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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();
  30. };
  31.  
  32. class Counter {
  33.     int totalPassengers;
  34. public:
  35. 	Counter();
  36. 	void add(Bike* b);
  37. //	void add(Car* c);  
  38. //	void add(Catamaran* ca);
  39. //	void add(Seaplane* s);
  40. //	void add(Ferry* f);
  41. 	int total();
  42. };
  43.  
  44. }
  45.  
  46.  
  47.  
  48. using namespace oss;
  49.  
  50. Vehicle::~Vehicle(){};
  51.  
  52. Land_vehicle::Land_vehicle(){typeOfVehicle = "Land";}
  53. string Land_vehicle::type(){return typeOfVehicle;}
  54.  
  55. Bike::Bike(){numberOfPassengers = 1;}
  56. unsigned Bike::passengers(){return numberOfPassengers;}
  57.  
  58. Counter::Counter(){totalPassengers = 0;}
  59.  
  60. void Counter::add(Bike* b){
  61. cout <<"inside add bike"<<endl;
  62. totalPassengers += b->passengers();
  63. }
  64. //void Counter::add(Car c){totalPassengers += c.passengers();}
  65. //void Counter::add(Catamaran ca){totalPassengers += ca.passengers();}
  66. //void Counter::add(Seaplane s){totalPassengers += s.passengers();}
  67. //void Counter::add(Ferry f){totalPassengers += f.passengers();}
  68. int Counter::total(){return totalPassengers;}
  69.  
  70.  
  71. int main() {
  72.    Counter c;
  73.     Vehicle* v[] = {new Bike};
  74.  
  75.     size_t sz = sizeof v/sizeof v[0];
  76.     for (unsigned i = 0; i < sz; ++i) {
  77.     	if (dynamic_cast<Bike*>(v[i]))
  78.         	c.add(dynamic_cast<Bike*>(v[i]));
  79.     }
  80.  
  81.     std::cout << "Total: " << c.total() << " passengers!" << std::endl;
  82.  
  83.     for (unsigned i = 0; i < sz; ++i)
  84.         delete v[i];
  85.  
  86.     return 0;
  87. }
Success #stdin #stdout 0s 3464KB
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Standard input is empty
stdout
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inside add bike
Total: 1 passengers!
https://ideone.com/h5v6NR
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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