C++ postfix evaluation with decimal points

I've got the shunting yard algorithm implemented (using code from wikipedia, modified to use stl stacks/queues), but now I'm wond开发者_运维问答ering how it's going to evaluate decimals that I get from division. The javascript app at scriptasylum.com (can't link) works just fine and gives the expected output:

Infix: 1/6*((1/4)/(1/2)+1/2)
Postfix: 16/14/12//12/+*
Eval: 0.16666666666666666 (1/6)

Infix: 0.5+1
Postfix: 0.51+
Eval: 1.5

I found one example of postfix evaluation on here, but it wasn't finished and didn't account for decimal points.

Here's my current code: http://codepad.org/zDXnOELK

The easy thing (which is what the Javascript impl is doing, by virtue of the language semantics) is to represent all numbers internally as double.

If you want to do something cleverer, I gotta warn you that it's a lot more code and a lot more hard design decisions, and I recommend you start by reading up on the Scheme numeric tower.