How to use #inlcude <>? # is declared as an invalid character!

#include <stdio.h>   /* matlab tells me # is an invalid character, but i thougt it belongs there*/
#include <stdlib.h>   /* any suggestion? I am a mere beginner so it probably has a simple reason*/

int main()
{
    
}

Answer 1

[Walter Roberson]

MATLAB will not tell you that if your file extension is .c

[Walter Roberson]

I see you Unaccepted my Answer, so you must be looking for a different solution.

#include <stdio.h> /* matlab tells me # is an invalid character, but i know for fact that it belongs there*/

MATLAB permits the # character in the following contexts:

• In comments
• Inside '' character vectors
• Inside "" string scalars

The code you posted is C code (not even C++). MATLAB does not permit C code in .m (MATLAB) or .mlx (Live Script) files, except in the forms noted above. Instead if you need to #include a C header file inside MATLAB code, you need to use coder.cinclude() and you would call upon the functions using coder.ceval(); see https://www.mathworks.com/help/simulink/ug/incorporate-c-code-using-a-matlab-function-block.html

Simulink uses the same tools of coder.cinclude() and coder.ceval() inside MATLAB Function Blocks, and does not permit C code directly.

MATLAB permits linking to compiled C or C++ code, which would be stored in .c or .cpp or .C or .CPP files or .c++ or .C++ files, but not in .m files.

What is your evidence that "for certain" a #include statement belongs in a .m file ?

[Justus Fassnacht]

Thank you for awnsering.

I saw it used that way (without context in a Course on C) and thought it'd work.

This resolved all my issues.

(Sorry for beeing too certain)