Hello, At the following page:
https://orgmode.org/worg/org-contrib/babel/languages/ob-doc-C.html // CC+ should be C++ :main can be set to "no" to inhibit wrapping of the code block in a main function call. :includes (C & CC+ only) accepts either a single string name, or a list of names of files to #include in the execution of the code block. // Spelling should be ‘explicitly' C++ needs to explicitely include either stdio.h or <iostream>