0
mainQ->Enqueue(gcnew message(101));
   mainQ->Enqueue(gcnew message(102));
   mainQ->Enqueue(gcnew message(103));

I wanted to put just the objects of message class and it has one thing, That is "routing key" of the message.

0

Not as such, Now I have thought to create the queue as linked list and put messages I have a working queue class, but as I tried to use the message class object "msg" into it as elements of queue.
its asking me
cannot declare a managed 'msg' in an unmanaged 'queue'. Can you please please help me what should I do. the code is as below:

// linkedlistqueue.cpp : main project file.

#include "stdafx.h"
#include"stdio.h"
using namespace System;
using namespace System::Collections;
#include "message.h"
class queue
{
 message msg;
 queue* next;
public:
 queue* enqueue(queue*,int);
 queue* dequeue(queue*);
 void queue_display(queue*);
}*head,*tail,object;

queue* queue::enqueue(queue* head,message key)
{
 queue* temp;
 temp=new queue;
 temp->element=key;
 temp->next=nullptr;
 if(head==nullptr)
  head=temp;
 else
  tail->next=temp;
 tail=temp;
 return head;
}
//****************************************************
queue* queue::dequeue(queue* head)
{
queue* temp;
if(head==nullptr)
{
 return nullptr;
}
else if(head->next==nullptr)
{
  return nullptr;
}
else
{
 //Console::WriteLine("the element that is dequeued {0}",head->element);
 temp=head->next;
 head=temp;
 return head;
}
}
//***************************************************************
void queue::queue_display(queue* head)
{
 if(head!=nullptr)
 {
  while(head->next!=nullptr)
  {
   Console::WriteLine(" the element is {0}",head->element);
   head=head->next;
  }
  Console::WriteLine("{0}",head->element);

 }
 else
  Console::WriteLine("the queue is empty");
}

void main()
{
 
 head=tail=nullptr; 
 head=object.enqueue(head,(gcnew message(101)));
  head=object.enqueue(head,(gcnew message(102)));
  head=object.dequeue(head); 
  object.queue_display(head); 
 Console::ReadLine();
}

while the message class is same

public ref class message
{
 public:
  property int routingkey;
  
  message(int Id)
  { 
	  routingkey = Id;
  }

  int message::getType()
  {
   return routingkey;
  }
 
  
};
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