C实现的MUD,对大家基本入门网络游戏很有帮助!

				// char.c
				
				#pragma save_binary
				
				#include 
				#include 
				#include 
				#include 
				#include 
				#include 
				#include 
				#include 
				#include 
				#include 
				
				inherit F_ACTION;
				inherit F_ALIAS;
				inherit F_APPRENTICE;
				inherit F_ATTACK;
				inherit F_ATTRIBUTE;
				inherit F_COMMAND;
				inherit F_CONDITION;
				inherit F_DAMAGE;
				inherit F_DBASE;
				inherit F_EDIT;
				inherit F_FINANCE;
				inherit F_MESSAGE;
				inherit F_MORE;
				inherit F_MOVE;
				inherit F_NAME;
				inherit F_SKILL;
				inherit F_TEAM;
				
				// Use a tick with longer period than heart beat to save cpu's work
				static int tick;
				
				void create()
				{
					seteuid(0); // so LOGIN_D can export uid to us
				}
				
				// Use this function to identify if an object is a character.
				int is_character() { return 1; }
				
				// setup: used to configure attributes that aren't known by this_object()
				// at create() time such as living_name (and so can't be done in create()).
				void setup()
				{
					seteuid(getuid(this_object()));
				
					set_heart_beat(1);
					tick = 5 + random(10);
					enable_player();
				
					CHAR_D->setup_char( this_object() );
				}
				
				void heart_beat()
				{
					int wimpy_ratio, cnd_flag;
					mapping my;
					object ob;
				
					my = query_entire_dbase();
				
					// If we are dying because of mortal wounds?
					if( my["eff_qi"] < 0 || my["eff_jing"] < 0) {
						remove_all_enemy();
						die();
						return;
					}
				
					// If we're dying or falling unconcious?
					if( my["qi"] < 0 || my["jing"] < 0) {
						remove_all_enemy();
						if( !living(this_object()) ) die();
						else unconcious();
						return;
					}
				
					// Do attack if we are fighting.
					if( is_busy() ) {
						continue_action();
						// We don't want heart beat be halt eventually, so return here.
						return;
					} else {
						// Is it time to flee?
						if( is_fighting()
						&&	intp(wimpy_ratio = (int)query("env/wimpy"))
						&&	wimpy_ratio > 0
						&&	(	my["qi"] * 100 / my["max_qi"] 							||	my["jing"] * 100 / my["max_jing"] 							GO_CMD->do_flee(this_object());
						// Do attack or clean up enemy if we have fleed.
						attack();
					}
				
					if( !userp(this_object()) ) {
						this_object()->chat();
						// chat() may do anything -- include destruct(this_object())
						if( !this_object() ) return;	
					}
				
					if( tick--  ) return;
					else tick = 5 + random(10);
				
					cnd_flag = update_condition();
				
					// If we are compeletely in peace, turn off heart beat.
					// heal_up() must be called prior to other two to make sure it is called
					// because the && operator is lazy :P
					if( ((cnd_flag & CND_NO_HEAL_UP) || !heal_up())
					&&	!is_fighting() 
					&&	!interactive(this_object())) {
						if( environment() ) {
							ob = first_inventory(environment());
							while(ob && !interactive(ob))
								ob = next_inventory(ob);
						}
						if( !ob ) set_heart_beat(0);
					}
				
					if( !interactive(this_object()) ) return;
				
					// Make us a bit older. Only player's update_age is defined.
					// Note: update_age() is no need to be called every heart_beat, it
					//       remember how much time has passed since last call.
					this_object()->update_age();
				
					if(query_idle(this_object()) > IDLE_TIMEOUT && !wizardp(this_object()))
						this_object()->user_dump(DUMP_IDLE);
				}
				
				int visible(object ob)
				{
					int lvl, invis;
				
					lvl = wiz_level(this_object());
				
					if( lvl > wiz_level(ob) ) return 1;
					if(wizardp(ob)) invis = (int)ob->query("env/invisibility");
					else invis=0;
					if( intp(invis) && (invis > lvl) ) return 0;
				
					if( ob->is_ghost() ) {
						if( is_ghost() ) return 1;
						if( query_temp("apply/astral_vision") ) return 1;
						return 0;
					}
					return 1;
				}