/* ECP: FILEname=fig11_24.c */
/* 1*/   /* Find The Best Move, And return Its Value */
/* 2*/   /* Assumes: Humanwin < Draw < Computerwin */

/* 3*/   int
/* 4*/   ChooseMove( BoardType B, Side S, int *BestRow, int *BestColumn )
/* 5*/   {
/* 6*/       Side Opp;                              /* The Opponent */
/* 7*/       int Reply;                /* Value Of Opponent's Reply */
/* 8*/       int Value;               /* Value Of Best Move, So Far */
/* 9*/       Piece Mypiece;        /* Piece Corresponding To Side S */
/*10*/       int Row, Column;                           /* Counters */
/*11*/       int Z;                                  /* Placeholder */
/*12*/       int SimpleEval;       /* Result Of A Simple Evaluation */

/*13*/       if( ( SimpleEval = Terminal( B ) ) != Unclear )
/*14*/           return SimpleEval; /* Immediate Win, Lose, Or Draw */

/*15*/           /* Set Some Variables Depending On Who S Is */
/*16*/       if( S == Me )
/*17*/       {
/*18*/           Opp = You; Value = HumanWin; Mypiece = Computer;
/*19*/       }
/*20*/       else
/*21*/       {
/*22*/           Opp = Me; Value = ComputerWin; Mypiece = Human;
/*23*/       }

/*24*/           /* Search for A Move */
/*25*/       for( Row = 0; Row < Bsize; Row++ )
/*26*/           for( Column = 0; Column < Bsize; Column++ )
/*27*/               if( IsEmpty( B, Row, Column ) )
/*28*/               {
/*29*/                   Place( B, Row, Column, Mypiece );
/*30*/                   Reply = ChooseMove( B, Opp, &Z, &Z );
/*31*/                   Unplace( B, Row, Column );

/*32*/                      /* Test if S Gets A Better Position */
/*33*/                      /* If So, Update */
/*34*/                   if( S == Me && Reply > Value ||
/*35*/                       S == You && Reply < Value )
/*36*/                   {
/*37*/                       Value = Reply;
/*38*/                       *BestRow = Row; *BestColumn = Column;
/*39*/                   }
/*40*/               }

/*41*/       return Value;
/*42*/   }