How to implemet Linear Queue By Linklist?

#include<iostream>
#include<stdlib.h>
using namespace std;
struct node
{
                int data;
                struct node *next;
}*front=NULL,*rear,*temp;
void ins()
{
                temp=new node;
                cout<<"Enter data:";
                cin>>temp->data;
                temp->next=NULL;       

                if(front==NULL)
                                front=rear=temp;
                else
                {
                                rear->next=temp;
                                rear=temp;
                }
                cout<<"Node has been inserted\n";     
}
void del()
{
                if(front==NULL)
                                cout<<"Queue is empty\n";
                else
                {
                                temp=front;
                                front=front->next;
                                cout<<"Deleted node is "<<temp->data<<"\n";
                                delete(temp);
                }
}
void dis()
{
                if(front==NULL)
                                cout<<"Queue is empty\n";
                else
                {
                                temp=front;
                                while(temp->next!=NULL)
                                {
                                                cout<<temp->data<<"->";
                                                temp=temp->next;
                                }

                                cout<<temp->data;
                }
}
main()
{
                int ch;
                while(1)
                {
                                cout<<"\n*** Menu ***"<<"\n1.Insert\n2.Delete\n3.Display\n4.Exit";
                                cout<<"\n\nEnter your choice(1-4):";
                                cin>>ch;
                                cout<<"\n";

                                switch(ch)
                                {
                                                case 1:  ins();
                                                                break;
                                                case 2: del();
                                                                break;
                                                case 3: dis();
                                                                break;
                                                case 4: exit(0);
                                                                break;
                                                default: cout<<"Wrong Choice!!!";
                                }
                }

                return 0;
}