Softwareentwicklung in C++ - ASC

225
10.2 Das DDD 289
226 /∗ Returns the number of cards that c u r r e n t l y are l y i n g on the
227 ∗ board with t h e i r back s i d e s up .
228 ∗ @return The actual number of cards that show t h e i r back s i d e s
229 ∗/
230 virtual uint32 getNumCardsBackSideUp ( ) const
231 {
232 return ( ( num rows ∗ num cols ) − num cards front side up ) ;
233 }
234
235 /∗ This method i s c a l l e d to put a card on the board . I f a card
236 ∗ already occupies the d e s i r e d place t h i s c a l l i s ignored .
237 ∗ Please note that the card has to be deleted then , because
238 ∗ the c a l l e r s r e l y on t h i s f a c t ! ( j u s t because exceptions are
239 ∗ not known yet )
240 ∗ A range−check has to be performed on the coordinates . I f they
241 ∗ are out of range the c a l l i s ignored and the card i s deleted ,
242 ∗ because c a l l e r s r e l y on t h i s f a c t ! ( j u s t because exceptions
243 ∗ are not known yet )
244 ∗ @param card A pointer to the card that has to be put on the
245 ∗ board . The card w i l l be deleted in the d e s t r u c t o r !
246 ∗ @param row The row , where the card has to be put .
247 ∗ @param c o l The column , where the card has to be put .
248 ∗/
249 virtual void putCardOnBoard (MemoryGameCard ∗ card ,
250 uint32 row , uint32 c o l ) ;
251 protected :
252 /∗ An i n t e r n a l convenience method used to obtain a card . I t
253 ∗ does not perform any checks because i t assumes that they
254 ∗ have already been performed before .
255 ∗ @param row The row of the d e s i r e d card .
256 ∗ @param c o l The column of the d e s i r e d card .
257 ∗/
258 MemoryGameCard ∗ internalGetCard ( uint32 row , uint32 c o l ) const
259 {
260 return ( static cast(
261 static cast(
262 row vector −>getElementAt ( row))−>getElementAt ( c o l ) ) ) ;
263 }
264 } ;
265
266
267 #endif // memory gameboard h
Dass es einen Vektor für die einzelnen Displayables der Reihenköpfe (Zeile
56) und Spaltenköpfe (Zeile 62) gibt, ist ja zu erwarten. Was aber soll im
Vektor in Zeile 69 bloß gehalten werden? Ganz einfach: Die Displayables, die
nach jeder Spielfeldzeile den Zeilenumbruch bewirken! Ansonsten wäre das
Spielfeld ja ziemlich lang und flach :-).
10.2.16 IntDisplayable
Die Klasse IntDisplayable, die hier vorgestellt wird, braucht eigentlich keine
besondere Erklärung:
1 // s i m p l e i n t d i s p l a y a b l e . h − a d i s p l a y a b l e f o r i n t e g r a l numbers
2
3 #ifndef s i m p l e i n t d i s p l a y a b l e h
4 #define s i m p l e i n t d i s p l a y a b l e h