CP socket programming C/C ++ implementation (Windows Platform SDK)

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C language TCP Program Hello world in. I used to use OO language all the time. Now I use C language to write and play games. I can't bend my mind. O (∩ _ ∩) o...
Server:

# Pragma comment (Lib, "ws2_32.lib ")

# Include <winsock2.h>

# Include <stdio. h>



Void main ()

{

// Version negotiation

Word wversionrequested;

Wsadata;

Int err;



Wversionrequested = makeword (0101); // 0 x

Err = wsastartup (wversionrequested, & wsadata );

If (Err! = 0)

{

Return;

}



If (lobyte (wsadata. wversion )! = 1 | hibyte (wsadata. wversion )! = 1)

// Wsadata. wversion! = 0x0101

{

Wsacleanup ();

Return;

}

// Create a socket

Socket socksvr = socket (af_inet, sock_stream, 0 );

// Create an IP address and port

Sockaddr_in addrsvr;

Addrsvr. sin_addr.s_un.s_addr = htonl (inaddr_any );

Addrsvr. sin_family = af_inet;

Addrsvr. sin_port = htons (6000 );

// Bind a port listener

BIND (socksvr, (sockaddr *) & addrsvr, sizeof (sockaddr ));

Listen (socksvr, 5 );



Sockaddr_in addrclient;

Int Len = sizeof (sockaddr );

While (true)

{

// Blocking method to obtain a client socket connection

Socket sockconn = accept (socksvr, (sockaddr *) & addrclient, & Len );

Char sendbuffer [128];

Sprintf (sendbuffer, "welcom % s! ", Inet_ntoa (addrclient. sin_addr ));

// Send data to the customer's socket

Send (sockconn, sendbuffer, strlen (sendbuffer) + 1, 0 );

Char recvbuffer [128];

// Accept data from the customer SOC

Recv (sockconn, recvbuffer, 0 );

Printf ("% s \ n", recvbuffer );

// Close the socket

Closesocket (sockconn );

}

Closesocket (socksvr );

// Release Winsock Resources

Wsacleanup ();

}

Client:

# Pragma comment (Lib, "ws2_32.lib ")

# Include <winsock2.h>

# Include <stdio. h>



Void main ()

{

// Version negotiation

Word wversionrequested;

Wsadata;

Int err;



Wversionrequested = makeword (0101); // 0 x

Err = wsastartup (wversionrequested, & wsadata );

If (Err! = 0)

{

Return;

}



If (lobyte (wsadata. wversion )! = 1 | hibyte (wsadata. wversion )! = 1)

// Wsadata. wversion! = 0x0101

{

Wsacleanup ();

Return;

}

// Create a socket connecting to the server

Socket sock = socket (af_inet, sock_stream, 0 );

// Create an address

Sockaddr_in hostaddr;

Hostaddr. sin_addr.s_un.s_addr = inet_addr ("127.0.0.1 ");

Hostaddr. sin_family = af_inet;

Hostaddr. sin_port = htons (6000 );

// Connect to the server

Connect (sock, (sockaddr *) & hostaddr, sizeof (sockaddr ));



Char revbuf [128];

// Obtain data from the server

Recv (sock, revbuf, 0 );

Printf ("% s \ n", revbuf );

// Send data to the server

Send (sock, "Hello host! ", 12, 0 );

Closesocket (sock );

}