2、7、8、11算24点用加减乘除四种运算符号把2、7、8、11算出得数24（每个数字不得重算或遗漏）有几种算法,都写出来啊··急啊···

2×(11+8-7)=24

11+8+7-2=24
(8-2)*(11-7)=24

7+8+11-2

（11-7）*（8-2）=24

1:(2 脳 7 - 11) 脳 8
2:((2 脳 7) - 11) 脳 8
3:(2 - 8) 脳 (7 - 11)
4:2 脳 (8 - 7 + 11)
5:2 脳 ((8 - 7) + 11)
6:2 脳 (8 - (7 - 11))
7:2 脳 (8 + 11 - 7)
8:2 脳 ((8 + 11) - 7)
9:2 脳 (8 + (11 - 7))
10:2 脳 (11 - 7 + 8)
11:2 脳 ((11 - 7) + 8)
12:2 脳 (11 - (7 - 8))
13:2 脳 (11 + 8 - 7)
14:2 脳 ((11 + 8) - 7)
15:2 脳 (11 + (8 - 7))
16:7 - 2 + 8 + 11
17:(7 - 2) + 8 + 11
18:(7 - 2 + 8) + 11
19:((7 - 2) + 8) + 11
20:7 - 2 +(8 + 11)
21:(7 - 2) + (8 + 11)
22:(7 - (2 - 8)) + 11
23:7 - (2 - 8) + 11
24:7 - (2 - (8 + 11))
25:7 - (2 - 8 - 11)
26:7 - ((2 - 8) - 11)
27:7 - 2 + 11 + 8
28:(7 - 2) + 11 + 8
29:(7 - 2 + 11) + 8
30:((7 - 2) + 11) + 8
31:7 - 2 +(11 + 8)
32:(7 - 2) + (11 + 8)
33:(7 - (2 - 11)) + 8
34:7 - (2 - 11) + 8
35:7 - (2 - (11 + 8))
36:7 - (2 - 11 - 8)
37:7 - ((2 - 11) - 8)
38:(7 脳 2 - 11) 脳 8
39:((7 脳 2) - 11) 脳 8
40:7 + 8 - 2 + 11
41:(7 + 8) - 2 + 11
42:(7 + 8 - 2) + 11
43:((7 + 8) - 2) + 11
44:(7 + (8 - 2)) + 11
45:7 + (8 - 2) + 11
46:7 + (8 - 2 + 11)
47:7 + ((8 - 2) + 11)
48:7 + (8 - (2 - 11))
49:7 + 8 -(2 - 11)
50:(7 + 8) - (2 - 11)
51:7 + 8 + 11 - 2
52:(7 + 8) + 11 - 2
53:(7 + 8 + 11) - 2
54:((7 + 8) + 11) - 2
55:(7 + (8 + 11)) - 2
56:7 + (8 + 11) - 2
57:7 + (8 + 11 - 2)
58:7 + ((8 + 11) - 2)
59:7 + (8 + (11 - 2))
60:7 + 8 +(11 - 2)
61:(7 + 8) + (11 - 2)
62:7 + 11 - 2 + 8
63:(7 + 11) - 2 + 8
64:(7 + 11 - 2) + 8
65:((7 + 11) - 2) + 8
66:(7 + (11 - 2)) + 8
67:7 + (11 - 2) + 8
68:7 + (11 - 2 + 8)
69:7 + ((11 - 2) + 8)
70:7 + (11 - (2 - 8))
71:7 + 11 -(2 - 8)
72:(7 + 11) - (2 - 8)
73:(7 - 11) 脳 (2 - 8)
74:7 + 11 + 8 - 2
75:(7 + 11) + 8 - 2
76:(7 + 11 + 8) - 2
77:((7 + 11) + 8) - 2
78:(7 + (11 + 8)) - 2
79:7 + (11 + 8) - 2
80:7 + (11 + 8 - 2)
81:7 + ((11 + 8) - 2)
82:7 + (11 + (8 - 2))
83:7 + 11 +(8 - 2)
84:(7 + 11) + (8 - 2)
85:8 - 2 + 7 + 11
86:(8 - 2) + 7 + 11
87:(8 - 2 + 7) + 11
88:((8 - 2) + 7) + 11
89:8 - 2 +(7 + 11)
90:(8 - 2) + (7 + 11)
91:(8 - (2 - 7)) + 11
92:8 - (2 - 7) + 11
93:8 - (2 - (7 + 11))
94:8 - (2 - 7 - 11)
95:8 - ((2 - 7) - 11)
96:8 脳 (2 脳 7 - 11)
97:8 脳 ((2 脳 7) - 11)
98:8 - 2 + 11 + 7
99:(8 - 2) + 11 + 7
100:(8 - 2 + 11) + 7
101:((8 - 2) + 11) + 7
102:8 - 2 +(11 + 7)
103:(8 - 2) + (11 + 7)
104:(8 - (2 - 11)) + 7
105:8 - (2 - 11) + 7
106:8 - (2 - (11 + 7))
107:8 - (2 - 11 - 7)
108:8 - ((2 - 11) - 7)
109:(8 - 2) 脳 (11 - 7)
110:8 + 7 - 2 + 11
111:(8 + 7) - 2 + 11
112:(8 + 7 - 2) + 11
113:((8 + 7) - 2) + 11
114:(8 + (7 - 2)) + 11
115:8 + (7 - 2) + 11
116:8 + (7 - 2 + 11)
117:8 + ((7 - 2) + 11)
118:8 + (7 - (2 - 11))
119:8 + 7 -(2 - 11)
120:(8 + 7) - (2 - 11)
121:8 脳 (7 脳 2 - 11)
122:8 脳 ((7 脳 2) - 11)
123:8 + 7 + 11 - 2
124:(8 + 7) + 11 - 2
125:(8 + 7 + 11) - 2
126:((8 + 7) + 11) - 2
127:(8 + (7 + 11)) - 2
128:8 + (7 + 11) - 2
129:8 + (7 + 11 - 2)
130:8 + ((7 + 11) - 2)
131:8 + (7 + (11 - 2))
132:8 + 7 +(11 - 2)
133:(8 + 7) + (11 - 2)
134:(8 - 7 + 11) 脳 2
135:((8 - 7) + 11) 脳 2
136:(8 - (7 - 11)) 脳 2
137:8 + 11 - 2 + 7
138:(8 + 11) - 2 + 7
139:(8 + 11 - 2) + 7
140:((8 + 11) - 2) + 7
141:(8 + (11 - 2)) + 7
142:8 + (11 - 2) + 7
143:8 + (11 - 2 + 7)
144:8 + ((11 - 2) + 7)
145:8 + (11 - (2 - 7))
146:8 + 11 -(2 - 7)
147:(8 + 11) - (2 - 7)
148:8 + 11 + 7 - 2
149:(8 + 11) + 7 - 2
150:(8 + 11 + 7) - 2
151:((8 + 11) + 7) - 2
152:(8 + (11 + 7)) - 2
153:8 + (11 + 7) - 2
154:8 + (11 + 7 - 2)
155:8 + ((11 + 7) - 2)
156:8 + (11 + (7 - 2))
157:8 + 11 +(7 - 2)
158:(8 + 11) + (7 - 2)
159:(8 + 11 - 7) 脳 2
160:((8 + 11) - 7) 脳 2
161:(8 + (11 - 7)) 脳 2
162:11 - 2 + 7 + 8
163:(11 - 2) + 7 + 8
164:(11 - 2 + 7) + 8
165:((11 - 2) + 7) + 8
166:11 - 2 +(7 + 8)
167:(11 - 2) + (7 + 8)
168:(11 - (2 - 7)) + 8
169:11 - (2 - 7) + 8
170:11 - (2 - (7 + 8))
171:11 - (2 - 7 - 8)
172:11 - ((2 - 7) - 8)
173:11 - 2 + 8 + 7
174:(11 - 2) + 8 + 7
175:(11 - 2 + 8) + 7
176:((11 - 2) + 8) + 7
177:11 - 2 +(8 + 7)
178:(11 - 2) + (8 + 7)
179:(11 - (2 - 8)) + 7
180:11 - (2 - 8) + 7
181:11 - (2 - (8 + 7))
182:11 - (2 - 8 - 7)
183:11 - ((2 - 8) - 7)
184:11 + 7 - 2 + 8
185:(11 + 7) - 2 + 8
186:(11 + 7 - 2) + 8
187:((11 + 7) - 2) + 8
188:(11 + (7 - 2)) + 8
189:11 + (7 - 2) + 8
190:11 + (7 - 2 + 8)
191:11 + ((7 - 2) + 8)
192:11 + (7 - (2 - 8))
193:11 + 7 -(2 - 8)
194:(11 + 7) - (2 - 8)
195:11 + 7 + 8 - 2
196:(11 + 7) + 8 - 2
197:(11 + 7 + 8) - 2
198:((11 + 7) + 8) - 2
199:(11 + (7 + 8)) - 2
200:11 + (7 + 8) - 2
201:11 + (7 + 8 - 2)
202:11 + ((7 + 8) - 2)
203:11 + (7 + (8 - 2))
204:11 + 7 +(8 - 2)
205:(11 + 7) + (8 - 2)
206:(11 - 7 + 8) 脳 2
207:((11 - 7) + 8) 脳 2
208:(11 - (7 - 8)) 脳 2
209:(11 - 7) 脳 (8 - 2)
210:11 + 8 - 2 + 7
211:(11 + 8) - 2 + 7
212:(11 + 8 - 2) + 7
213:((11 + 8) - 2) + 7
214:(11 + (8 - 2)) + 7
215:11 + (8 - 2) + 7
216:11 + (8 - 2 + 7)
217:11 + ((8 - 2) + 7)
218:11 + (8 - (2 - 7))
219:11 + 8 -(2 - 7)
220:(11 + 8) - (2 - 7)
221:11 + 8 + 7 - 2
222:(11 + 8) + 7 - 2
223:(11 + 8 + 7) - 2
224:((11 + 8) + 7) - 2
225:(11 + (8 + 7)) - 2
226:11 + (8 + 7) - 2
227:11 + (8 + 7 - 2)
228:11 + ((8 + 7) - 2)
229:11 + (8 + (7 - 2))
230:11 + 8 +(7 - 2)
231:(11 + 8) + (7 - 2)
232:(11 + 8 - 7) 脳 2
233:((11 + 8) - 7) 脳 2
234:(11 + (8 - 7)) 脳 2

二楼牛啊，这程序怎么写的？教教吧

(2*7-11)*8=24
(11-7)*(8-2)=24
2*(8+11-7)=24
就三种，也就是24能分成哪两个数相乘
2*12,3*8和4*6
1*24没有