[Question]

Guess the result of the following codes.

class Object

{

public:

  string name;

  Object(const string name)

  {

    this->name = name;

    cout << "Object::Object " << name << endl;

  }

  virtual ~Object()

  {

    cout << "Object::~Object " << name << endl;

  }

};

 

Object globalObject("globalObject");

 

int main()

{

  Object autoObject("autoObject");

  exit(0); // _exit(0); (1)

}

[Result]

At (1), in case of exit() is called

Object::Object globalObject

Object::Object autoObject

Object::~Object globalObject

At (1), in case of _exit() is called

Object::Object globalObject

Object::Object autoObject

[Conclusion]

When exit() or _exit() are called, the destructors of auto objects(located in stack) are not called.

exit() calls the desctuctors of static(global) objects, while _exit() does not do it.

exit() terminates the calling process after cleanup, while _exit() does immediately.

[Download]

exit_test.zip

For more information, http://msdn.microsoft.com/en-us/library/6wdz5232(VS.80).aspx