Re: ?? exec prog << value ??
- From: Bryan Oakley <oakley@xxxxxxxxxxxxxxxxxxxx>
- Date: Thu, 31 May 2007 12:31:15 -0500
Zeh Mau wrote:
Hello comp.lang.tcl !!!
I have the following problem:
I have created a program with with flex and bison (lex, yacc),
a small calculator,
now i want to execute the program within a tcl-script.
Therefore I write
exec prog << var
where var shall be the mathematical expression, e.g. 2+2
Now I thought,
the prog will be executed and by using
<<
the value of var (string) 2+2 will be passed as input to prog.
Unfortunately, there is only
the message "syntax error" instead of - as i have expected - 4.
Show us the complete and actual error message, as well as the exact line of code. Otherwise we can only guess.
In addition, also tell us what happens when you do "echo '2+2' | prog" from the command line.
--
Bryan Oakley
http://www.tclscripting.com
.
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