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//program to demonstrate multilevel inheritance, class boxweight is derived from base class box and class shipment is derived from class boxweight
#include<iostream.h>
#include<conio.h>
class box
{
    int width;
    int depth;
    int height;
    public:
    void bgetdata()
    {
        cout<<"\nenter width of box ";
        cin>>width;
        cout<<"\nenter depth of box ";
        cin>>depth;
        cout<<"\nenter height of box ";
        cin>>height;
    }
    void bshowdata()
    {
        cout<<"\nwidth of box is "<<width;
        cout<<"\ndepth of box is "<<depth;
        cout<<"\nheight of box is "<<height;
    }
};
class boxweight: public box
{
    float weight;
    public:
    void wgetdata()
    {
        bgetdata();
        cout<<"\nenter weight of box ";
        cin>>weight;
    }
    void wshowdata()
    {
        bshowdata();
        cout<<"\nweight of box is "<<weight;
    }
};
class shipment:public boxweight
{
    float cost;
    public:
    void sgetdata()
    {
        wgetdata();
        cout<<"\nenter shipping cost ";
        cin>>cost;
    }
    void sshowdata()
    {
        wshowdata();
        cout<<"\nshipping cost is "<<cost;
    }
};
void main()
{
    clrscr();
    shipment ob;
    ob.sgetdata();
    ob.sshowdata();
    getch();
}