[u3ber]

pawn Код:

stock GetPlayerpos(playerid,x,y,z)
{ //note the opening curly-bracket
    GetPlayerPos(playerid,x,y,z);
    GetPlayerPos(player2,x2,y2,z2);.
    new Float:distance=floatsqroot((x-x2)*(x-x2)+(y-y2)*(y-y2)+(z-z2)*(z-z2));
} //...and the closing