编译时出现这个警告
在server.c中包含的文件中：48：
unixwin.h：23：1：warning：重新定义“IPPROTO_TCP”在server.c中包含的文件中：42：/usr/include/netinet/in.h:45:1：warning：这是以前定义的位置
下面是错误中提到的部分：
file unixwin.h 15 16 #ifndef FALSE 17 #define FALSE 0 18 #endif 19 20 #define SOCKADDR_IN struct sockaddr_in 21 #define SOCKET_ERROR -1 22 #define INVALID_SOCKET (SOCKET)(~0) 23 #define IPPROTO_TCP 6 24 #define LPSOCKADDR struct sockaddr * 25 #define GMEM_MOVEABLE 1 26 #define GMEM_FIXED 2 27 #define GMEM_SHARE 3 28 #define GPTR 4 29 #define LPHOSTENT struct hostent * 30 #define LPIN_ADDR struct in_addr * 31 32 #ifndef UINT 33 #define UINT unsigned int 34 #endif 35 在文件server.c中
37 38 #ifdef UNIX 39 #include <sys/types.h> 40 #include <sys/socket.h> 41 #include <sys/ioctl.h> 42 #include <netinet/in.h> 43 #include <arpa/inet.h> 44 #include <time.h> 45 #ifndef FIONREAD 46 #include <sys/filio.h> 47 #endif 48 #include "unixwin.h" 49 #endif 50
并在文件/usr/include/netinet/in.h中
30 31 /* Standard well-defined IP protocols. */ 32 enum 33 { 34 IPPROTO_IP = 0, /* Dummy protocol for TCP. */ 35 #define IPPROTO_IP IPPROTO_IP 36 IPPROTO_HOPOPTS = 0, /* IPv6 Hop-by-Hop options. */ 37 #define IPPROTO_HOPOPTS IPPROTO_HOPOPTS 38 IPPROTO_ICMP = 1, /* Internet Control Message Protocol. */ 39 #define IPPROTO_ICMP IPPROTO_ICMP 40 IPPROTO_IGMP = 2, /* Internet Group Management Protocol. */ 41 #define IPPROTO_IGMP IPPROTO_IGMP 42 IPPROTO_IPIP = 4, /* IPIP tunnels (older KA9Q tunnels use 94). */ 43 #define IPPROTO_IPIP IPPROTO_IPIP 44 IPPROTO_TCP = 6, /* Transmission Control Protocol. */ 45 #define IPPROTO_TCP IPPROTO_TCP 46 IPPROTO_EGP = 8, /* Exterior Gateway Protocol. */ 47 #define IPPROTO_EGP IPPROTO_EGP 48 IPPROTO_PUP = 12, /* PUP protocol. */ 49 #define IPPROTO_PUP IPPROTO_PUP 50 IPPROTO_UDP = 17, /* User Datagram Protocol. */ 51 #define IPPROTO_UDP IPPROTO_UDP 52 IPPROTO_IDP = 22, /* XNS IDP protocol. */ 53 #define IPPROTO_IDP IPPROTO_IDP 54 IPPROTO_TP = 29, /* SO Transport Protocol Class 4. */ 55 #define IPPROTO_TP IPPROTO_TP 56 IPPROTO_IPV6 = 41, /* IPv6 header. */ 57 #define IPPROTO_IPV6 IPPROTO_IPV6 58 IPPROTO_ROUTING = 43, /* IPv6 routing header. */ 59 #define IPPROTO_ROUTING IPPROTO_ROUTING 60 IPPROTO_FRAGMENT = 44, /* IPv6 fragmentation header. */
你能说哪里的文字是错误的，谢谢