linked list with all possible operations using class with oops concept

#include<iostream>
//#include<conio.h>
#include<stdlib.h>
using namespace std;
class Node
{
public:
int info;
Node* next;
};
class List:public Node
{
Node *first,*last;
public:
List()
{
first=NULL;
last=NULL;
}
void create();
void insert();
void delet();
void display();
void search();
};
void List::create()
{
Node *temp;
temp=new Node;
int n;
cout<<"\nEnter an Element:";
cin>>n;
temp->info=n;
temp->next=NULL;
if(first==NULL)
{
first=temp;
last=first;
}
else
{
last->next=temp;
last=temp;
}
}
void List::insert()
{
Node *prev,*cur;
prev=NULL;
cur=first;
int count=1,pos,ch,n;
Node *temp=new Node;
cout<<"\nEnter an Element:";
cin>>n;
temp->info=n;
temp->next=NULL;
cout<<"\nINSERT AS\n1:FIRSTNODE\n2:LASTNODE\n3:IN BETWEEN FIRST&LAST NODES";
cout<<"\nEnter Your Choice:";
cin>>ch;
switch(ch)
{
case 1:
temp->next=first;
first=temp;
break;
case 2:
last->next=temp;
last=temp;
break;
case 3:
cout<<"\nEnter the Position to Insert:";
cin>>pos;
while(count!=pos)
{
prev=cur;
cur=cur->next;
count++;
}
if(count==pos)
{
prev->next=temp;
temp->next=cur;
}
else
cout<<"\nNot Able to Insert";
break;
}
}
void List::delet()
{
Node *prev=NULL,*cur=first;
int count=1,pos,ch;
cout<<"\nDELETE\n1:FIRSTNODE\n2:LASTNODE\n3:IN BETWEEN FIRST&LAST NODES";
cout<<"\nEnter Your Choice:";
cin>>ch;
switch(ch)
{
case 1:
if(first!=NULL)
{
cout<<"\nDeleted Element is "<<first->info;
first=first->next;
}
else
cout<<"\nNot Able to Delete";
break;
case 2:
while(cur!=last)
{
prev=cur;
cur=cur->next;
}
if(cur==last)
{
cout<<"\nDeleted Element is: "<<cur->info;
prev->next=NULL;
last=prev;
}
else
cout<<"\nNot Able to Delete";
break;
case 3:
cout<<"\nEnter the Position of Deletion:";
cin>>pos;
while(count!=pos)
{
prev=cur;
cur=cur->next;
count++;
}
if(count==pos)
{
    cout<<"\nDeleted Element is: "<<cur->info;
    prev->next=cur->next;
}
else
cout<<"\nNot Able to Delete";
break;
}
}
void List::display()
{
Node *temp=first;
if(temp==NULL)
{
cout<<"\nList is Empty";
}
while(temp!=NULL)
{ cout<<"START-->";
cout<<temp->info;
cout<<"-->";
temp=temp->next;
}
cout<<"NULL";
}
void List::search()
{
int value,pos=0;
int flag=0;
if(first==NULL)
{
cout<<"List is Empty";
return;
}
cout<<"Enter the Value to be Searched:";
cin>>value;
Node *temp;
temp=first;
while(temp!=NULL)
{
pos++;
if(temp->info==value)
{
flag=1;
cout<<"Element"<<value<<"is Found at "<<pos<<" Position";
return;
}
temp=temp->next;
}
if(flag==0)
{
cout<<"Element "<<value<<" not Found in the List";
}
}
int main()
{
List l;
int ch;
while(1)
{
cout<<"\n**** MENU ****";
cout<<"\n1:CREATE\n2:INSERT\n3:DELETE\n4:SEARCH\n5:DISPLAY\n6:EXIT\n";
cout<<"\nEnter Your Choice:";
cin>>ch;
switch(ch)
{
case 1:
l.create();
break;
case 2:
l.insert();
break;
case 3:
l.delet();
break;
case 4:
l.search();
break;
case 5:
l.display();
break;
case 6:
exit(0);
}
}
// getch();
}