Шпаргалка: Реализация списка

{if (BegP==NULL)

{MakeNewList(); return 0;}

int Quant;

cout<<endl<<"Input quantity of elements: ";

do

{cin>>Quant;

if (Quant<1)

cout<<endl<<"Error! Try again: ";

}

while (Quant<1);

for (int i=0; i<Quant; i++)

{cout<<endl<<"Input digit: ";

int Digit;

cin>>Digit;

PList=new List(Digit);

List *PList1=BegP->LPrev;

if (PList1==BegP)

{BegP->LNext=PList;

BegP->LPrev=PList;

PList->LPrev=BegP;

PList->LNext=BegP;

PList1=NULL; PList=NULL;}

else

{BegP->LPrev=PList;

PList->LNext=BegP;

PList->LPrev=PList1;

PList1->LNext=PList;

PList=NULL; PList1=NULL;}

}