Thread: Calling a constructor on a non-pointer after its declaration.

Hello. let's say I have the following class:

Code:

class A
{
public:
     A(int x) :x(x) {}

private:
     int x;
};

Now let's say I also have the following class:

Code:

class B
{
     public:
     B();

     private:
     A a;
};

B::B()
{
    a.A(5); // invalid
}

How do I fix that call to A's constructor without changing a to a pointer or something?

The same way as you initialize x in class A.

Code:

B::B() : a(5)

In the program I'm making right now though, I'm having to initialize a in something other than B's constructor though. kind of like this:

Code:

class B
{
public:
     void run();

private:
     A a;
};

void B::run()
{
     a.A(5); // invalid
}

Thanks!