Clie
t端：i
cludestdiohi
cludesyssockethi
cludearpai
ethi
cludestdiohi
cludestdlibhi
cludestri
ghi
cludesyssockethi
cludearpai
ethi
cludeerr
ohi
clude
etdbhi
clude
eti
eti
hdefi
eBUFFSIZE20mai
i
t
receivedi
t
Socketcharbuf4096charsbuf4096structsockaddr_i
si

if
SocketsocketPF_INETSOCK_STREAM01perror