HTML Node, C++ (gcc)

Language: Layout:

/**
Samuel Ugochukwu Nwutobo
sammycageagle@gmail.com
23 July 2019
HTML Node
**/

#include <iostream>

struct Node
{
 Node(std::string n) : id(n){}
 std::string id;
 Node* parent;
 Node* next;
 Node* prev;
 Node* end;
};

Node *createElement(std::string id)
{
 Node* e = new Node(id);
 e->parent = e;

e->end = new Node(id + "-end");
 e->end->parent = e;

e->end->prev = e;
 e->end->next = e;

e->prev = e->end;
 e->next = e->end;

return e;
}

enum InsertMode
{
 EBeforeBegin,
 EAfterBegin,
 EBeforeEnd,
 EAfterEnd
};

void insertElement(Node *head, Node *tail, Node* target, InsertMode mode)
{

head->prev = tail;
  tail->next = head;

switch(mode)
 {
  case EBeforeBegin:
  {
   Node* targetPrev = target->prev;

targetPrev->next = head;
   head->prev = targetPrev;

target->prev = tail;
   tail->next = target;
   break;
  }
  case EAfterBegin:
  {
   Node* targetNext = target->next;

target->next = head;
   head->prev = target;

targetNext->prev = tail;
   tail->next = targetNext;
   break;
  }
  case EBeforeEnd:
  {
   target = target->end;
   Node* targetPrev = target->prev;

targetPrev->next = head;
   head->prev = targetPrev;

target->prev = tail;
   tail->next = target;
   break;
  }
  case EAfterEnd:
  {
   target = target->end;
   Node* targetNext = target->next;

target->next = head;
   head->prev = target;

targetNext->prev = tail;
   tail->next = targetNext;
   break;
  }
 }
}

void insertElement(Node* e, Node* target, InsertMode mode)
{
 insertElement(e, e->prev, target, mode);
}

void appendElement(Node* e, Node* target)
{
 insertElement(e, e->prev, target, EBeforeEnd);
}

int main()
{
 Node* body = createElement("body");
 Node* div1 = createElement("div1");
 Node* div2 = createElement("div2");
 Node* div3 = createElement("div3");
 Node* div4 = createElement("div4");
 Node* div5 = createElement("div5");

insertElement(div5, div1, EBeforeEnd);
  insertElement(div1, div4, EBeforeEnd);
  insertElement(div2, div1, EBeforeBegin);

insertElement(div4, body, EBeforeEnd);

Node* e = body->next;
  while(e != body->end)
  {
   std::cout << e->id << std::endl;
   e = e->next;
  }
}

Show compiler warnings [ + ] Compiler args [ + ] Show input
Compilation time: 0.43 sec, absolute running time: 0.07 sec, cpu time: 0.02 sec, memory peak: 3 Mb, absolute service time: 0,51 sec