copyconstructorsfall20xx-資料下載頁
2025-10-03 16:06本頁面
【導(dǎo)讀】Destructor.Copyconstructorisa“constructor”。type.Examples. Fractionf3=f2;//CopyConst.//operator.(1)parameter,theoriginalobject.Fraction(constFraction&f);Timer(consttimer&t);newobjectlocation.Fractionf1(3,4);Fraction.notsufficient.Why?Becauseadefaultor. pointervalue(Address).weneedadeepcopy.DeepCopy. maxsize=;currentsize=;entryList=newEntry[];entryList[i]=[i];
【正文】 copy is not sufficient. ? Why? Because a default or shallow copy will only copy the pointer value (Address). Essentially both objects are pointing to the same item. Here we need a deep copy. Copy constructor ? Deep Copy Directory::Directory (const Directory amp。 d) { maxsize = 。 currentsize = 。 entryList = new Entry[]。 for (int i=0。 icurrentsize。 i++) entryList[i] = [i]。 }
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