Hello, Can someone tell me how to do simple math with TCC? I need to divide the height versus the width of PDF files, which I get from a "pdfinfo" utility. I need that ratio so that I can use it to make SVG files from the PDFs, at particular sizes. Thanks, Peter

One way is to use the %@EVAL function: Code: set aspect=%@eval[%height / %width] Or you can use SET /A, which works much like in CMD.EXE but without the octal support biting you at odd moments: Code: set /a aspect=%height / %width

Thanks. Thanks. Yeh, I've tried the "set /a" stuff in the command shell, but, it doesn't support floating numbers. I'll play with the eval thing. Thanks again!

CMD may not, but TCC's SET /A supports floats. Code: v:\> set /a float=8/3 2.6666666667 v:\> set /a float*=.5 1.3333333334 @EVAL just works better. Code: v:\> echo %@eval[8/3 * .5] 1.3333333333

Is it really any different? Code: C:\>set /a float=8 / 3 * .5 1.3333333333 C:\> It's probably the same engine under the hood. Rex isn't one to write two different routines to accomplish the same task.

Either I'd forgotten that, or I never knew it in the first place. In TCC, it does support floating point.

pb4072, @EVAL lets you do some pretty advanced math as well. It supports exponentiation, bit-manipulation operations, logarithms, trigonometric functions, etc., etc. Want to know what pi is out to 15,000 decimal places? It's got that covered. It's really quite a powerful function should you ever need any of those facilities. If I have any (very minor) gripe about it, it's that it has no particularly straightforward way to compute roots but I figured out how to get it to do those, too. You can do that by raising a number to the power of the reciprocal of the root you're trying to find. E.g., to find the cube root of n, use @EVAL[n**(1/3)].

You *could* create functions to do that if you need it often. Code: function SQR=`%@eval[%1 ** 0.5]` function ROOTn=`%@eval[%1 ** (1/%2)]` function Root=`%@eval[10**(log10(%1)/%2)]` echo Square root of 2=%@SQR[2],^ncubed root of 2=%@ROOTn[2,3]^nanother cubed root=%@Root[2,3] echo %@eval[ 2 * %@sqr[2]]

You don't even need to call %EVAL if you know you'll be in @EVAL anyway. Code: v:\> function root `(%1**(1/%2))` v:\> echo %@root[8,3] (8**(1/3)) v:\> echo %@eval[%@root[8,3]] 2