monitor program, Does it support c ++?

During the process of putting the makefile on the sd card, ds-5 says it needs a license. So first I try to compile using a free monitor program.

The 14.0 monitor program states that the c program / assemble language can be compiled into the system. If so, does c program also support c ++? Or do you only support c? I look forward to your reply. I would appreciate your reply.