C / C++ / MFC

static CMyClass ::Counter=0;<br />
<br />
initilaize a static member  to zero;<br />
// class constructor<br />
CMyClass()<br />
{<br />
   CMyClass ::counter++;<br />
<br />
  if(CMyClass ::Counter>2)<br />
  {<br />
    // call the destructor<br />
   this->~CMyClass()<br />
   return;<br />
 }<br />
 // do rest of the intializtion <br />
// in constructor if the no of objects <br />
// are less than 2<br />
<br />
}<br />
<br />
~CMyClass()<br />
{<br />
   if(CMyClass ::Counter>2)<br />
    {CMyClass ::counter--;<br />
    return;<br />
    }<br />
    CMyClass ::counter--;<br />
   //deinitialize the the memory which was intialized in     //constructor<br />
}<br />

class CMyClass{
public:
static int i;
CMyClass()
{ 
    ++i;
    if(i>2)
    { 
      printf("cannot create more than 2 instances");
      ~CMyClass();
    }
}
~CMyClass()
{ 
  --i;
}
};
void main()
{
   CMyClass *pCls1 = new CMyClass();
   CMyClass *pCls2 = new CMyClass();
   CMyClass *pCls3 = new CMyClass();
      //Here I need to give an error in this third line.
      //How it is possiable. what kind of class it is  
}

CMyClass class1;<br />
CMyClass class2;<br />
CMyClass class3;

sunit5 wrote:

ForumVisual C++
Subject:Re: Can I restrict a class not to have more than 2 objects?
Sender:sunit5
Date:2:52 7 Dec '05

static CMyClass ::Counter=0;

initilaize a static member to zero;
// class constructor
CMyClass()
{
CMyClass ::counter++;

if(CMyClass ::Counter>2)
{
// call the destructor
this->~CMyClass()
return;
}

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

sunit5 wrote:

CMyClass()
{
CMyClass ::counter++;

if(CMyClass ::Counter>2)
{
// call the destructor
this->~CMyClass()
return;
}

#include<iostream.h>

class Classa
{
public:
	Classa()
	{
		cout<<"in const"<<endl;
		this->~Classa();
	}

	void print()
	{
		cout<<"abc"<<endl;
		
	}

	~Classa()
	{
		cout<<"In Dest"<<endl;
	}
};

void main()
{
	Classa a;

	a.print();

}

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

class CMyClass<br />
{<br />
public:<br />
   static CMyClass* GetNewInstance();<br />
<br />
protected:<br />
   CMyClass();<br />
   ~CMyClass();<br />
<br />
private:<br />
   static int m_iCounter;<br />
}

int CMyClass::m_iCounter = 0;<br />
CMyClass* CMyClass::GetNewInstance()<br />
{<br />
   if (m_iCounter<2)<br />
   {<br />
      m_iCounter++;<br />
      return new CMyClass;<br />
   }<br />
   return NULL;<br />
}

void CMyClass::Destroy()<br />
{<br />
   m_iCounter--;<br />
   delete this;<br />
}

"Take only what you need and leave the land as you found it." - Native American Proverb

usha_dolly wrote:

But actually my problem is when i click on my project ".exe" file

then it should automatically installed , rather then going to

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow