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Ratfor (short for ''Rational Fortran'') is a programming language implemented as a preprocessor for Fortran 66. It provided modern control structures, unavailable in Fortran 66, to replace GOTOs and statement numbers. == Features == Ratfor provides the following kinds of flow-control statements, described by Kernighan and Plauger as "shamelessly stolen from the language C, developed for the UNIX operating system by D.M. Ritchie" ("Software Tools", p. 318): * statement grouping with braces * if-else, while, for, do, repeat-until, break, next * "free-form" statements, i.e., not constrained by Fortran format rules * <, >, >=, ... in place of .LT., .GT., .GE., ... * include * # comments For example, the following code if (a > b) else might be translated as IF(.NOT.(A.GT.B))GOTO 1 MAX = A GOTO 2 1 CONTINUE MAX = B 2 CONTINUE The version of Ratfor in ''Software Tools'' is itself written in Ratfor, as are the sample programs, and inasmuch as its own translation to Fortran is available, it can be ported to any Fortran system. Ratfor source code file names end in .r or .rat. 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「Ratfor」の詳細全文を読む スポンサード リンク
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