ratfor.1

<B>Digital的Unix操作系统VAX 4.2源码</B>

.\" SCCSID: @(#)ratfor.1	8.1	9/11/90
.TH ratfor 1 VAX "" Unsupported
.SH Name
ratfor \- rational FORTRAN dialect
.SH Syntax
.B ratfor
[ \fIoption\fP ... ]
[ \fIfilename\fP ... ]
.SH Description
The 
.PN ratfor
command converts a rational dialect of 
FORTRAN into ordinary irrational FORTRAN.
.PN 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
next
.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
.PN ratfor
is best used with
.MS f77 1 .
.SH See Also
f77(1)
.br
B. W. Kernighan and P. J. Plauger,
.IR "Software Tools" ,
Addison-Wesley, 1976.