Sams Teach Yourself C++ in 21 Days

Advanced Inheritance 577

16

238: return;

239: }

240:

241: // if this goes after this one and before the next

242: // then insert it here, otherwise get the next

243: pNext = pCurrent->itsNext;

244: Next = pNext->itsPart->GetPartNumber();

245: if (Next > New)

246: {

247: pCurrent->itsNext = pNode;

248: pNode->itsNext = pNext;

249: return;

250: }

251: pCurrent = pNext;

252: }

253: }

254:

255: class PartsCatalog : private PartsList

256: {

257: public:

258: void Insert(Part *);

259: int Exists(int PartNumber);

260: Part * Get(int PartNumber);

261: operator+(const PartsCatalog &);

262: void ShowAll() { Iterate(Part::Display); }

263: private:

264: };

265:

266: void PartsCatalog::Insert(Part * newPart)

267: {

268: int partNumber = newPart->GetPartNumber();

269: int offset;

270:

271: if (!Find(offset, partNumber))

272: PartsList::Insert(newPart);

273: else

274: {

275: cout << partNumber << “ was the “;

276: switch (offset)

277: {

278: case 0: cout << “first “; break;

279: case 1: cout << “second “; break;

280: case 2: cout << “third “; break;

281: default: cout << offset+1 << “th “;

282: }

283: cout << “entry. Rejected!” << endl;

284: }

285: }

286:

287: int PartsCatalog::Exists(int PartNumber)

288: {

289: int offset;

LISTING16.7 continued