Cannot insert and print out linked list - c++11

Question

I'm trying to create a simple linked list class. The program runs but it gives me wrong output. And it seems like linked list doesn't insert the new nodes as I want.
class Node
{
public:
std::string name;
Node *next;
};
class ProductName
{
private:
Node *head;
public:
ProductName()
{
head = NULL;
}
void insertNode(std::string input)
{
Node *temp;
temp = new Node;
temp->name = input;
temp->next = head;
head = temp;
}
void printOut()
{
Node *p;
p = head;
while (p->next != NULL)
{
std::cout << p->name << " ";
p = p->next;
}
}
};
int main()
{
ProductName object;
object.insertNode("Hello");
object.insertNode("world!");
object.printOut();
}
I expect the output is Hello world!, but it prints out a string of random character 005C4BA0
Edit: I forgot the pointer... It's p->name not p in the print function. However, now my result is world!.

Answer 1

First issue: your are always inserting into the beginning by replacing the head. If you expect your nodes to appears in order of insertion you should insert them in the end:
class ProductName
{
private:
Node *head;
Node *tail; // additional member to track the last node
public:
ProductName()
: head(nullptr), tail(nullptr)
{ }
void insertNode(std::string input)
{
Node *temp = new Node{ std::move(input), nullptr };
if (tail) {
tail->next = temp;
tail = temp;
} else {
head = tail = temp;
}
}
}
Second issue: your are printing all the elements that have next which means that the last element won't be printed.
void printOut()
{
Node *p = head;
// print while p != nullptr
// this also properly handles the empty list when head == nullptr
while (p)
{
std::cout << p->name << " ";
p = p->next;
}
}