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Tip of the Day
Home » Tip Bank » C++
Language: C++
Expertise: All
Mar 30, 1999

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Initializing const static Data Members

The C++ Standard now allows initialization of const static data members of an integral type inside their class.
 
#include <string>
class Buff
{
private:
  static const int MAX = 512; //definition
  static const char flag = 'a'; //also a defintion
  static const std::string msg; //non-integral type; must be defined outside the class body
public:
//..
};
const std::string Buff::msg = "hello";
The initialization inside the class body also defines the data member, so it shouldn't be defined outside the class, as opposed const static data members of non-integral types, which have to be defined outside the class body.
Danny Kalev
 
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