From: rob DOT beattie AT net DOT ntl DOT com DOT uk (rob beattie)
Newsgroups: comp.os.msdos.djgpp
Subject: problem with function pointers
Date: Thu, 21 Oct 1999 20:35:46 GMT
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To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Reply-To: djgpp AT delorie DOT com

Hi,
I  attempted to compile and run the following piece of code using the
DJGPP compiler and have come up against a baffling problem.

 #include<iostream.h>

class myclass
{
    public:
	myclass():normal(1)
	{ 
	  stat++;
	  cout<<"Object"<<stat<<"created\n";
	}

	void shownormal() 
	{
	  cout<<"normal="<<normal<<"\n";  
	}

	void showpfunc() 
	{
	  cout<<"normal as reprted by pfunc="<<normal<<"\n";  
	}

	void showstatic() 
	{
	  cout<<"static="<<stat<<"\n";
	}

	static void membstatic() 
	{
	  cout<<"static="<<stat<<"\n";
	}


    	~myclass()
	{
	 stat--;
	 cout<<"In the destructor stat="<<stat<<"\n";
	}

     private:
	int normal;
	static int stat;
};

int myclass::stat=0;



int main()
{
  
  void (myclass::*pfunc)()=0;
  pfunc=myclass::showpfunc;


  myclass one;

  one.shownormal();
  one.membstatic();
  one.*pfunc();

  myclass two;

  two.shownormal();
  myclass::membstatic();
  two.*pfunc();
  
  myclass three;

  three.shownormal();
  three.membstatic();
  three.*pfunc();


return(0);
}
 

Sorry about the lack of comments, but I was basically creating three
myclass objects and accessing their static members and functions as
well as practising using pointers to functions. 
The compiler reports the warning  " in int main.... assuming & on
'myclass::showpfunc()' ". Could others have a go at compiling the
above code(with DJGPP) and see if it works because I have spent ages
trying to debug it and am nowhere near finding an answer. Is it a
compiler problem?