creare afisare lista circulara

#include <iostream>
#include <fstream>

using namespace std;

ifstream f("date.in");

struct nod
{
    int info;
    nod *urm;
};

nod *prim;

void creare()
{
    nod *nou,*ultim;
    int x;
    while (f>>x)
        if (prim==NULL)
        {
            prim=new nod;
            prim->info=x;
            ultim=prim;
        }
        else
        {
            nou=new nod;
            nou->info=x;
            ultim->urm=nou;
            ultim=nou;
        }
        ultim->urm=prim;
}

void parcurgere()
{
    nod *p=prim;
    do
    {
        cout<<p->info<<" ";
        p=p->urm;
    }while (p!=prim);
}

int main()
{
   creare();
   parcurgere();
    return 0;
}