uninitialized references

[Null]

Hello, I have a little problem with classes. Code:

class CC
{
public:  
int &a;  


CC(int &_a) 
  { 
     a=_a;
  }
void print()
  {
    cout <<a<<" ";
  }

};



int main()
{
int i=10;    
CC cc(i);

cc.print(); // print 10
i=11;       // i has changed so cc.a must change its value too
cc.print(); // should print 11

getchar();
}

So basically I want to make CC::a always equal to i but I'm getting error:

D:\C++\sudas\test.cpp uninitialized reference member `CC::a'

How can I fix this?
Thanks for help.

[z05DSL3A]

Initialize a within a member initializer list:

CC(int &_a) 
:a(_a)
{ 
}

[Null]

Thanks!