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OPAL (OPtimized Applicative Language) is a functional programming language first developed at the Technical University of Berlin. ==Example program== This is an example OPAL program, which calculates the GCD recursively. Signature file: SIGNATURE GCD FUN GCD: nat * * nat -> nat Implementation file: IMPLEMENTATION GCD IMPORT Nat COMPLETELY DEF GCD(a,b) == IF a % b = 0 THEN b ELSE IF a-b < b THEN GCD(b,a-b) ELSE GCD(a-b,b) FI FI 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Opal (programming language)」の詳細全文を読む スポンサード リンク
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