Hello,



*** UPDATE***

I made some homework and changed the question, to be straight forward.

I run the below code in both Zorro and Microsoft Visual Studio C:



On Zorro I got:


On VC and a calculator, I got:


It seems that Zorro used float calculation, it's not clear to me why?


Thanks
David

You can easily solve that mystery by printing a bit more:

printf("\n %.10e %.10e %.10e",a1,a2,(a1-a2)/a2);

Floating point arithmetic happens on your CPU hardware, so you will always get the same result with the same numbers, no matter what compiler you use. But with slightly different numbers you get slightly different results. It's the precompiler that interprets your constants which is different. See: https://zorro-project.com/manual/en/aarray.htm

Thank you for your reply.

It's an honor for me that a very qualified and intelligent person like you, replied to my question.

I apologize but not really understood your answer.

I read carefully the manual, and then updated the post, so the question in the top is after reading the manual.

I run this code on Microsoft Visual Studio:


Please see the attached VC results

I run this code on Phyton:


Please see the attached Python results.

I run this calculation on RStudio and got the attached file.

I run this calculation on PC's calculator and got the attached file.

I don't understand why coding with 4 different languages/application provide the same results, but Zorro result differs?

Thanks
David

It's because you wrote your Zorro script in Lite-C.
https://zorro-project.com/manual/en/aarray.htm

Zorro also supports C++ scripting, where you will not have to deal with the eccentricities of Lite-C and its compiler.
https://zorro-project.com/manual/en/dlls.htm

Thank you AndrewAMD, I'll try run it with C++

David

I found the problem

The manual says:



So, I changed the code to:


Got the desired results:



Thanks
David