while (noErrors)
   Printblock (
   Tasks:
      1) Produce guest list
      2) Organize finance
      3) Books
      4) Sort
   }
   Print (Select task to perform:)
   Get (userinput)
   switch (userinput) 
   {
      case 1: guestList (); break;
      case 2: finance (); break;
      case 3: books (); break;
      case 4: sort (); break;
      default: Print ("Bad input");
                 noErrors = false;
   }
}