Created an implementation and header file to check the user input, if it is entered through the GUI

includes/check_input.hpp

@@ -0,0 +1,27 @@
+#ifndef _CHECK_INPUT_H
+#define _CHECK_INPUT_H
+
+#include "includes/sock.hpp"
+
+typedef enum {M_SINGLE, M_CLIENT, M_SERVER} Mode;
+
+/* This struct contains a Mode enum, which indicates the type of game we are
+   playing (Single player, client mode or server mode). The netsock parameter is
+   a 'Sock' object - Client and Server classes inherit from this object, so this
+   parameter can be instantiated to either a client or server, depending on the
+   game type. */
+typedef struct {
+	Mode mode;
+	Sock* netsock;
+} GameType;
+
+/* This function checks the IP address and port passed to it, and returns a struct,
+that contains information about the game mode, and contains the server socket.
+TODO - Add better error checking. */
+GameType check_server(char* ip_text, char* port_text);
+
+/* NOT IMPLEMENTED YET - This function checks the code given to it, and returns a struct
+that contains information about the game mode, and contains the client socket. */
+GameType check_client(char* code);
+
+#endif