Thread: single linked list with head and tail pointers

I am trying to convert step's into code. I am specily stuck with function

Code:

#include<stdio.h>
#include<stdint.h>
#include<stdlib.h>


struct node 
{
    int data;
    struct node * next;
};




 struct node *add (struct node *head, struct node * tail, int value  )
 {
	struct node * current = malloc(sizeof(*current));
     
      if ( current != NULL )
      {
            current -> data = value;
            current -> next = tail;
            
            if( head == NULL )
            {
                head = current ;     
            }
            
            else 
                
            {
                  tail = current ;
                        
            }
      }
	  
	  return current;


 }
int main ()
{ 
   struct node * head;
   struct node * tail;
   struct node * temp;
   
   temp = add ( head, tail, 3  );
  
   return 0;
}