how to correct this code?

// advanced NVG
class CItemNVG : public CItem
{
void Spawn( void )
{
Precache( );
SET_MODEL(ENT(pev), "models/w_longjump.mdl"); // you''ll want to change this
CItem::Spawn( );
}
void Precache( void )
{
PRECACHE_MODEL("models/w_longjump.mdl"); // you''ll want to change this
PRECACHE_SOUND("buttons/blip1.wav");
}
BOOL MyTouch( CBasePlayer *pPlayer )
{
if ( pPlayer->m_fNVG ) // does the player already have it
{
return FALSE; // if so, quit
}

if ( ( pPlayer->pev->weapons & (1<
{//error here 
pPlayer->m_fNVG = TRUE; // player now has night vision goggles

// make the client.dll print out the symbol on ammo history
MESSAGE_BEGIN( MSG_ONE, gmsgItemPickup, NULL, pPlayer->pev );
WRITE_STRING( STRING(pev->classname) );
MESSAGE_END();

// play a sound to tell the player he''s picked up the NVG
EMIT_SOUND(pPlayer->edict(), CHAN_WEAPON, "buttons/blip1.wav", 0.8, ATTN_NORM );
return TRUE;
}
return FALSE;
}// error here
};

LINK_ENTITY_TO_CLASS( item_nvg, CItemNVG );
// advanced NVG

1>\dlls\items.cpp(387): error C2958: the left parenthesis '(' found at '\dlls\items.cpp(373)' was not matched correctly
1>\dlls\items.cpp(388): error C2969: syntax error : ';' : expected member function definition to end with '}'
1>\dlls\items.cpp(390): error C2059: syntax error : 'string'
1>\dlls\items.cpp(390): error C2238: unexpected token(s) preceding ';'
1>\dlls\items.cpp(392): fatal error C1004: unexpected end-of-file found