queue- testing

#include<iostream.h>
    #include<conio.h>
    #include<stdio.h>
    struct emp
    { int eno;
      char ename[15];
       emp *link;

    };
    emp *front=NULL;
    emp *rear=NULL;
    emp *temp=NULL;
    void insert()
    {
      emp *temp=new emp;
      cin>>temp->eno;
      gets(temp->ename);
      temp->link=NULL;
      if (front==NULL)
      {
     front=temp;
     rear=temp;
      }
      else
       {    rear->link=temp;
        rear=temp;
       };
    }
    void display()
    { temp=front;
      while(temp!=NULL)
    {
      cout<<temp->eno;
      cout<<temp->ename;
      temp=temp->link;
    }
     }
    void main()
    {
    clrscr();
    char ch;
    cout<<"enter choice: 1. insert 2.display 3.exit";
    cin>>ch;
    switch (ch)
    {
     case 1:
     {   insert();
      break;
     }
     case 2:
     {   display();
     break;
     }
     case 3:
     { break;
     }
    }
    getch();
    }