gistfile1.h

class Inner
{
    int x;
    public:
    Inner(int x);
};

class Outer
{
    Inner inner;
    public:
    Outer();
};

Outer::Outer ()
{
    this->inner = Inner(3);
}

Inner::Inner(int x)
{
    this->x = x;
}

int main(int argc, char **argv)
{
    Outer a = Outer();
}