main_menu.h: In function ‘int csdnso_main(int,char**)’:
main_menu.h:1: error: previous declaration of ‘int csdnso_main(int, char**)’ with ‘C++’ linkage
main_menu.cpp:6: error: conflicts with new declaration with ‘C’ linkage
make: *** [main_menu.o] Error 1