calculator

Hello, I am trying to craete a calculator in autoit that will automatically calculate whatever is typed into it...

#NoTrayIcon
$result=""
while 1
$input=inputbox("Calculator","enter equation:",$result)
if @error then exit
$result=eval($input)
wend

Really simple, but...
This works great until you type in 1+1 and it returns "1+1", rather than 2.

So my question is, does anyone know how I can make this easier than defining every last mathematical function? Can I not make it automatically perform whatever function I need it to perform, and return the appropriate result?


Simon


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