Commit | Line | Data |
---|---|---|
feeca497 KA |
1 | |
2 | #include <stdio.h> | |
3 | #include "deck.h" | |
4 | #include "cribbage.h" | |
5 | ||
6 | ||
7 | #define NTV 10 /* number scores to test */ | |
8 | ||
9 | /* score to test reachability of, and order to test them in */ | |
10 | int tv[ NTV ] = { 8, 7, 9, 6, 11, 12, 13, 14, 10, 5 }; | |
11 | ||
12 | ||
13 | /* | |
14 | * computer chooses what to play in pegging... | |
15 | * only called if no playable card will score points | |
16 | */ | |
17 | ||
18 | cchose( h, n, s ) | |
19 | ||
20 | CARD h[]; | |
21 | int n; | |
22 | int s; | |
23 | { | |
24 | register int i, j, l; | |
25 | ||
26 | if( n <= 1 ) return( 0 ); | |
27 | if( s < 4 ) { /* try for good value */ | |
28 | if( ( j = anysumto(h, n, s, 4) ) >= 0 ) return( j ); | |
29 | if( ( j = anysumto(h, n, s, 3) ) >= 0 && s == 0 ) | |
30 | return( j ); | |
31 | } | |
32 | if( s > 0 && s < 20 ) { | |
33 | for( i = 1; i <= 10; i++ ) { /* try for retaliation to 31 */ | |
34 | if( ( j = anysumto(h, n, s, 21-i) ) >= 0 ) { | |
35 | if( ( l = numofval(h, n, i) ) > 0 ) { | |
36 | if( l > 1 || VAL( h[j].rank ) != i ) return( j ); | |
37 | } | |
38 | } | |
39 | } | |
40 | } | |
41 | if( s < 15 ) { | |
42 | for( i = 0; i < NTV; i++ ) { /* for retaliation after 15 */ | |
43 | if( ( j = anysumto(h, n, s, tv[i]) ) >= 0 ) { | |
44 | if( ( l = numofval(h, n, 15-tv[i]) ) > 0 ) { | |
45 | if( l > 1 || VAL( h[j].rank ) != 15-tv[i] ) return( j ); | |
46 | } | |
47 | } | |
48 | } | |
49 | } | |
50 | j = -1; | |
51 | for( i = n - 1; i >= 0; --i ) { /* remember: h is sorted */ | |
52 | l = s + VAL( h[i].rank ); | |
53 | if( l > 31 ) continue; | |
54 | if( l != 5 && l != 10 && l != 21 ) { | |
55 | j = i; | |
56 | break; | |
57 | } | |
58 | } | |
59 | if( j >= 0 ) return( j ); | |
60 | for( i = n - 1; i >= 0; --i ) { | |
61 | l = s + VAL( h[i].rank ); | |
62 | if( l > 31 ) continue; | |
63 | if( j < 0 ) j = i; | |
64 | if( l != 5 && l != 21 ) { | |
65 | j = i; | |
66 | break; | |
67 | } | |
68 | } | |
69 | return( j ); | |
70 | } | |
71 | ||
72 | ||
73 | ||
74 | /* | |
75 | * evaluate and score a player hand or crib | |
76 | */ | |
77 | ||
78 | plyrhand( hand, s ) | |
79 | ||
80 | CARD hand[]; | |
81 | char *s; | |
82 | { | |
83 | register int i, j; | |
84 | BOOLEAN win; | |
85 | ||
86 | printf( "Your %s is: ", s ); | |
87 | prhand( hand, CINHAND, TRUE ); | |
88 | printf( " [" ); | |
89 | printcard( turnover, TRUE ); | |
90 | printf( "]. How many points? " ); | |
91 | i = scorehand( hand, turnover, CINHAND, FALSE ); /* count */ | |
92 | if( ( j = number(0, 29) ) == 19 ) j = 0; | |
93 | if( i != j ) { | |
94 | if( i < j ) { | |
95 | win = chkscr( &pscore, i ); | |
96 | printf( "It's really only %d points, I get %d.\n", i, 2 ); | |
97 | if( !win ) win = chkscr( &cscore, 2 ); | |
98 | } | |
99 | else { | |
100 | win = chkscr( &pscore, j ); | |
101 | printf( "You should have taken %d, not %d!\n", i, j ); | |
102 | } | |
103 | if( explain ) { | |
104 | printf( "Explanation: %s\n", expl ); | |
105 | } | |
106 | } | |
107 | else { | |
108 | win = chkscr( &pscore, i ); | |
109 | } | |
110 | return( win ); | |
111 | } | |
112 | ||
113 | ||
114 | ||
115 | /* | |
116 | * handle scoring and displaying the computers hand | |
117 | */ | |
118 | ||
119 | comphand( h, s ) | |
120 | ||
121 | CARD h[]; | |
122 | char *s; | |
123 | { | |
124 | register int j; | |
125 | ||
126 | j = scorehand( h, turnover, CINHAND, FALSE ); | |
127 | printf( "My %s ( ", s ); | |
128 | prhand( h, CINHAND, TRUE ); | |
129 | printf( " [" ); | |
130 | printcard( turnover, TRUE ); | |
131 | printf( "] ) scores %d.\n", (j == 0 ? 19 : j) ); | |
132 | return( chkscr( &cscore, j ) ); | |
133 | } | |
134 | ||
135 | ||
136 | ||
137 | /* | |
138 | * add inc to scr and test for > glimit | |
139 | */ | |
140 | ||
141 | chkscr( scr, inc ) | |
142 | ||
143 | int *scr, inc; | |
144 | { | |
145 | return( ( (*scr += inc) >= glimit ? TRUE : FALSE ) ); | |
146 | } | |
147 | ||
148 | ||
149 | ||
150 | /* | |
151 | * cdiscard -- the computer figures out what is the best discard for | |
152 | * the crib and puts the best two cards at the end | |
153 | */ | |
154 | ||
155 | cdiscard( mycrib ) | |
156 | ||
157 | BOOLEAN mycrib; | |
158 | { | |
159 | CARD d[ CARDS ], h[ FULLHAND ], cb[ 2 ]; | |
160 | register int i, j, k; | |
161 | int nc, ns; | |
162 | long sums[ 15 ]; | |
163 | static int undo1[15] = {0,0,0,0,0,1,1,1,1,2,2,2,3,3,4}; | |
164 | static int undo2[15] = {1,2,3,4,5,2,3,4,5,3,4,5,4,5,5}; | |
165 | ||
166 | makedeck( d ); | |
167 | nc = CARDS; | |
168 | for( i = 0; i < knownum; i++ ) { /* get all other cards */ | |
169 | remove( known[i], d, nc-- ); | |
170 | } | |
171 | for( i = 0; i < 15; i++ ) sums[i] = 0L; | |
172 | ns = 0; | |
173 | for( i = 0; i < (FULLHAND - 1); i++ ) { | |
174 | cb[0] = chand[i]; | |
175 | for( j = i + 1; j < FULLHAND; j++ ) { | |
176 | cb[1] = chand[j]; | |
177 | for( k = 0; k < FULLHAND; k++ ) h[k] = chand[k]; | |
178 | remove( chand[i], h, FULLHAND ); | |
179 | remove( chand[j], h, FULLHAND - 1 ); | |
180 | for( k = 0; k < nc; k++ ) { | |
181 | sums[ns] += scorehand( h, d[k], CINHAND, TRUE ); | |
182 | if( mycrib ) sums[ns] += adjust( cb, d[k] ); | |
183 | else sums[ns] -= adjust( cb, d[k] ); | |
184 | } | |
185 | ++ns; | |
186 | } | |
187 | } | |
188 | j = 0; | |
189 | for( i = 1; i < 15; i++ ) if( sums[i] > sums[j] ) j = i; | |
190 | for( k = 0; k < FULLHAND; k++ ) h[k] = chand[k]; | |
191 | remove( h[ undo1[j] ], chand, FULLHAND ); | |
192 | remove( h[ undo2[j] ], chand, FULLHAND - 1 ); | |
193 | chand[4] = h[ undo1[j] ]; | |
194 | chand[5] = h[ undo2[j] ]; | |
195 | } | |
196 | ||
197 | ||
198 | ||
199 | /* | |
200 | * returns true if some card in hand can be played without exceeding 31 | |
201 | */ | |
202 | ||
203 | anymove( hand, n, sum ) | |
204 | ||
205 | CARD hand[]; | |
206 | int n; | |
207 | int sum; | |
208 | { | |
209 | register int i, j; | |
210 | ||
211 | if( n < 1 ) return( FALSE ); | |
212 | j = hand[0].rank; | |
213 | for( i = 1; i < n; i++ ) { | |
214 | if( hand[i].rank < j ) j = hand[i].rank; | |
215 | } | |
216 | return( sum + VAL( j ) <= 31 ); | |
217 | } | |
218 | ||
219 | ||
220 | ||
221 | /* | |
222 | * anysumto returns the index (0 <= i < n) of the card in hand that brings | |
223 | * the s up to t, or -1 if there is none | |
224 | */ | |
225 | ||
226 | anysumto( hand, n, s, t ) | |
227 | ||
228 | CARD hand[]; | |
229 | int n; | |
230 | int s, t; | |
231 | { | |
232 | register int i; | |
233 | ||
234 | for( i = 0; i < n; i++ ) { | |
235 | if( s + VAL( hand[i].rank ) == t ) return( i ); | |
236 | } | |
237 | return( -1 ); | |
238 | } | |
239 | ||
240 | ||
241 | ||
242 | ||
243 | /* | |
244 | * return the number of cards in h having the given rank value | |
245 | */ | |
246 | ||
247 | numofval( h, n, v ) | |
248 | ||
249 | CARD h[]; | |
250 | int n; | |
251 | int v; | |
252 | { | |
253 | register int i, j; | |
254 | ||
255 | j = 0; | |
256 | for( i = 0; i < n; i++ ) { | |
257 | if( VAL( h[i].rank ) == v ) ++j; | |
258 | } | |
259 | return( j ); | |
260 | } | |
261 | ||
262 | ||
263 | ||
264 | /* | |
265 | * makeknown remembers all n cards in h for future recall | |
266 | */ | |
267 | ||
268 | makeknown( h, n ) | |
269 | ||
270 | CARD h[]; | |
271 | int n; | |
272 | { | |
273 | register int i; | |
274 | ||
275 | for( i = 0; i < n; i++ ) { | |
276 | known[ knownum++ ] = h[i]; | |
277 | } | |
278 | } | |
279 |