.TH STRUCT 1 .SH NAMEstruct \- structure Fortran programs.SH SYNOPSIS.B struct[ option ] ...file.SH DESCRIPTION.LP.I Structtranslates the Fortran program specified by.I file(standard input default)into a Ratfor program.Wherever possible, Ratfor control constructsreplace the original Fortran.Statement numbers appear only where still necessary.Cosmetic changes are made, including changing Hollerith stringsinto quoted stringsand relational operators into symbols (.e.g. `.GT.' into `>').The output is appropriately indented..PPThe following options may occur in any order..TP.B  \-sInput is accepted in standard format, i.e.comments are specified by a c, C, or * in column 1, and continuation linesare specified by a nonzero, nonblank character in column 6.Normally, a statement whose first nonblank characteris not alphanumeric is treated as a continuation..TP.B  \-iDo not turn computed goto statements intoswitches.(Ratfor does not turn switches backinto computed goto statements.).TP.B  \-aTurn sequences of else ifs into anon-Ratfor switch of the form.IP.nf.ta 5 7switch {		case pred1: code		case pred2: code		case pred3: code		default: code	}.fi.DT.IPThe case predicates are tested in order;the code appropriate to only one case is executed.This generalized form of switch statement does notoccur in Ratfor..TP.B  \-bGenerate goto's instead of multilevel break statements..TP.B  \-nGenerate goto's instead of multilevel next statements..TP.TP.BI \-e nIf .I nis 0 (default),place code within a loop only if it canlead to an iteration of the loop.If.I nis nonzero,admit code segments with fewer than.I nstatements to a loopif otherwise the loop would have exits to several places including the segment,and the segment can be reached only from the loop..SH FILES/tmp/struct*.br/usr/lib/struct/*.SH SEE ALSOf77(1).SH BUGSStruct knows Fortran 66 syntax, but not full Fortran 77(alternate returns, IF...THEN...ELSE, etc.).brIf an input Fortran program contains identifiers whichare reserved words in Ratfor, the structuredversion of the programwill not be a valid Ratfor program..brExtended range DO's generate cryptic errors..brColumns 73-80 are not special even when.B \-sis in effect..brWill not generate Ratfor FOR statements.