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  1. #include <iostream>
  2. #include <string>
  3. #include <memory>
  4.  
  5. using namespace std;
  6.  
  7. // Base is an abstract base class.
  8. class Base {
  9. private:
  10.     string myName;   // Name of this person
  11. public:
  12.     Base(string name) : myName(name) {}
  13.     virtual ~Base() {}
  14.  
  15.     // A pure virtual function with a function body
  16.     virtual void hello() const  {
  17.         cout << "Hello, my name is " << myName << ".";
  18.     }
  19. };
  20.  
  21. class ServiceAgent : public Base {
  22. public:
  23.     ServiceAgent(string name) : Base(name) {}
  24.  
  25.     void hello() const override {
  26.         Base::hello();
  27.         cout << " I'm a customer service representative. How may I help you?" << endl;
  28.     }
  29. };
  30.  
  31. class Student : public Base {
  32. public:
  33.     enum category { FRESHMAN, SOPHOMORE, JUNIOR, SENIOR };
  34.     category personType;
  35.  
  36.     Student(string name, category pType) : Base(name), personType(pType) {}
  37.  
  38.     void hello() const override {
  39.         Base::hello();
  40.         cout << " " << enumToString(personType) << endl;
  41.     }
  42.  
  43.     string enumToString (category c) const
  44.     {
  45.         switch (c) {
  46.             case FRESHMAN:
  47.                 return "I'm a Freshman";
  48.             case SOPHOMORE:
  49.                 return "I'm a Sophomore";
  50.             case JUNIOR:
  51.                 return "I'm a Junior";
  52.             case SENIOR:
  53.                 return "I'm a Senior";
  54.         }
  55.         return "";
  56.     }
  57. };
  58.  
  59. class CSStudent : public Student {
  60. public:
  61.     CSStudent(string name, Student::category type) : Student(name, type) {}
  62.  
  63.     void hello() const override {
  64.         Student::hello();
  65.         cout << "I'm a computer science major." << endl;
  66.     }
  67. };
  68.  
  69. class BUSStudent : public Student {
  70. public :
  71.     BUSStudent(string name, Student::category type) : Student(name, type) {}
  72.  
  73.     void hello() const override {
  74.         Student::hello();
  75.         cout << "I'm a business major." << endl;
  76.     }
  77. };
  78.  
  79. int main() {
  80.  
  81.     std::unique_ptr<ServiceAgent> agentJack(new ServiceAgent("Jacqueline"));
  82.     std::unique_ptr<Student> studentJack(new Student("Jackson", Student::FRESHMAN));
  83.     std::unique_ptr<CSStudent> studentCSS(new CSStudent("Jack", Student::SOPHOMORE));
  84.     std::unique_ptr<BUSStudent> studentBus1(new BUSStudent("Jacky", Student::JUNIOR));
  85.     std::unique_ptr<BUSStudent> studentBus2(new BUSStudent("Joyce", Student::SENIOR));
  86.  
  87.     std::unique_ptr<Base> arr[] = { std::move(agentJack), std::move(studentJack), std::move(studentCSS), std::move(studentBus1), std::move(studentBus2) };
  88.  
  89.     for (auto &var : arr)
  90.     {
  91. 		var->hello();
  92. 		cout << "-----" << endl;
  93.     }
  94.  
  95.     return 0;
  96. }
Success #stdin #stdout 0s 15240KB
comments (?)
stdin 
Standard input is empty
stdout 
Hello, my name is Jacqueline. I'm a customer service representative. How may I help you?
-----
Hello, my name is Jackson. I'm a Freshman
-----
Hello, my name is Jack. I'm a Sophomore
I'm a computer science major.
-----
Hello, my name is Jacky. I'm a Junior
I'm a business major.
-----
Hello, my name is Joyce. I'm a Senior
I'm a business major.
-----
https://ideone.com/hI4XQs
language:
C++ (gcc 8.3)
created:
5 years ago
visibility:
public

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