두 질서 체인 테이블의 귀속과 비귀속을 합병하다

node * MergeRecursive(node *head1, node *head2)
{
node *head = NULL;  
if (head1 == NULL)
{
 return head2;
}
 if (head2 == NUL)
 {
 return head1;
 }
if ( head1->data < head2->data )
{
 head = head1 ;
 head->next = MergeRecursive(head1->next,head2);
}
else
 {
 head = head2 ;
 head->next = MergeRecursive(head1,head2->next);
 }
   
 return head ;
 }

void mergeList(PTRNODE &res, PTRNODE list1, PTRNODE list2)
{
    PTRNODE curNode = NULL;
    
    if(list1 == NULL)
        res = list2;
    else if(list2 == NULL)
        res = list1;
    else
    {
        if(list1->value <= list2->value)
        {
            res = list1;  
            list1 = list1->next;
        }
        else
        {
            res = list2;
            list2 = list2->next;
        }
        
        curNode = res;
        
        while(list1 != NULL && list2 != NULL)
        {
            if(list1->value <= list2->value)
            {
                curNode->next = list1;
                list1 = list1->next;
            }
            else
            {
                curNode->next = list2;             
                list2 = list2->next;
            }
            
            curNode = curNode->next;
        }
        
        if(list1 == NULL)
            curNode->next = list2;
        else
            curNode->next = list1;
    }
}