Please review this C++ code and tell me how to fix it. For some reason it is not

Question

Please review this C++ code and tell me how to fix it. For some reason it is not compiling for me. It says that the errors are in the stream operators.

#include
using namespace std;

//EmailListClass declaration
class EmailListClass
{
private:
   //Declaration of a structure for the list
   struct ContactNode
   {
       string name; // the name value in this node
       string emailAddress; // the email adress value in this node
       struct ContactNode *next; //Struct ContactNode pointer to the next node

   };

   ContactNode *head; //Pointer to the head of the ContactList head
     
public:
   //Constructor initializes the head pointer to NULL in order to establish an empty linked list.
   EmailListClass()
   {head = NULL;}

   //Linked list operations
   void appendNode(string, string );
   void displayList() const;

};

void EmailListClass::appendNode(string m, string n)
{
   ContactNode *newNode; //It points to a new node
   ContactNode *nodePtr; //To move through the list
  
   //Allocate new nodes, store information, and the next pointer points to NULL
   newNode = new ContactNode;
   newNode->name = m;
   newNode->emailAddress=n;
   newNode->next = NULL;

   if (!head)
       head = newNode;
   else
   {
       nodePtr=head;

       while (nodePtr->next)
           nodePtr=nodePtr->next;

       nodePtr->next = newNode;
   }
}

void EmailListClass::displayList() const
{
   ContactNode *nodePtr; // To move though the list

  
   nodePtr = head;

   while(nodePtr)
   {
       cout << nodePtr->name<< endl;
       cout << nodePtr->emailAddress<

       nodePtr = nodePtr->next;
   }
}

//Function main  
int main()
{
  
   //Define a EmailListClass object and other variables
   EmailListClass list;
   string name, email;
   char input;

   //While loop  
   while(true){
cout << "Do you want to enter anything else?(y or n)?";
cin >> input;
if( input == 'n' || input == 'N')
   {
break;
}
else
   {
cout << "Enter Name: ";
cin >> name;
             
       cout << "Enter email address:";
cin >> email;
   }

   //Append information to the list
   list.appendNode(name, email);

   //Display the information in the list
   list.displayList();
      
   return 0;
  
}

Explanation / Answer

#include <iostream>
using namespace std;

//EmailListClass declaration
class EmailListClass
{
private:
//Declaration of a structure for the list
struct ContactNode
{
string name; // the name value in this node
string emailAddress; // the email adress value in this node
struct ContactNode *next; //Struct ContactNode pointer to the next node

};

ContactNode *head; //Pointer to the head of the ContactList head

public:
//Constructor initializes the head pointer to NULL in order to establish an empty linked list.
EmailListClass()
{head = NULL;}

//Linked list operations
void appendNode(string, string );
void displayList() const;

};

void EmailListClass::appendNode(string m, string n)
{
ContactNode *newNode; //It points to a new node
ContactNode *nodePtr; //To move through the list
  
//Allocate new nodes, store information, and the next pointer points to NULL
newNode = new ContactNode;
newNode->name = m;
newNode->emailAddress=n;
newNode->next = NULL;

if (!head)
head = newNode;
else
{
nodePtr=head;

while (nodePtr->next)
nodePtr=nodePtr->next;

nodePtr->next = newNode;
}
}

void EmailListClass::displayList() const
{
ContactNode *nodePtr; // To move though the list

  
nodePtr = head;

while(nodePtr)
{
cout << nodePtr->name<< endl;
cout << nodePtr->emailAddress<<endl;

nodePtr = nodePtr->next;
}
}

//Function main
int main()
{
  
//Define a EmailListClass object and other variables
EmailListClass list;
string name, email;
char input;

//While loop
while(true){
cout << "Do you want to enter anything else?(y or n)?";
cin >> input;
if( input == 'n' || input == 'N')
{
break;
}
else
{
cout << "Enter Name: ";
cin >> name;

cout << "Enter email address:";
cin >> email;
}

//Append information to the list
list.appendNode(name, email);

//Display the information in the list
list.displayList();
  
return 0;
  
}

Compilation error

stdin

Standard input is empty

compilation info

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