I want to build a singly linked list
Issues an error:
Using an uninitialized memory p;
Using an uninitialized local variable p;
Could you tell me how to modify should I?

 # include 
# include 
using namespace std; 

Struct Node 
{
Double data; 
Node * next; 
}; 

Void CreateList (Node * & amp; The head) 
{
The Node * s, * p; 
S=new Node; 
Cin & gt;> S - & gt; The data; 

While (s - & gt; The data!=0) 
{
If (head==NULL) 
{
The head=s; 
} 
The else 
{
P - & gt; Next=s; 
P=s; 
S=new Node; 
Cin & gt;> S - & gt; The data; 
} 
} 
P - & gt; Next=NULL; 
The delete s; 
return; 
} 

Void ShowNode (Node * head) 
{
While (the head) 
{
Cout & lt; The head=head - & gt; Next; 
} 
Cout & lt; } 
Int main () 
{
The head Node *=NULL; 
CreateList (head); 
ShowNode (head); 

}