+ 1

In the below program,How to call a base class from its derived class ?

#include <iostream> using namespace std; class Area { public: int calc(int l, int b) { return l*b; } }; class Perimeter { public: int calc(int l, int b) { return 2 * (l + b); } }; /* Rectangle class is derived from classes Area and Perimeter. */ class Rectangle: ________________ { // Inherit the required base classes private: int length, breadth; public: Rectangle(int l, int b) : length(l), breadth(b) {} int area_calc() { /* Calls calc() of class Area and r

28th Mar 2017, 7:21 AM
keerthiga
keerthiga - avatar
2 odpowiedzi
+ 4
Why would you have area and perimeter as classes? I think their use is as a function. What is your over all goal? I think, depending on what your goal is, that you should have one parent class called Shape with the member functions 'area' and 'perimeter'. Like this: class Shape { protected: int area; int perimeter; public: virtual void calc_area() = 0; virtual void calc_perim() = 0; }; class Rectangle: public Shape { private: int length; int breadth; public: void calc_area() { area = length * breadth; } .... }; Something like this? Once again, it depends on what your overall goal is. Happy coding! https://code.sololearn.com/c8L9NNHNDUKO
10th Apr 2017, 3:59 AM
Zeke Williams
Zeke Williams - avatar
+ 1
class Rectangle { public: int calc_area(){return l*b;} int calc_perimeter(){return 2*(l+b); } private: int l; int b; }; isn't better? object oriented is very well but we most use enough classes.
28th Mar 2017, 8:35 AM
mohamad mahjoob
mohamad mahjoob - avatar