NAME

ratfor − rational Fortran dialect

SYNOPSIS

ratfor [ options ] [ files ]

DESCRIPTION

Ratfor converts a rational dialect of Fortran into ordinary irrational Fortran.  Ratfor provides control flow constructs essentially identical to those in C:

statement grouping:
{ statement; statement; statement }

decision-making:

if (condition) statement [ else statement ]
switch (integer value) {
case integer:statement
...
[ default: ]statement
}

loops:

while (condition) statement
for (expression; condition; expression) statement
do limits statement
repeat statement [ until (condition) ]
break
next

and some syntactic sugar to make programs easier to read and write:

free form input:
multiple statements per line and automatic continuation of lines

comments:
# this is a comment. 

compiler directives:
directives beginning with a dollar sign ($) in column one are passed through to the compiler unchanged. 

translation of relationals:
>, >=, etc., become .GT., .GE., etc. 

return expression to caller from function:
return (expression)

define:
define name replacement

include:
include file

Options are as follows:

−h causes quoted strings to be turned into Hollerith constructs such as, for example, 27H. 

−C copies comments to the output and attempts to format it neatly. 

−6c normally, continuation lines are marked with an & in column 1.  The option −6c makes the continuation character c and places it in column 6. 

Ratfor is best used with f77(1).

DEPENDENCIES

Series 300:
Options may be passed to ratfor through f77(1) by using the −W option specifier. 

Series 500:
Fc (on f77(1)) does not recognize ratfor.r files.  Therefore, ratfor must be called directly. 

The −h option should not be used. 

The −6x option must be used for successful automatic continuation. 

SEE ALSO

f77(1).  B. W. Kernighan and P. J. Plauger, Software Tools, Addison-Wesley, 1976.

Hewlett-Packard Company  —  Version B.1,  May 11, 2021