SysIII/usr/src/man/man1/ratfor.1

.TH RATFOR 1
.SH NAME
ratfor \- rational Fortran dialect
.SH SYNOPSIS
.B ratfor
[ options ]
[ files ]
.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:
.RS
.TP
statement grouping:
{ statement; statement; statement }
.TP
decision-making:
.nf
\f3if\fP (condition) statement [ \f3else\fP statement ]
\f3switch\fP (integer value) {
	\f3case\fP integer:	statement
	...
	[ \f3default\fP: ]	statement
}
.fi
.TP
loops:
.br
.nf
\f3while\fP (condition) statement
\f3for\fP (expression; condition; expression) statement
\f3do\fP limits statement
\f3repeat\fP statement [ \f3until\fP (condition) ]
\f3break\fP
\f3next\fP
.fi
.RE
.PP
and some syntactic sugar to make programs easier to read and write:
.RS
.TP
free form input:
multiple statements/line; automatic continuation
.TP
comments:
.B #
this is a comment.
.TP
translation of relationals:
.BR > ,
.BR >= ,
etc., become
.BR .\s-1GT\s+1. ,
.BR .\s-1GE\s+1. ,
etc.
.TP
return expression to caller from function:
\f3return\fP (expression)
.TP
define:
.br
.B define
.I name replacement\^
.TP
include:
.br
.B include
.I file\^
.RE
.PP
The option
.B \-h
causes quoted strings to be turned into
.B 27H
constructs.
The
.B \-C
option copies comments to the output and
attempts to format it neatly.
Normally, continuation lines are marked with a
.B &
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
ef\&l(1),
f77(1).
.br
B. W. Kernighan and P. J. Plauger,
.IR "Software Tools" ,
Addison-Wesley, 1976.