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  1. #include<iostream>
  2. using namespace std;
  3.  
  4. class CPolygon {
  5.   protected:
  6.     int width, height;
  7.   public:
  8.     void set_values (int a, int b) {
  9.       width = a;
  10.       height = b;
  11.     }
  12. };
  13.  
  14. class CRectangle : public CPolygon {
  15.   public:
  16.     int area () {
  17.       return (width * height);
  18.     }
  19. };
  20.  
  21. class CTriangle : public CPolygon {
  22.   public:
  23.     int area () {
  24.       return (width * height / 2);
  25.     }
  26. };
  27.  
  28. int main() {
  29.     CRectangle rect;
  30.     CTriangle trgle;
  31.     rect.set_values(4, 5);
  32.     trgle.set_values(4, 5);
  33.     cout << rect.area() << endl;
  34.     cout << trgle.area() << endl;
  35.     return 0;
  36. }
  37. /*
  38. CPloygon::width and CPloygon::height are protected class members.
  39. CRectangle::width and CRectangle::height are protected class members.
  40. CTriangle::width and CTriangle::height are protected class members.
  41. CRectangle::set_values is a public member function.
  42. CTriangle::set_values is a public member function.
  43. CRectangle and CTriangle are derived classes of the base class CPolygon.
  44. */
Success #stdin #stdout 0.01s 5288KB
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https://ideone.com/iuHQ38
inheritance part-1 C-1
language:
C++14 (gcc 8.3)
created:
2 days ago
visibility:
public

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