names that follow the function’s declarator-id (3.4.1/8). Such names are looked up in class scope before they are looked up in namespace scope. Since the return type in an