ELICA

1
ELICA
Xth HungaroLogo, September 24, 2005, Budapest,
Hungary
NATURAL OBJECT-ORIENTED PROGRAMMING

• Pavel Boytchev
• www.elica.netpavel_at_elica.net

2
OOP and Natural OOP

• OOP
• collection of concepts, tools and styles
• requires changes in language syntax (C, Pascal,
  Logo)
• complex terminology
• Natural OOP
• extended collection of concepts, tools and styles
• no changes in language syntax
• no new terminology

3
NOOP Concepts

• No specialized data structures for OOP elements.
• No special commands and functions to manage OOP
  elements.
• Every variable is local to another variable,
  except for a system defined root variable.
• Procedure zombies

4
Procedure Object
Arg1
Arg2
Arg1
Arg2
Procedure Code
ConstructorCode
Var1
Var2
Field1
Field2
SubProc1
Method1
SubProc2
Method2
5
Example
to point x y definition to test print
"x x "y y end test end make "q point 5 6
construction print q.x q.y retrieving
data make "q.x 10 modifying data q.test met
hods
6
OOP Features in NOOP

• Classes and instances
• Inherited objects
• Polymorphism
• Multiple parents
• Real-time instance modification
• Real-time class modification

7
Turtle Evolution
8
Demonstrations

• Car Turtle
• Chess
• Androids

9
The End