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155 |
/********************/
/* ListaCirculara.h */
/********************/
#ifndef LISTA_CIRCULARA
#define LISTA_CIRCULARA
struct nod
{
nod *next;
int value;
};
class ListaCirculara
{
public:
nod *HEAD;
ListaCirculara();
void adaugaNod(int val);
void stergeNodPrim();
void stergeNodUltim();
void stergeNodDupa(nod *dupa);
void stergeNod(int val);
void afiseaza();
};
#endif
/**********************/
/* ListaCirculara.cpp */
/**********************/
#include "ListaCirculara.h"
#include <iostream>
using namespace std;
ListaCirculara::ListaCirculara(){ HEAD = NULL; }
void ListaCirculara::stergeNodPrim()
{
if(HEAD == NULL)
cout << "Lista goala!" << endl;
else if(HEAD != NULL && HEAD -> next == HEAD)
HEAD = NULL;
else
{
nod *iter = HEAD;
while(iter -> next != HEAD)
iter = iter -> next;
iter -> next = HEAD -> next;
HEAD = HEAD -> next;
}
}
void ListaCirculara::stergeNodUltim()
{
if(HEAD == NULL)
cout << "Lista goala!" << endl;
else if(HEAD != NULL && HEAD -> next == HEAD)
HEAD = NULL;
else
{
nod *iter = HEAD;
while(iter -> next -> next != HEAD)
iter = iter -> next;
iter -> next = HEAD;
}
}
void ListaCirculara::adaugaNod(int val)
{
nod *nou = new nod();
nou -> value = val;
if(HEAD == NULL)
{
nou -> next = nou;
HEAD = nou;
}
else
{
nou -> next = HEAD;
nod *iter = HEAD;
while(iter -> next != HEAD)
iter = iter -> next;
iter -> next = nou;
}
}
void ListaCirculara::afiseaza()
{
nod *iter = HEAD;
if(HEAD == NULL)
cout << "Lista este goala!" << endl;
else
do
{
cout << iter -> value << " ";
iter = iter -> next;
}while(iter != HEAD);
}
void ListaCirculara::stergeNodDupa(nod *dupa)
{
if(HEAD == NULL)
cout << "Lista goala!" << endl;
else if(HEAD != NULL && HEAD -> next == HEAD)
if(HEAD -> value == dupa -> value)
stergeNodPrim();
else
HEAD = NULL;
else
{
dupa -> next = dupa -> next -> next;
}
}
void ListaCirculara::stergeNod(int val)
{
if(HEAD == NULL)
cout << "Lista goala!" << endl;
else if(HEAD != NULL && HEAD -> next == HEAD)
if(HEAD -> value == val)
stergeNodPrim();
else
HEAD = NULL;
else
{
nod *iter = HEAD;
while(iter -> next != HEAD)
{
if(iter -> next -> value == val)
{
stergeNodDupa(iter);
break;
}
else
iter = iter -> next;
}
}
}
|
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