http://www.reddit.com/r/learnprogramming/comments/2of8sn/c_help_my_linked_list_keeps_crashing/

linked_list_fix.cc

#include <iostream>
#include <string>

class Node
{
	friend class LinkedList;
private:
	Node* _next;
	std::string _data;
public:
	Node(void)
	{
		_next = NULL;
	}
	Node(std::string data)
	{
		_next = NULL;
		_data = data;
	}
	Node(std::string data, Node* next)
	{
		_next = next;
		_data = data;
	}
	inline std::string getData(void)
	{
		return _data;
	}
	inline Node* getNext(void)
	{
		return _next;
	}
};

class LinkedList
{
private:
	Node* pHead, *pTail;
public:
	LinkedList(void);
	LinkedList(std::string);
	~LinkedList(void);
	void add();
	void print(void);
	//void clear(void);
};

LinkedList::LinkedList()
{
	pTail = pHead = NULL;
}

LinkedList::LinkedList(std::string data)
{
	pHead = new Node(data);
	pTail = NULL;
}

LinkedList::~LinkedList()
{
	//clear();
}

void LinkedList::add()
{
	std::string strin;
	std::cout << "Tell me the player's name: "; std::cin >> strin;
	if (pHead == nullptr)
	{
		pTail = pHead = new Node(strin);
	}
	else
	{
		pTail = pTail->_next = new Node(strin);
	}
};



void LinkedList::print()
{
	Node* toPrint = pHead;
	while (toPrint != nullptr)
	{
		std::cout << toPrint->getData() << " is in the lobby" << std::endl;
		toPrint = toPrint->getNext();
	}
}

int main()
{
	LinkedList myLobby;
	int choice;
	do
	{
		std::cout << "What you wanna do: ";
		std::cin >> choice;
		switch (choice)
		{
		case 0:
			std::cout << "bye!" << std::endl; break;
		case 1:
			 myLobby.add(); break;
		case 2:
			myLobby.print(); break;
		}
	} while (choice != 0);

	std::cin.get();
	return 0;
}

linked_list_memory.cc

#include <iostream>
#include <string>

template<typename T>
class LinkedList {
  private:
    struct Node;
    Node *head, *tail;
  public:
    LinkedList() : head(new Node), tail(head) {}
    ~LinkedList() {
      Node *node = head;
      while (node != nullptr) {
        Node *temp = node;
        node = node->next;
        delete temp;
      }
    }
    void add();
    void print();
};

template<typename T>
struct LinkedList<T>::Node {
  T value;
  Node *next = nullptr;
};

template<typename T>
void LinkedList<T>::add() {
  std::cout << "Tell me the player's name: ";
  std::cin >> tail->value;
  tail = tail->next = new Node;
}

template<typename T>
void LinkedList<T>::print() {
  for (Node *node = head;
       node->next != nullptr;
       node = node->next) {
    std::cout << node->value
              << " is in the lobby\n";
  }
}

int main() {
  LinkedList<std::string> myLobby;
  int choice;
  do {
    std::cout << "What you wanna do: ";
    std::cin >> choice;
    switch (choice) {
    case 0:
      std::cout << "bye!" << std::endl;
      break;
    case 1:
      myLobby.add();
      break;
    case 2:
      myLobby.print();
      break;
    }
  } while (choice != 0);
  return 0;
}