linux网络编程头文件

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#include <iostream> using namespace std; #include <unistd.h> #include <sys/types.h> #include <sys/socket.h> #include <netdb.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <ctype.h> #include <errno.h> #include <malloc.h> #include <netinet/in.h> #include <arpa/inet.h> #include <sys/ioctl.h> #include <stdarg.h> #include <fcntl.h> #include <fcntl.h>   typedef struct pollfd FDLIST; int main() {   int fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);     sockaddr_in ladd;     ladd.sin_family = AF_INET;     ladd.sin_port = htons(123);     ladd.sin_addr.s_addr = 0;     if(bind(fd, (sockaddr*)&ladd, sizeof(ladd)) == 0)   {   }     cout << "Hello, World!" << endl;     return 0; }