ok went back to working on my server side TCP/IP program.

so far I am able to create, listen, and connect from a client.

just having probs with what to do next.

my goal is the following:

1server running
2client connects
3server sends "8888" to show that it is connected and waiting to receive
4client sends a number to server
5server ack with sending "8888" for good, or "9999" for bad

then repeating 4-5, until client sends 0000 for exit

the following is the start of my program:

 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
 #include <windows.h>

 #pragma comment(lib,"ws2_32.lib") //Winsock Library

 //----- Defines ---------------------------------------------------------------
 #define  PORT_NUM   8888    // Arbitrary port number for the server

 int main(void)
   WSADATA wsaData;                      // Stuff for WSA functions
   int                  welcome_s;       // Welcome socket descriptor
   struct sockaddr_in   server_addr;     // Server Internet address
   int                  connect_s;       // Connection socket descriptor
   struct sockaddr_in   client_addr;     // Client Internet address
   struct in_addr       client_ip_addr;  // Client IP address
   int                  addr_len;        // Internet address length
   char                 out_buf[8];   // Output buffer for data
   char                 in_buf[8];    // Input buffer for data
   int                  retcode;         // Return code
  int number;

 // This stuff initializes winsock
  if (WSAStartup(MAKEWORD(2,0), &wsaData) != 0)
    fprintf(stderr,"Server: WSAStartup failed.\n", WSAGetLastError());
    printf("Server: WSAStartup Success.\n");
 // >>> Step #1 <<<
 // Create a welcome socket
 //   - AF_INET is Address Family Internet and SOCK_STREAM is streams

   welcome_s = socket(AF_INET, SOCK_STREAM, 0);
   if (welcome_s < 0)
    fprintf(stderr,"Server: Could not create socket.\n", WSAGetLastError());
    printf("Server: Socket Created.\n");

   // >>> Step #2 <<<
   // Fill-in server (my) address information and bind the welcome socket
 memset((char *)&server_addr,0,sizeof(server_addr)); //Clear server address
   server_addr.sin_family = AF_INET;                 // Address family to use
   server_addr.sin_port = htons(PORT_NUM);           // Port number to use
   server_addr.sin_addr.s_addr = htonl(INADDR_ANY);  // Listen on any IP address
    if (bind(welcome_s, (struct sockaddr *)&server_addr,sizeof(server_addr)) < 0)
    fprintf(stderr,"Server: bind() failed with error %d\n", WSAGetLastError());
    printf("Server: Socket bound.\n");

   // >>> Step #3 <<<
   // Listen on welcome socket for a connection
 listen(welcome_s, 1);
 // >>> Step #4 <<<
   // Accept a connection.  The accept() will block and then return with
   // connect_s assigned and client_addr filled-in.
 printf("Waiting for accept() to complete... \n");
   addr_len = sizeof(client_addr);
   connect_s = accept(welcome_s, (struct sockaddr *)&client_addr, &addr_len);
   if (connect_s < 0)
             fprintf(stderr,"Server: listen() failed with error %d\n", WSAGetLastError());
    printf("Server: listen() is OK.\n");
 // Copy the four-byte client IP address into an IP address structure
 memcpy(&client_ip_addr, &client_addr.sin_addr.s_addr, 4);
 // Print an informational message that accept completed
 printf("Accept completed (IP address of client = %s  port = %d) \n",
     inet_ntoa(client_ip_addr), ntohs(client_addr.sin_port));

where do I go with this now?

thank you