[JUSTINR]

I edit , but no working ...

#include < amxmodx >
#include < fun >
#include < zombie_plague_advance >
#include < hamsandwich >

new const g_chance = 120
new const g_access_flag[] = "a"

new g_gameid, g_maxplayers, cvar_minplayers, cvar_ratio, cvar_sniperhp, cvar_nemhp, g_msg_sync

public plugin_init( )
{
	register_plugin( "[ZP] Snipers VS Nemesis Mode","1.0", "zmd94" )
	RegisterHam( Ham_Spawn, "player", "zp_player_spawn_post", 1 ); 
	
	cvar_minplayers = register_cvar("zp_minplayers", "2")
	cvar_sniperhp =	  register_cvar("zp_sniper_hp", "1.5")
	cvar_nemhp =	  register_cvar("zp_nem_hp", "0.3")
	cvar_ratio = 	  register_cvar("zp_svn_inf_ratio", "0.4")
	
	g_maxplayers = get_maxplayers()
	g_msg_sync = CreateHudSyncObj()
}

public plugin_natives()
{
    register_native("zp_is_svn_round", "native_is_svn_round", 1)
}

public plugin_precache( )
{
	new access_flag = read_flags( g_access_flag )
	
	g_gameid = zp_register_game_mode( "Sniper vs Nemesis Mode", access_flag, g_chance, 0, ZP_DM_BALANCE )
}

public zp_player_spawn_post( id )
{
	if( zp_get_current_mode() == g_gameid )
	{
		if( zp_get_user_zombie( id ))
		{
			zp_make_user_nemesis( id )
			
			set_user_health( id, floatround(get_user_health(id) * get_pcvar_float(cvar_nemhp)) )
		}
		else
		{
			zp_make_user_sniper( id )
			
			set_user_health( id, floatround(get_user_health(id) * get_pcvar_float(cvar_sniperhp)) )
		}
	}
}

public zp_round_started_pre( game )
{
	if( game == g_gameid )
	{
		if( fn_get_alive_players() < get_pcvar_num(cvar_minplayers) )
		{
			return ZP_PLUGIN_HANDLED
		}
		start_svn_mode( )
	}
	return PLUGIN_CONTINUE
}

public zp_round_started( game, id )
{
	if( game == g_gameid )
	{
		set_hudmessage(221, 156, 21, -1.0, 0.17, 1, 0.0, 5.0, 1.0, 1.0, -1)
		ShowSyncHudMsg(0, g_msg_sync, "Snipers vs Nemesis Mode!")
	}
}

public zp_game_mode_selected( gameid, id )
{
	if( gameid == g_gameid )
		start_svn_mode( )

	return PLUGIN_CONTINUE
}

start_svn_mode( )
{
	static i_nemesiss, i_max_nemesiss, id, i_alive
	i_alive = fn_get_alive_players()
	id = 0
	
	i_max_nemesiss = floatround( ( i_alive * get_pcvar_float( cvar_ratio ) ), floatround_ceil )
	i_nemesiss = 0
	
	while (i_nemesiss < i_max_nemesiss)
	{
		if ( (++id) > g_maxplayers) id = 1
		
		if ( !is_user_alive(id) )
			continue;
		
		if (random_num(1, 5) == 1)
		{
			zp_make_user_nemesis(id)
			
			set_user_health( id, floatround(get_user_health(id) * get_pcvar_float(cvar_nemhp)) )
			
			i_nemesiss++
		}
	}
	
	for (id = 1; id <= g_maxplayers; id++)
	{
		if ( !is_user_alive(id) || zp_get_user_nemesis(id) )
			continue;
			
		zp_make_user_sniper(id)
		
		set_user_health( id, floatround(get_user_health(id) * get_pcvar_float(cvar_sniperhp)) )
	}
}

fn_get_alive_players( )
{
	static i_alive, id
	i_alive = 0
	
	for ( id = 1; id <= g_maxplayers; id++ )
	{
		if( is_user_alive( id ) )
			i_alive++
	}
	return i_alive;
}

public native_is_svn_round()
{
    return zp_get_current_mode() == g_gameid ? true : false
}