Mathematica Experts: Convert Expression to C++ Code

[LordV]

Hi all,

here is a question for mathematica experts(or not )

I have an expression of the form:

-6615. y[0] + 282.72 y[0]^3 + 1.3244 y[0]^5 - 0.002624 y[0]^7 -
178.28 y[1] + 152.912 y[0]^2 y[1]-((1309.5 y[0]^3 y[1]^4)/(y[0]^2 + y[1]^2)^4)...

and I want to transfer this expression to my C++ code.

I need a way to transform for example this: y[0]^5(and anything similar) into this pow(y[0],5) to copy and paste in my code(I can't do it manual because the expression is quite large). Is it plausible?

thanks

PS. I tried CForm. It does a good work but it changes [ and ] to ( and ).

 

[LordV]

Hmmm, I think I did it(although I am sure there is a more elegant way).
First I used
CForm[expresion] /. Power -> pow

and the I used the output as a string and I used:

StringReplace["output",{"y0" -> "y[0]", "y1" -> "y[1]", "y2" -> "y[2]", "y3" -> "y[3]"}]

 

[oswaler]

I understand the need for efficient and accurate code conversion, especially when dealing with large expressions. Mathematica is a powerful tool for symbolic computation, but it may not always provide the exact code format that is needed for specific programming languages.

In this case, it seems like the CForm function in Mathematica could be a good starting point for converting the expression into C++ code. However, as mentioned in the question, it does not replace the square brackets with the desired pow() function. In order to achieve this, you may need to write a custom function that specifically targets the y[0] and y[1] terms and replaces them with the pow() function.

Another option could be to use the Wolfram Language Compiler, which allows for direct conversion of Mathematica code into C++ code. This may be a more efficient and accurate way to convert the expression, but it would require some familiarity with the Wolfram Language and the compiler itself.

Overall, while it may take some effort to convert the expression into the desired C++ code format, it is definitely plausible and can be achieved with some creativity and use of available tools. I hope this helps and good luck with your coding!