C / C++ / MFC

class AWobbley 
{
public:
	AWobbley() { printf("def ctor\n"); }
	AWobbley(const char *msg) : m_msg(msg) { printf("ctor\n");}
	AWobbley(const AWobbley &a) { printf("copy ctor\n"); m_msg = a.m_msg; }
	~AWobbley() { printf("dtor\n"); }
	void print() { printf("%s\n", m_msg); }
private:
	const char *m_msg;
};


void main( void )
{ 
	try
	{
		throw AWobbley("AGHRR!");
	}
	catch (AWobbley &e) 
	{
		printf("exception handler\n");
		e.print();
	}
}

class CXMLNode
{
public:
	char *p1;
	char *p2;
};

class AttributeInt 
{
	char * CXMLNode::*m_units;
public:
	AttributeInt(char * CXMLNode::*units = NULL) : m_units(units) {}

	void test()
	{
		if (m_units == NULL)
		{
			printf("m_units is NULL\n");
		}
		else
		{
			printf("m_units is not NULL\n");
		}
	}
};


void main( void )
{ 
	AttributeInt a;
	a.test();

	AttributeInt b(&CXMLNode::p1);
	b.test();
}