with Ada.Text_IO;
with Ada.Text_IO.Unbounded_IO;
with Ada.Strings.Unbounded;      use Ada.Strings.Unbounded;
with Ada.Containers.Vectors;     use Ada.Containers;
 
procedure Quotes is
   package IO renames Ada.Text_IO;
   package SUIO renames Ada.Text_IO.Unbounded_IO;
   package Quote_Container is new Vectors (Natural, Unbounded_String);
   use Quote_Container;
   Quotes    : Vector;
   Input     : IO.File_Type;
   A_Cursor  : Cursor;
begin
   IO.Open (File => Input,
            Mode => IO.In_File,
            Name => "quotes.txt");
   while not IO.End_Of_File (File => Input) loop
      Quotes.Append (New_Item => SUIO.Get_Line (File => Input));
   end loop;
   IO.Close (Input);
 
   --  Point the cursor to index 1
   A_Cursor := Quotes.To_Cursor (Index => 1);
   SUIO.Put_Line (Item => Element (Position => A_Cursor));
 
   --  Point the cursor to index 5
   A_Cursor := Quotes.To_Cursor (Index => 5);
   SUIO.Put_Line (Item => Element (Position => A_Cursor));
 
   --  Point the cursor to a non-existant index
   A_Cursor := Quotes.To_Cursor (Index => 42);
   if A_Cursor = No_Element then
      IO.Put_Line (Item => "No_Element");
   end if;
end Quotes;

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