How do I convert simulink-projects to functional C-code?

Hello! Im working on a project where I'm trying to convert my simulink project into c-code. When doing this with the grt simulink generates several .c-files and .h-files, I also get an executable that generates a .mat file when executed.

I am really new to this but basically what I want to do is to be able to have two inputs into the c-program, and then generate the output into a file that can be read without having access to MATLAB. Can this be achieved by making changes in the simulink-project or do I have to make modifications in the generated c-code?

Thank you!