Static Member Functions 2

• A static method that does not access any (static) class data is effectively a stand-alone function whose scope is restricted to the class scope.
• Method NewArray is a "helper" function that encapsulates a repetitive housekeeping task into one place where it can be maintained.
• Makes all of the other method implementations that use dynamic memory easier to read, and it means that the policy for handling a failed allocation can be changed in one place while ensuring consistent adherence to the policy.

class IntArray
{
private:
  static int* NewArray (size_t sz);
  ...
} ;

int* IntArray::NewArray (size_t sz)
{
  int * ptr = new(std::nothrow) int [sz];
  if (ptr == 0)
  {
    std::cerr << "** Allocation failure in class IntArray\n";
    exit (1);  // replaceable handler code
  }
  return ptr;
}