Thread: Adding nodes into linked list

I am having trouble insearting values into a linked list, program keeps crashing. What is wrong with this function?

Code:

void add_node()
{  
     Node *temp, *temp2;   
   
     cout << "Please enter a number";
     cin >> temp -> item;
     temp -> next = NULL; 

     if (head == NULL) 
             head = temp;         
          else
     { 
         temp2 = head; 
         while (temp2 -> next != NULL) 
             temp2 = temp2 -> next; 
         temp2 -> next = temp;    
  }
}

node looks like this:

Code:

struct Node
{
       int item;   
       Node *next; 
};

You should allocate a new node, because - as it is - you're using an unintialized pointer (temp)