1. #include <iostream>
2. #include <vector>
3. #include <cmath>
4.  
5. using namespace std;
6.  
7. template<typename T>
8. void Swaper(T & a, T & b)
9. {
10.     T temp = a;
11.     a = b;
12.     b = temp;
13. }
14.  
15. class Bryla
16. {    
17.    private:
18.    
19.    public:
20.        virtual double Objetosc() = 0;
21. };
22.  
23. class Kula : public Bryla
24. {
25.   private:
26.       int r;
27.   public:
28.       Kula(int r = 0)
29.       {
30.          this->r = r;
31.       }
32.  
33.       virtual double Objetosc()
34.       {
35.           return 3.14 * r * r * r * 4 / 3.0;
36.       }
37. };
38.  
39. class Szescian : public Bryla
40. {
41.   private:
42.       int a;
43.   public:
44.       Szescian(int a = 0)
45.       {
46.           this->a = a;
47.       }
48.  
49.       virtual double Objetosc()
50.       {
51.           return a * a * a;
52.       }
53. };
54.  
55. int main()
56. {
57.     vector<Bryla *> vectorek;
58.     vectorek.push_back(new Kula(5));
59.     vectorek.push_back(new Szescian(6));
60.     vectorek.push_back(new Kula(7));
61.     vectorek.push_back(new Szescian(1));
62.  
63.     int sum = 0;
64.     for(int i = 0; i < vectorek.size(); ++i)
65.     {
66.         sum += vectorek[i]->Objetosc();
67.     }
68.     double average = static_cast<double> (sum) / vectorek.size();
69.  
70.     cout << "srednia objetosc = " << average << endl;
71.     int a = 5, b = 1;
72.  
73.     Swaper(a,b);
74.     cout << a << ", " << b;
75.  
76.     return 0;
77. }
78.