problem with static member

**agarwaga** · 02-24-2006

Code:

#include <iostream.h>

class hello{
  private:
    int a;

  public:
    static int val;
};

void main(){
  cout<<"gaurav "<<hello.val;
}

this code doesn't compile, it says improper use of typedef 'hello' in function main()

i am using borland c++ compiler

**hk_mp5kpdw** · 02-24-2006

Code:

#include <iostream>

class hello{
  private:
    int a;

  public:
    static int val;
};

int hello::val;

int main(){
  std::cout<<"gaurav "<<hello.val;
}

**LuckY** · 02-24-2006

You must use the scope resolution operator (::) instead of the dot operator, which is used to reference members of an object.

Code:

cout << "gaurav " << hello::val;

Also, you must declare static member variables as previously mentioned.

**ZuK** · 02-24-2006

Try it this way.

Code:

#include <iostream>    // new header

using namespace std;

class hello{
  private:
    int a;
  public:
    static int val;
};

int hello::val = 12;  // define an initialize it

int main(){          // main must return int
  cout<<"gaurav "<< hello::val;  // scope resolution op needed
}

Kurt

**7stud** · 02-24-2006

You must use the scope resolution operator (::) instead of the dot operator, which is used to reference members of an object.

Both the dot operator and the scope resolution operator work for static members with VC++6. But if you don't initialize the static member, then you get errors:

Code:

int hello:val;  //intializes to 0
int hello::val = 12;

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