public static void Main(string[] s)
{
bool tr = true;
LinkedList ll=new LinkedList();
while (tr)
{
System.Console.WriteLine("\nEnter a choice\n1.Add\n2.Delete\n3.Print Linked List\n4.Print Length of List\n5.Exit");
int a = int.Parse(System.Console.ReadLine());
switch (a)
{
case 1:
bool tr1 = true;
while (tr1)
{
System.Console.WriteLine("\nPlease enter a choice:\n1.Add at Beginning\n2.Add in middle\n3.Add at end\n4.Print Linked List\n5.Print Length of List\n6.Back");
int sw = int.Parse(System.Console.ReadLine());
switch (sw)
{
case 1:
System.Console.WriteLine("Enter element to enter:");
int ad = int.Parse(System.Console.ReadLine());
ll.addFirst(ad);
break;
case 2:
System.Console.WriteLine("Enter element to enter:");
ad = int.Parse(System.Console.ReadLine());
System.Console.WriteLine("Enter the index :");
int n = int.Parse(System.Console.ReadLine());
ll.addIndex(ad, n);
System.Console.WriteLine();
break;
case 3:
System.Console.WriteLine("\nEnter element to enter:");
ad = int.Parse(System.Console.ReadLine());
ll.addLast(ad);
break;
case 4:
ll.printList(first);
break;
case 5:
System.Console.WriteLine(ll.printLength());
break;
case 6:
tr1 = false;
break;
default:
System.Console.WriteLine("Invalid Choice!!!");
break;
}
}
break;
case 2:
bool tr2 = true;
while (tr2)
{
System.Console.WriteLine("\nPlease enter a choice:\n1.Delete at Beginning\n2.Delete in middle\n3.Delete at end\n4.Print Linked List\n5.Print Length of List\n6.Back");
int sw = int.Parse(System.Console.ReadLine());
switch (sw)
{
case 1:
ll.deleteFirst();
break;
case 2:
System.Console.WriteLine("Enter pos to del the element:");
int ps = int.Parse(System.Console.ReadLine());
ll.deleteIndex(ps);
break;
case 3:
ll.deleteLast();
break;
case 4:
ll.printList(first);
break;
case 5:
System.Console.WriteLine(ll.printLength());
break;
case 6:
tr2 = false;
break;
default:
System.Console.WriteLine("Invalid Option!!");
break;
}
}
break;
case 3:
ll.printList(first);
break;
case 4:
System.Console.WriteLine(ll.printLength());
break;
case 5:
tr = false;
break;
default:
System.Console.WriteLine("Invalid Option!!");
break;
}
}
}
