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//program to demonstrate single level inheritance, class colourbox is derived from class box in public access mode #include<iostream.h> #include<conio.h> class box { int length; int breadth; int height; public: void bgetdata() { cout<<"\nenter length of box "; cin>>length; cout<<"\nenter breadth of box "; cin>>breadth; cout<<"\nenter height of box "; cin>>height; } void bshowdata() { cout<<"\nlength of box is "<<length; cout<<"\nbreadth of box is "<<breadth; cout<<"\nheight of box is "<<height; } }; class colourbox : public box { char colour[20]; public: void cgetdata() { bgetdata(); cout<<"\nenter colour of box "; cin>>colour; } void cshowdata() { bshowdata(); cout<<"\ncolour of box is "<<colour; } }; void main() { clrscr(); colourbox ob; ob.cgetdata(); ob.cshowdata(); getch(); }