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  1. #include <iostream>
  2. #include <string>
  3.  
  4. class shape
  5. {
  6. public:
  7.     void setValues(int height_, int width_)
  8.     {
  9.         height = height_;
  10.         width = width_;
  11.     }
  12.  
  13.     virtual int area() = 0;  // This is needed for polymorphism to work
  14.  
  15.     virtual std::string name() = 0;
  16.  
  17. protected:
  18.     int height;
  19.     int width;
  20. };
  21.  
  22. class rectangle : public shape
  23. {
  24. public:
  25.     int area()
  26.     {
  27.         return height * width;
  28.     }
  29.  
  30.     std::string name()
  31.     {
  32.         return "Rectangle";
  33.     }
  34. };
  35.  
  36. class triangle :public shape
  37. {
  38. public:
  39.     int area()
  40.     {
  41.         return height * width / 2;
  42.     }
  43.  
  44.     std::string name()
  45.     {
  46.         return "Triangle";
  47.     }
  48. };
  49.  
  50. void print_area(shape& poly)
  51. {
  52.     std::cout << poly.name() << ' ' << poly.area() << '\n';
  53. }
  54.  
  55. int main()
  56. {
  57.     rectangle rect;
  58.     triangle trng;
  59.  
  60.     rect.setValues(2, 3);
  61.     trng.setValues(5, 4);
  62.  
  63.     print_area(rect);
  64.     print_area(trng);
  65. }
  66.  
Success #stdin #stdout 0s 3412KB
comments (?)
stdin 
Standard input is empty
stdout 
Rectangle 6
Triangle 10
https://ideone.com/d0ZJDl
language:
C++ (gcc 8.3)
created:
9 years ago
visibility:
public

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