#include <iostream>
 
class Base {
public:
  Base() {
    std::cout << "Base()" << std::endl;
  }
  virtual ~Base() {
    std::cout << "~Base()" << std::endl;
  }
};
 
class Derived : public Base {
public:
  Derived() {
    std::cout << "Derived()" << std::endl;
  }
  ~Derived() {
    std::cout << "~Derived()" << std::endl;
  }
};
 
int main()
{
  std::cout << "{\n  Derived a;\n}" << std::endl;
 
  // 1
  {
    Derived a;
  }
 
  std::cout << "------------------------" << std::endl;
  std::cout << "{\n  Derived ary[2];\n}" << std::endl;
 
  // 2
  {
    Derived ary[2];
  }
 
  std::cout << "------------------------" << std::endl;
  std::cout << "{\n  Base* p = new Derived;" << std::endl;
  std::cout << "  delete p;\n}" << std::endl;
 
  // 3
  {
    Base* p = new Derived;
    delete p;
  }
 
  std::cout << "------------------------" << std::endl;
  std::cout << "{\n  Base* ap = new Derived[2];" << std::endl;
  std::cout << "  delete[] ap;\n}" << std::endl;
 
  // 4
  {
    Base* ap = new Derived[2];
    delete[] ap;
  }
}
 

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