public static void Menu(BTree btree)
{
string str = "";
bool exit = false;
Console.WriteLine("Welcome to the menu: ");
while (!exit)
{
Console.WriteLine(" _________________________________________________");
Console.WriteLine("| |");
Console.WriteLine("| > a - Add the element (double) |");
Console.WriteLine("| > ai - Add an interval from a to b with step c |");
Console.WriteLine("| > f - Find an element in the B-tree |");
Console.WriteLine("| > d - Delete the element (double) |");
Console.WriteLine("| > di - Delete an interval from a to b |");
Console.WriteLine("| > o - Out the B-tree |");
Console.WriteLine("| > e - Exit |");
Console.WriteLine("|_________________________________________________|");
str = Console.ReadLine();
switch (str)
{
case "a":
{
Console.Clear();
string elem;
double key;
bool correct = false;
while (!correct)
{
try
{
Console.Write("Add the element: ");
elem = Console.ReadLine();
key = Convert.ToDouble(elem);
correct = true;
btree.Insert(key);
}
catch (FormatException)
{
Console.Write("Incorrect input, try again: ");
correct = false;
}
catch (OverflowException)
{
Console.Write("Incorrect input, try again: ");
correct = false;
}
}
Console.Clear();
btree.Out();
}
break;
case "ai":
{
Console.Clear();
Console.WriteLine("Add an interval from a to b with step c");
string a, b, c;
double beg, end, step;
bool correct = false;
while (!correct)
{
try
{
Console.Write("From: ");
a = Console.ReadLine();
Console.Write("To: ");
b = Console.ReadLine();
Console.Write("Step: ");
c = Console.ReadLine();
beg = Convert.ToDouble(a);
end = Convert.ToDouble(b);
step = Convert.ToDouble(c);
correct = true;
for (double i = beg; i < end; i += step)
btree.Insert(i);
}
catch (FormatException)
{
Console.Write("Incorrect input, try again: ");
correct = false;
}
catch (OverflowException)
{
Console.Write("Incorrect input, try again: ");
correct = false;
}
}
Console.Clear();
btree.Out();
}
break;
case "f":
{
Console.Clear();
string elem;
double key;
bool correct = false;
while (!correct)
{
try
{
Console.Write("Find the element: ");
elem = Console.ReadLine();
key = Convert.ToDouble(elem);
correct = true;
if (btree.Find(key) != -1.0)
btree.Out(key);
else
Console.WriteLine("There is no key like it");
}
catch (FormatException)
{
Console.Write("Incorrect input, try again: ");
correct = false;
}
catch (OverflowException)
{
Console.Write("Incorrect input, try again: ");
correct = false;
}
}
}
break;
case "d":
{
Console.Clear();
string elem;
double key;
bool correct = false;
while (!correct)
{
try
{
Console.Write("Delete the element: ");
elem = Console.ReadLine();
key = Convert.ToDouble(elem);
correct = true;
btree.Out(key);
if (!btree.Delete(key))
{
Console.WriteLine("The element isn't in the tree");
elem = Console.ReadLine();
Console.Clear();
break;
}
else
{
Console.WriteLine("Delete?");
elem = Console.ReadLine();
Console.Clear();
btree.Out();
}
}
catch (FormatException)
{
Console.Write("Incorrect input, try again: ");
correct = false;
}
catch (OverflowException)
{
Console.Write("Incorrect input, try again: ");
correct = false;
}
}
}
break;
case "di":
{
Console.Clear();
Console.WriteLine("Not Workable");
}
break;
case "o":
{
Console.Clear();
btree.Out();
}
break;
case "e":
{
exit = true;
Console.Clear();
}
break;
default:
{
Console.Clear();
}
break;
}
}
}
static void Main(string[] args)
{
BTree btree = new BTree();
Menu(btree);
}