Network Programming-UDP Communication (client)

[Cpp] // /// // UDPClient file # include ".. /common/InitSock. h "# include <stdio. h> CInitSock initSock; // initialize the Winsock database int main () {// create a set of characters SOCKET s =: socket (AF_INET, SOCK_DGRAM, IPPROTO_UDP ); if (s = INVALID_SOCKET) {printf ("Failed socket () % d \ n",: WSAGetLastError (); return 0 ;} // you can also call the bind function to bind a local address here. // otherwise, the system will automatically schedule the binding. // enter the remote address information sockaddr_in ad Dr; addr. sin_family = AF_INET; addr. sin_port = htons (4567); // Note: Enter the IP address of the machine on which the server program is located. // if your computer is not connected to the Internet, use 127.0.0.1 to add the server to the addr. sin_addr.S_un.S_addr = inet_addr ("127.0.0.1"); // send data char szText [] = "TCP Server Demo! \ R \ n ";: sendto (s, szText, strlen (szText), 0, (sockaddr *) & addr, sizeof (addr ));:: closesocket (s); return 0 ;}