[RESOLVED] Nested Class Question

[GamerMax5]

I'm playing around with nested classes and I'm getting some rather strange output from what appears to be some rather simple numbers. Take a look at my program below.

#include <cstdlib>
#include <iostream>

using namespace std;

class A {
    protected:
        int d;
    public:
        class SubA {
            protected:
                int a;
            public:
                SubA() {};
                ~SubA() {};
                int getA() { return a; }
                void setA(int _a) { _a = a; }
        };
        class SubB {
            protected:
                int b;
            public:
                SubB() {};
                ~SubB() {};
                int getB() { return b; }
                void setB(int _b) { _b = b; }
        };
        class SubC {
            protected:
                int c;
            public:
                SubC() {};
                ~SubC() {};
                int getC() { return c; }
                void setC(int _c) { _c = c; }
        };
        
        A() {};
        ~A() {};
        int getD() { return d; }
        void setD(int _d) { _d = d; }
};

int main(int argc, char *argv[])
{
    //instantiate all the classes
    A dummy;
    A::SubA subADummy;
    A::SubB subBDummy;
    A::SubC subCDummy;
    
    //set up some values
    dummy.setD(5);
    subADummy.setA(10);
    subBDummy.setB(15);
    subCDummy.setC(20);
    
    //print them out to the screen
    cout << dummy.getD() << endl;
    cout << subADummy.getA() << endl;
    cout << subBDummy.getB() << endl;
    cout << subCDummy.getC() << endl;
    
    system("PAUSE");
    return EXIT_SUCCESS;
}

Now I'm expecting that during the output I should see this:

5
10
15
20

However there's an entirely different case. This is what the output looks like:

2013315389
2013327107
2013454920
7863840

I'm having a slight problem understanding what in the world is going on here. I understand the principals of nested classes but from what I can remember when I first started with these a long time ago, I've never seen this kind of output before. Can someone give me a hand here? Thanks a lot.

[EDIT] I wonder if those first three output number are phone numbers?