chat\passwd
....\help.c
....\server
....\help.o
....\list.o
....\Makefile
....\client
....\group.o
....\main.h
....\regist.o
....\login.o
....\single.c
....\login.c
....\hello
....\regist.c
....\YY
....\yang
....\showuser.c
....\client.c
....\group.c
....\server.c
....\list.c
....\single.o
....\xiaoguang
....\showuser.o
....\sun
chat