cc tcpstream.c
tcpstream.c: In function `usage':
tcpstream.c:89: error: missing terminating " character
tcpstream.c:90: error: `syn' undeclared (first use in this function)
tcpstream.c:90: error: (Each undeclared identifier is reported only once
tcpstream.c:90: error: for each function it appears in.)
tcpstream.c:90: error: stray '\' in program
tcpstream.c:90: error: missing terminating " character
tcpstream.c:91: error: parse error before "exit"
编译不通过阿。