H SFCLSH class x I int d static int nCount public X(int a=0): d(a) n Count + ~×0 n Count void Set(int a) d=a;} int Geto return d static int Counto I return nCount int X,. nCount =0// SFCLS.H class X { int d; static int nCount; public: X(int a = 0) : d(a) { nCount ++; } ~X() { nCount --; } void Set(int a) { d = a; } int Get() { return d; } static int Count() { return nCount; } }; int X :: nCount = 0;