1.\" Copyright (c) 1991 The Regents of the University of California. 2.\" All rights reserved. 3.\" 4.\" %sccs.include.proprietary.man% 5.\" 6.\" @(#)ratfor.1 6.6 (Berkeley) 04/16/91 7.\" 8.Vx 9.Vx 10.Dd 11.Dt RATFOR 1 12.Os ATT 7th 13.Sh NAME 14.Nm ratfor 15.Nd rational Fortran dialect 16.Sh SYNOPSIS 17.Nm ratfor 18.Op Ar option ... 19.Op Ar filename ... 20.Sh DESCRIPTION 21.Nm Ratfor 22converts a rational dialect of Fortran into ordinary irrational Fortran. 23.Nm Ratfor 24provides control flow constructs essentially identical to those in C: 25.Tw Fl 26.Tp statement grouping: 27{ statement; statement; statement } 28.Tp decision-making: 29.Ds I 30if (condition) statement { else statement } 31switch (integer value) { 32\tcase integer: statement 33\t... 34\t[default]: statement 35} 36.De 37.Tp loops: 38.Ds L 39while (condition) statement 40for (expression; condition; expression) statement 41do limits statement 42repeat statement [until (condition)] 43break 44next 45.De 46.Tp 47.Pp 48and some syntactic sugar to make programs easier to read and write: 49.Tw Fl 50.Tp free form input: 51multiple statements/line; automatic continuation 52.Tp comments: 53# this is a comment 54.Tp translation of relationals: 55>, >=, etc., become .GT., .GE., etc. 56.Tp return (expression) 57returns expression to caller from function 58.Tp define: 59define name replacement 60.Tp include: 61include filename 62.Tp 63.Pp 64.Nm Ratfor 65is best used with 66.Xr f77 1 . 67.Sh SEE ALSO 68.Xr f77 1 69.br 70B. W. Kernighan and P. J. Plauger, 71.Em Software Tools , 72Addison-Wesley, 731976. 74.Sh HISTORY 75.Nm Ratfor 76appeared in Version 7 AT&T UNIX. 77