Array opertions in C++

//C++ Program to Perform Array opertion ,create,delete,insert

#include<iostream.h>

#include<conio.h>

class operation

{

 int n,a[12];

 public:

  void create();

  void insert(int p,int ele);

  void deletion(int p);

  void disp();

};

 void operation::create()

  {

   int i;

   cout<<"\t Enter the number of element : ";

   cin>>n;

   cout<<"\t Enter the array element  : ";

   for(i=0;i<n;i++)

    cin>>a[i];

  }

 void operation::insert(int p,int ele)

  {

   int i;

   for(i=n-1;i>=p;i--)

  {

   a[i+1]=a[i];

  }

   a[p]=ele;

   n=n+1;

  }

 void operation::deletion(int p)

  {

   int i,ele;

   ele=a[p];

   for(i=p+1;i<n;i++)

   {

    a[i-1]=a[i];

   }

   n=n-1;

   cout<<"deleted element : "<<ele<<endl;

  }

 void operation::disp()

  {

   int i,ele;

   cout<<"Given array is : "<<endl;

   for(i=0;i<n;i++)

   cout<<"\t"<<a[i]<<endl;

  }

 int main()

 {

  int b,n;

  clrscr();

  cout<<"Array  operation "<<endl;

  cout<<"~~~~~  ~~~~~~~~~ "<<endl;

  do

  {

   operation a;

  int ch ,p ,ele;

  cout<<" \t 1.create  "<<endl;

  cout<<" \t 2.Insert"<<endl;

  cout<<" \t 3.Delete"<<endl;

  cout<<"\t Enter the choice            : ";

  cin>>ch;

 switch(ch)

   {

     case 1:

      a.create();

      break;

    case 2:

     cout<<" Enter the position       : ";

     cin>>p;

     cout<<" Enter the insert element : ";

     cin>>ele;

     cout<<"Before insertion"<<endl;

     cout<<"~~~~~~ ~~~~~~~~~"<<endl;

     a.disp( );

     cout<<"\n After insertion"<<endl;

     cout<<"~~~~~~~~ ~~~~~~~~~"<<endl;

     a.insert(p,ele);

     a.disp();

    break;

    case 3:

     cout<<"Enter the position        : ";

     cin>>p;

     cout<<"Before deletion"<<endl;

     cout<<" ~~~~~~ ~~~~~~~~"<<endl;

     a.disp();

     cout<<"\n After Deletion"<<endl;

     cout<<" ~~~~~ ~~~~~~~~"<<endl;

     a.deletion(p);

     a.disp();

     break;

    }

     cout<<" press 1 to continue: ";

     cin>>b;

   }while(b!=0);

 getch();

 }