// static_data_members.cppclass BufferedOutput{public:  // Return number of bytes written by any object of this class.  short BytesWritten()  {   return bytecount;  }  // Reset the counter.  static void ResetCount()  {   bytecount = 0;  }  // Static member declaration.  static long bytecount;};// Define bytecount in file scope.long BufferedOutput::bytecount;int main(){}

long nBytes = BufferedOutput::bytecount;