How do we obtain C source code for any built-in function in matlab?

We are finding it difficult to convert a matlab function in C. We tried the Matlab coder but somehow we were not able to run it successfully. We wanted C source codes for functions like floor,fft,length etc. Is there some other way in which this problem can be solved? Should we directly contact the Matlab authorities?

[Walter Roberson]

If I recall correctly the functions you name should all have complete source generated by MATLAB Coder.

[Jan]

Please explain "not able to run it successfully" with any details.

Answer 1

[Jan]

It is not clear currently, which problem you want to solve. The mentioned functions are built-in, such that you cannot obtain the source code. In consequence you cannot convert the source code to C, but why do you want to do this? The functions can be called through the Matlab libs, so what is the benefit of creating the C code and compiling them again?