1 #include <sys/types.h> 2 #include <sys/param.h> 3 #include <sys/socket.h> 4 #include <netinet/in.h> 5 #include <unistd.h> 6 main(void)7 int main(void) { 8 int s; 9 10 s =socket(AF_INET, SOCK_STREAM, 0); 11 return(close(s)); 12 } 13