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  1. #include <iostream>
  2. #include <vector>
  3. using namespace std;
  4.  
  5. using namespace std;
  6.  
  7. namespace oss{
  8.  
  9. class Vehicle
  10. {
  11. public:
  12.     virtual string type() = 0;
  13.     virtual unsigned passengers() = 0;
  14.     virtual ~Vehicle();
  15. };
  16.  
  17. class Land_vehicle : public Vehicle{
  18. protected:
  19.     string typeOfVehicle;
  20.     unsigned numberOfPassengers;
  21. public:
  22.     Land_vehicle();
  23.     string type();
  24. };
  25.  
  26. class Bike : public Land_vehicle{
  27. public:
  28.     Bike();
  29.     unsigned passengers() override;
  30. };
  31.  
  32. class Counter {
  33.     int totalPassengers;
  34. public:
  35. 	Counter();
  36. 	void add(Vehicle* b);
  37. 	int total();
  38. };
  39.  
  40. }
  41.  
  42.  
  43.  
  44. using namespace oss;
  45.  
  46. Vehicle::~Vehicle(){};
  47.  
  48. Land_vehicle::Land_vehicle(){typeOfVehicle = "Land";}
  49. string Land_vehicle::type(){return typeOfVehicle;}
  50.  
  51. Bike::Bike(){numberOfPassengers = 1;}
  52. unsigned Bike::passengers(){return numberOfPassengers;}
  53.  
  54. Counter::Counter(){totalPassengers = 0;}
  55.  
  56. void Counter::add(Vehicle* b){
  57. 	totalPassengers += b->passengers();
  58. }
  59. int Counter::total(){return totalPassengers;}
  60.  
  61.  
  62. int main() {
  63.    Counter c;
  64.     Vehicle* v[] = {new Bike};
  65.  
  66.     size_t sz = sizeof v/sizeof v[0];
  67.     for (unsigned i = 0; i < sz; ++i) {
  68.        	c.add(v[i]);
  69.     }
  70.  
  71.     std::cout << "Total: " << c.total() << " passengers!" << std::endl;
  72.  
  73.     for (unsigned i = 0; i < sz; ++i)
  74.         delete v[i];
  75.  
  76.     return 0;
  77. }
Success #stdin #stdout 0s 3416KB
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stdin
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Standard input is empty
stdout
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Total: 1 passengers!
https://ideone.com/ol83IG
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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