Most relevant header files from the NEMO C libraries have been made entrant for C++. This means that all routines should be available through:
extern "C" {
.....
}
The only requirement is of course that the main() be in C++. For this you have to link with the NEMO++ library before the regular NEMO library. So, assuming your header (-I) and library (-L) include flags have been setup, you should be able to compile your C++ programs as follows:
% cppc -g -o test test.cc -lnemo++ -lnemo -lm