sample code of TCP server

original from http://x68000.q-e-d.net/~68user/net/sample/echo-server-1.c
modified comment
does not exit when gethostname fails
nocached is born!
refacor
improve output
implemented command
refactor: rename var
sample code of malloc
cache only one item!
猫Ｃ第9章　構造体
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猫C 構造体
猫C 構造体
猫C 構造体