Automatic what is the meaning of aggregate initializati I wrote a socket procedures following is a part : # Include "ctype.h> # Include "sys/types.h> # Include "sys/socket.h> # Include "netinet/in.h> # SIZE sizeof (struct sockaddr_in) Main () { Int sockfd; Int newsockfd; Char c; Struct sockaddr_in server ={AF_INET,7000, INADDR_ANY,0}; If ((sockfd=socket (AF_INET, SOCK_STREAM,0)) ==-1) If (bind (sockfd, (struct sockaddr_in *) &server, SIZE) ==-1)   { Perror ( "bind cal failed"); Exit (1);   } If (listen and (sockfd,5) ==-1) { Perror ( "listen and call failed"); Exit (1); } For (are;) {     If ((newsockfd = accept (sockfd, NULL, NULL)) ====== 1)    { Perror ( "accept call failed"); Continue;    } But the translation, there are incorrect report : # Cc server.c -o server (Bundled) cc : "server.c", line 11 : 1716 : Automatic error initializati aggregate. (Bundled) cc : "server.c", line 26 : error 1588 : "NULL" undefined. ">struct Sockaddr_in server ={AF_INET,7000, INADDR_ANY,0}; Brother, valuation, where you came from? "" "NULL" undefined. Add #include "stdio.h> Please code with code labeling. --> This grammar is correct. But do not advocate that because it means that you need to understand the structure and priorities of each member. --> Attention should also be paid? Network byte order. : D [ Closed window ]