考前速记

Prolog

% Fact (lowercase, dot)
likes(john, apple).

% Rule (:- = IF, , = AND)
happy(X) :- likes(X, apple), sweet(apple).

% Query (?- = ask)
?- happy(X).

OOP Keywords

Concept	Meaning
CLASS	Template for objects
NEW	Constructor
PRIVATE	Encapsulation (hide data)
EXTENDS	Inheritance
Override	Polymorphism

RPN Stack Evaluation

Token  | Stack
3      | [3]
4      | [3,4]
+      | [7]
2      | [7,2]
×      | [14]

⚠ a b - = a − b (NOT b − a) ⚠ a b / = a ÷ b (NOT b ÷ a)

File Modes

Mode	Action
"r"	Read
"w"	Write (overwrite)
"a"	Append

MUST CLOSEFILE!

Exception Handling

TRY
    // code that might fail
EXCEPT
    // handle error gracefully
ENDTRY

Catches runtime errors only, not syntax errors.

Paradigm ID — Quick Check

Code has...	Paradigm
CLASS, methods	OOP
facts, rules, ?-	Declarative
MOV, registers	Low-level
FOR, WHILE, ←	Imperative