expression input

[Vincent Demarcus]

Hi guys,
first, thanks for your great package!

I am trying to let users input expressions with matrix indices in their 
expressions (like A.i). I order to try this feature, I wrote a simple 
program (see attached file try.cpp)
(compiled with gcc)

the bulk of the program consist in:
ex e("2*S.j+n", lst(S,j,n)); //(S is a symbol, j an idx, n a symbol)
cout << "ok! :" << e << endl;

I am getting the result:
ok! :2*S

which is wrong in my opinion.
Am I doing something wrong? Are there ways to get around this problem?
Thanks for your help
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