I am trying to generate c code for a LinearAlgebra test problem using Maple:

But the output cannot be used due to the warning:

Warning, the function names {KroneckerProduct} are not recognized in the target language

The proposed code looks like:

I would ask, why is the value of the global variable changed in procedure?

for example, we first define a global A2 and a proc()
but the value of A2 is changed in proc()?

How to fix this error?