When I tried to compile the above code I get error saying
“error: a storage class can only be specified for objects and functions”

Thanks a lot for the information

Regards!

thanks.

Can you please explain me what is the use of making a constructor static and when we need to do that ?

this error i am not getting
cStaticClass.getvalue();—-> i have written iike this i am not getting any error
cStaticClass is a object right so we can access member function or data of the claa by dot operator right.

y can u explain me in detail why i am not getting error

“Second, because all static members are instantiated only once, there is no way to have multiple copies of a pure static class (without cloning the class and renaming it).”

Static Classes can only have one instance derived from them (not an object, but a call to the static class itself.). Non-static classes can have an infinite number of instance derived from them (objects). Consider the example below; it’s an excerpt from a small Console app I wrote in Visual C++ Studio Express 2010:

———————————————————————————————-
// StaticClasses.cpp : main project file.

#include “stdafx.h”

using namespace System;

//Our pure static class can only contain static items …
static class StaticClass
{
private:
static int s_nValue;

public:
static int getValue(){return s_nValue++;}
};

class DynamicClass
{
private:
int m_nValue;

public:
DynamicClass(){m_nValue = 1;}
int getValue(){return m_nValue++;}
};

int StaticClass::s_nValue = 0;

int main(array ^args)
{
StaticClass cStaticClass;

//cStaticClass::getValue(); //Throws an exception, cannot access static methods and variables of an instantiated object of a static class

//in the tutorial the author said it can be instantiated once
//This is the reason why it holds on to its value even out of class scope.
//Here we have one copy, the static class
Console::WriteLine(L”StaticClass getValue call: ” + StaticClass::getValue());
Console::WriteLine(L”StaticClass getValue call: ” + StaticClass::getValue());

//in order to have multiple copies of the class, we need to create a non-static class, and instantiate at least 2 objects
DynamicClass cClass1;
DynamicClass cClass2;

//here 2 objects are being instantiated from a non-static class; here we have 2 copies, the same way we could use 2 different IDGenerators.
Console::WriteLine(L”Instantiated Object 1: ” + cClass1.getValue());
Console::WriteLine(L”Instantiated Object 2: ” + cClass2.getValue());

Console::WriteLine(L”Press any key to continue …”);
Console::ReadLine();
return 0;
}

———————————————————————————————-

“… if you needed two independent IDGenerators, this would not be possible.”

You can only derive one instance from a static class, and it is not an object.

I Hope this helps …

4lgor1thm

Did not understand the following….Can u explain?

“Second, because all static members are instantiated only once, there is no way to have multiple copies of a pure static class (without cloning the class and renaming it). For example, if you needed two independent IDGenerators, this would not be possible.”

What do u mean by two IDgenerators? Is it two classes?
Can some one explain the above paragraph in detail