Softwareentwicklung in C++ - ASC

10.2.13 GameCard
10.2 Das DDD 281
Die Basisklasse für unsere Spielkarte ist eine weitere kleine Variation der im
letzten Kapitel besprochenen Karten, die folgendermaßen aussieht:
1 // game card v3 . h − d e c l a r a t i o n o f a general card f o r games
2
3 #ifndef game card v3 h
4 #define game card v3 h
5
6 #include ” u s e r t y p e s . h”
7
8 //−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−
9 /∗ A general c l a s s of a card f o r games . I t has two s i d e s and can
10 ∗ be turned around . One way of turning i t i s to d e l i b e r a t e l y put
11 ∗ the f r o n t or the back s i d e up . The other way i s to f l i p the
12 ∗ card . This c l a s s does not handle any other information than
13 ∗ the v i s i b l e s i d e . I t has nothing to do with d i s p l a y
14 ∗ r e p r e s e n t a t i o n s and other s t u f f .
15 ∗/
16
17 class GameCard
18 {
19 protected :
20
21 /∗ Stores the s i d e of the card that i s v i s i b l e at the moment .
22 ∗/
23 uint8 v i s i b l e s i d e ;
24
25 public :
26
27 /∗ The f o l l o w i n g two constants d e f i n e the p o s s i b l e values f o r
28 ∗ the v i s i b l e s i d e of the card .
29 ∗/
30 static const uint8 FRONT SIDE = 0 x01 ;
31 static const uint8 BACK SIDE = 0x02 ;
32
33 /∗ Standard Constructor
34 ∗ @param v i s i b l e s i d e Has to be e i t h e r o f the two constants
35 ∗ defined above . The parameter i s checked f o r
36 ∗ v a l i d i t y and i f i t i s i n v a l i d the i n i t i a l l y
37 ∗ v i s i b l e s i d e i s the f r o n t s i d e .
38 ∗/
39 explicit GameCard( uint8 v i s i b l e s i d e ) :
40 v i s i b l e s i d e ( ( ( v i s i b l e s i d e == FRONT SIDE ) | |
41 ( v i s i b l e s i d e == BACK SIDE) ) ?
42 v i s i b l e s i d e : FRONT SIDE) {}
43
44 /∗ Copy Constructor
45 ∗ Implemented e x p l i c i t l y to make sure that i t cannot be
46 ∗ f o r g o t t e n in f uture changes .
47 ∗/
48 GameCard( const GameCard & s r c )
49 {
50 v i s i b l e s i d e = s r c . v i s i b l e s i d e ;
51 }
52
53 /∗ Destructor
54 ∗ Just to make sure that a v i r t u a l d e s t r u c t o r e x i s t s
55 ∗/
56 virtual ˜GameCard( ) { }
57
58 /∗ Turns the card to the other s i d e . No checks f o r the
59 ∗ v a l i d i t y of the stored s i d e are necessary because i t s
60 ∗ v a l i d i t y i s f u l l y guaranteed by the constructor and