static void Main(string[] args)
{
int choice,
dataType = ListElementTypeChoice();
GenericLinkedList <int> intList = new GenericLinkedList <int>();
GenericLinkedList <double> doubleList = new GenericLinkedList <double>();
GenericLinkedList <string> stringList = new GenericLinkedList <string>();
switch (dataType)
{
case 1:
intList.CreateList();
break;
case 2:
doubleList.CreateList();
break;
case 3:
stringList.CreateList();
break;
}
while (true)
{
choice = GetMenuChoice();
if (choice is 12)
{
return;
}
switch (dataType)
{
case 1:
AppOperations(intList, choice);
break;
case 2:
AppOperations(doubleList, choice);
break;
case 3:
AppOperations(stringList, choice);
break;
}
WriteLine();
}
}
static void AppOperations <T>(GenericLinkedList <T> aList, int choice)
{
int position;
T data;
object holder = null;
switch (choice)
{
case 1:
aList.Display();
break;
case 2:
Write("Enter the value of the node to be inserted: ");
do
{
try
{
holder = Convert.ChangeType(ReadLine(), typeof(T));
}
catch (Exception)
{
WriteLine($"Value entered must be {typeof(T).Name}.\n");
Write("Enter the value of the node to be inserted: ");
}
} while (holder is null);
data = (T)holder;
aList.InsertAtBeginning(data);
break;
case 3:
Write("Enter the value of the node to be inserted: ");
do
{
try
{
holder = Convert.ChangeType(ReadLine(), typeof(T));
}
catch (Exception)
{
WriteLine($"Value entered must be {typeof(T).Name}.\n");
Write("Enter the value of the node to be inserted: ");
}
} while (holder is null);
data = (T)holder;
aList.InsertAtEnd(data);
break;
case 4:
Write("Enter the value of the node to be inserted: ");
do
{
try
{
holder = Convert.ChangeType(ReadLine(), typeof(T));
}
catch (Exception)
{
WriteLine($"Value entered must be {typeof(T).Name}.\n");
Write("Enter the value of the node to be inserted: ");
}
} while (holder is null);
data = (T)holder;
Write("Enter the position where the node is to be inserted at: ");
while (!int.TryParse(ReadLine(), out position))
{
WriteLine("Value entered must be an integer.\n");
Write("Enter the position where the node is to be inserted at: ");
}
aList.InsertAtPosition(data, position);
break;
case 5:
try
{
data = aList.DeleteFirstNode();
WriteLine($"Value of the node deleted was {data}.");
}
catch (InvalidOperationException ex)
{
WriteLine(ex.Message);
}
break;
case 6:
try
{
data = aList.DeleteLastNode();
WriteLine($"Value of the node deleted was {data}.");
}
catch (InvalidOperationException ex)
{
WriteLine(ex.Message);
}
break;
case 7:
try
{
Write("Enter the position where the node to be deleted is at: ");
while (!int.TryParse(ReadLine(), out position))
{
WriteLine("Value entered must be an integer.\n");
Write("Enter the position where the node to be deleted is at: ");
}
data = aList.DeleteNodeAtPosition(position);
WriteLine($"Value of the node deleted was {data}.");
}
catch (InvalidOperationException ex)
{
WriteLine(ex.Message);
}
break;
case 8:
aList.ReverseList();
break;
case 9:
Write("Enter the value where a cycle should be inserted: ");
do
{
try
{
holder = Convert.ChangeType(ReadLine(), typeof(T));
}
catch (Exception)
{
WriteLine($"Value entered must be {typeof(T).Name}.\n");
Write("Enter the value of the node to be inserted: ");
}
} while (holder is null);
data = (T)holder;
aList.InsertCycle(data);
break;
case 10:
if (aList.HasCycle())
{
WriteLine("The current list has a cycle.\n");
}
else
{
WriteLine("The current list doesn\'t have a cycle.\n");
}
break;
case 11:
aList.RemoveCycle();
break;
}
WriteLine();
}