class shape // parent class
{
        public:
                shape();
                void setlength(int);
                int getlength();
                void setwidth(int);
                int getlength();

        private:
                int length;
                int width;
};

class rectangle:public shape
// single : to identify the class that is inheriting (rectanlge is inheriting from shape)
// rectangle is a child of shape
// everything is copied from shape into rectangle
// can only access the parents public parts not private (-_-)

{
        public:
                rectangle();
                int area;
                int perimeter();
        private:
                friend int thing; //assigns friendship to a class allowing private variables to be access
};

class traingle:public shape //another child, sibling of rectangle
{
        public:

};