foo.cc: In constructor 'BigInt::BigInt(int)':
foo.cc:30:93: warning: variable 'ptrPriorNode' set but not used [-Wunused-but-set-variable]
   30 |                 DigitNode *ptrHeadNode = NULL, *ptrNewNode = NULL, *ptrCurrentNode = NULL, *ptrPriorNode = NULL;
      |                                                                                             ^~~~~~~~~~~~
foo.cc: In member function 'BigInt BigInt::IntegerToBigInt(int)':
foo.cc:331:93: warning: variable 'ptrPriorNode' set but not used [-Wunused-but-set-variable]
  331 |                 DigitNode *ptrHeadNode = NULL, *ptrNewNode = NULL, *ptrCurrentNode = NULL, *ptrPriorNode = NULL;
      |                                                                                             ^~~~~~~~~~~~

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