estructuras enlazadas

#include <iostream>

using namespace std;

struct node {
  char entry = 'a'; // valores por defecto
  node *next = nullptr;
};

int main()
{
    node *p0 = new node;
    node *p1 = new node;
    node *p2 = new node;

    p0->next = p1;
    p1->next = p2;

    for (node *p = p0; p != 0; p = p->next)
        cout << p->entry << ' ';
    cout << endl;

    p1->entry = 'b';
    p2->entry = 'c';

    for (node *p = p0; p != 0; p = p->next)
        cout << p->entry << ' ';
    cout << endl;

    return 0;
}