liste

#include <iostream>
#include <fstream>
using namespace std;
ifstream f("date.in");

struct nod
{
    int inf;
    nod *urm;
} *prim, *ultim ;

void crearel_vida(nod *&prim, nod *& ultim )
{
    prim=ultim=NULL;
}

void adaugarefin (nod *&prim, nod *& ultim, int v)
{
    nod *nou;
    nou=new nod;
    nou->inf=v;
    nou->urm=NULL;
    if(prim==NULL)prim=ultim=nou;
    else
        {
         ultim->urm=nou;
          ultim=nou;
        }
}

void parcurgere (nod *prim, nod *ultim)
{
    nod *p;
    p=prim;
    while(p!=NULL)
    {
        cout<<p->inf<<' ';
        p=p->urm;
    }
}

float ma(nod *prim, nod* ultim)
{
    float s=0;
    int n=0;
    nod *p;
    p=prim;
    while(p!=NULL)
    {
        s+=p->inf;
        n++;
        p=p->urm;
    }
    return s/n;
}

int main()
{
   crearel_vida(prim,ultim);
   int n,x;
   f>>n;
   for(int i=1;i<=n;i++)
   {
       f>>x;
       adaugarefin(prim,ultim,x);
   }
   cout<<"Lista"<<'\n';
   parcurgere(prim,ultim);
   cout<<'\n';
   cout<<"Media aritmetica: "<<ma(prim,ultim)<<'\n';

    return 0;
}