#include <iostream>
    #include <vector>
    #include <iterator>
    #include <stddef.h>
    using namespace std;
    template<class myType>
    class Container
    {
        public:
        Container(size_t xDim, size_t yDim, myType const& defaultValue)
        : objData(xDim * yDim, defaultValue)
        , xSize(xDim)
        , ySize(yDim)
        {
        }
        myType& operator()(size_t x, size_t y)
        {
            return objData[y * xSize + x];
        }
        myType const& operator()(size_t x, size_t y) const 
        {
            return objData[y * xSize + x];
        }
        int getSize()
        {
            return objData.size();
        }
        void inputEntireVector(vector<myType> inputVector)
        {
            objData.swap(inputVector);
        }
        void printContainer(ostream& stream)
        {
            copy(objData.begin(), objData.end(),
            ostream_iterator<myType>(stream, ""/*No Space*/));
        }
        private:
        vector<myType> objData;
        size_t  xSize;
        size_t  ySize;
    };
    template<class myType>
    inline ostream& operator<<(ostream& stream, Container<myType>& object)
    {
        object.printContainer(stream);
        return stream;
    }
    void ContainerInterfacing();
    int main()
    {
        ContainerInterfacing();
        return 0;
    }
    void ContainerInterfacing()
    {
        static int const ConsoleWidth  = 95;
        static int const ConsoleHeight = 30;
        size_t width  = ConsoleWidth;
        size_t height = ConsoleHeight;
        Container<int> mySimpleContainer(width, height, 0);
        cout << mySimpleContainer.getSize() << endl;
        mySimpleContainer(0, 0) = 4;
    }

#include <iostream>
    #include <vector>
    using namespace std;
    class ComponentClass
    { 
        public:
        virtual void traverse() = 0;
    };
    class LeafClass: public ComponentClass
    {
        int number;
        public:
        LeafClass(int num)
        {
            number = num;
        }
        void traverse()
        {
            cout << number << ' ';
        }
    };
    class CompositeClass: public ComponentClass
    {
        vector < ComponentClass * > children;
        public:
        void add(ComponentClass *ptr)
        {
            children.push_back(ptr);
        }
        void traverse()
        {
            for (int k = 0; k < children.size(); k++)
                children[k]->traverse();
        }
    };
    int main()
    {
        CompositeClass containers[6];
        for (int k = 0; k < 5; k++)
            for (int L = 0; L < 4; L++)
                containers[k].add(new LeafClass(k *4+L));
            for (int m = 1; m < 5; m++)
                containers[0].add(&(containers[m]));
            for (int n = 0; n < 5; n++)
            {
                containers[n].traverse();
                cout << endl;
            }
    }