‘AF_BINARY_MUL’ was not declared in this scope

[Edmond Febrinicko Armay]

helloworld.cpp: In function ‘int main(int, char**)’:
helloworld.cpp:63:34: error: ‘AF_BINARY_MUL’ was not declared in this scope
   63 | af::array S = scan(r, 0, AF_BINARY_MUL);
      | ^~~~~~~~~~~~~
helloworld.cpp:63:23: error: ‘scan’ was not declared in this scope; did you mean ‘scanf’?
   63 | af::array S = scan(r, 0, AF_BINARY_MUL);
      | ^~~~
      | scanf

Arrayfire 3.3.2 is too old, so it doesn't have AF_BINARY_MUL. Since version 3.4, it has enum for some arithmetic operation. Please upgrade the package to latest version, 3.9.0.

Ref:
https://arrayfire.org/docs/defines_8h_source.htm#l00432&gsc.tab=0