C / C++ / MFC

struct s {
  // unsigned* p;
  virtual void msg() { cout<<"c::msg"<<endl; }
  int n;
  double d;
};

// Disable padding.
#pragma pack(1)

class cc {
public:
  virtual void msg() { cout<<"c::msg"<<endl; }
private:
  int n;
  double d;
};

Chris Meech wrote:

I trying to see if I can code the calls to CallMeFirst and CallMeLast just once and not have to "recode" them for every application.

Mark Salsbery
Microsoft MVP - Visual C++

{
  CallMeFirst();
...
  SomeClass   ObjectA;
...
  ObjectA.DoSomeStuff();
...
  CallMeLast();
}

{
  CallMeFirst();
...
  {
    SomeClass   ObjectA;
...
    ObjectA.DoSomeStuff();
...
  }
  CallMeLast();
}

void CallMeFirst()
{
}

void CallMeLast()
{
}

class CommonBaseClass
{
	static int RefCount;

protected:
	CommonBaseClass()
	{
		if (0 == RefCount)
			CallMeFirst();
		RefCount++;
	}

	~CommonBaseClass()
	{
		RefCount--;
		if (0 == RefCount)
			CallMeLast();
	}
};
int CommonBaseClass::RefCount = 0;

class SomeClass : public CommonBaseClass
{
public:
	SomeClass()  {}
	~SomeClass()  {}
};

Mark Salsbery
Microsoft MVP - Visual C++

float distance_between(struct place * a, struct place * b)
{
	float calculated_distance = 0.0;
	float ptrs here.....
	math here....... (calculate the distance)
	return calculated_distance;
//	printf( "Result is: %9.2f \n", part8 );
}

Nemanja Trifunovic wrote:

it will be exactly the same as if you put the portNumber declaration before the loop. Compilers are pretty smart these days

Bram van Kampen wrote:

Sorry, this is incorrect.

Bram van Kampen wrote:

If you put portNumber outside the loop, it's scope will be larger.