.TH RATFOR 1
.SH NAME
ratfor \- rational Fortran dialect
.SH SYNOPSIS
.B ratfor
[ option ... ]
[ filename ... ]
.SH DESCRIPTION
.I Ratfor
converts a rational dialect of Fortran into ordinary irrational Fortran.
.I Ratfor
provides control flow constructs essentially identical to those in C:
.TP
statement grouping:
.nf
{ statement; statement; statement }
.TP
decision-making:
if (condition) statement [ else statement ]
.br
switch (integer value) {
	case integer:	statement
	...
	[ default: ]	statement
}
.TP
loops:
while (condition) statement
for (expression; condition; expression) statement
do limits statement
repeat statement [ until (condition) ]
break [n]
next [n]
.LP
and some syntactic sugar to make programs easier to read and write:
.TP
free form input:
multiple statements/line; automatic continuation
.TP
comments:
# this is a comment
.TP
translation of relationals:
>, >=, etc., become .GT., .GE., etc.
.TP
return (expression)
returns expression to caller from function
.TP
define:
define name replacement
.TP
include:
include filename
.PP
.fi
The option
.B \-h
causes quoted strings to be turned into
27H constructs.
.B \-C
copies comments to the output, and attempts
to format it neatly.
Normally, continuation lines are marked with a &
in column 1;
the option
.B \-6x
makes the continuation character
.B x
and places it in column 6.
.PP
.I Ratfor
is best used with
.IR f77 (1).
.SH "SEE ALSO"
f77(1)
.br
B. W. Kernighan and P. J. Plauger,
.IR "Software Tools" ,
Addison-Wesley, 1976.
.br
B. W. Kernighan, \fIRatfor \(em A Preprocessor for a Rational Fortran\fP