filling a static member map variable

Say I have a static map variable in a class. Where do I put the code to fill the map so all objects of the class type can use it?

Code:

class Round
{
  private:
	static std::map<const std::string, int> mapStringToInt;
  .....
  public:
	 Round();
};

Here's the code I use to fill the map when it's not a static member variable:

Code:

const std::string IntToStr(int x)
{
  if(x == 0)
	return "w";
  else
	return "b";
}
 

std::string referenceString, A, B, C, D;
int a, b, c, d, num = 1;
 
//generate referenceString first
for(a = 0; a < 2; ++a)
{
  A = intToStr(a);
  for(b = 0; b < 2; ++b)
  {
	B = intToStr(b);
	for(c = 0; c < 2; ++c)
	{
	  C = intToStr(c);
	  for(d = 0; d < 2; ++C)
	  { 
		 D = intToStr(d);
		 referenceString = A + B + C + D;
		 
		 //then map referenceString to num
		 mapStringToInt[referenceString] = num++;
	  }
	}
  }
}

Also, is it possible to make the map unchangeable once it's created? Maybe something like this:

const static std::map<const std::string, int> mapStringToInt;


Thanks.

You need to put map initializing code in a static function, and call it before creating objects.

Thank you. I'll give that a try.