Summary of A++ features:

• constitutive principles of A++:
  • ARS (basic operations):
    • abstraction
      
      
    • reference
      
      
    • synthesis
      
      
  • lexical scope
    
    
  • closure
    
    
• programming paradigms supported:
  
  
  • functional programming,
    (writing expressions to be evaluated),
    
    
  • object oriented programming
    (sending messages to objects),
    
    
  • imperative programming
    (writing statements to be executed), including structured programming.
    
    
  • logic programming
    (rule based programming) (ARS++ recommended!)
    
    
• features directly derived from ARS:
  
  
  • logical abstractions
    (true, false, if, not, and, or),
    
    
  • numerical abstractions
    (natural numbers, zerop, succ, pred, add, sub, mult),
  • relational abstractions,
    (equalp, gtp, ltp, gep)
    
    
  • recursion,
  • creation and processing of lists
    (cons, car, cdr, nil, nullp, llength, remove, nth, assoc),
    
    
  • higher order functions
    (compose, curry, map, mapc, map2, filter, locate, for-each) ,
    
    
  • set operations
    (memberp, union, addelt),
    
    
  • iterative control structure ('while'),
    
    
• development of applications like `simple account handling' and `library management'.
  
  

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