socket in c++

[Hector Yuen <hyuen@xxxxxxxxxxxxxxxx>]

hello, I am trying to make an IPv6 socket on c++, on linux, I first tried
the C version, and works fine, but I want to make a class or something to
make things easier, so I renamed the file sock.c to sock.cpp, and tried to
compile it with:
gcc sock.cpp -lnsl -lsocket -o sock
well, with the c version works, but here it displays a lot of errors, what
is happening?