我写的这个计算语句,调试时通过,但是运行时出现了不知名的错误8 x+ V2 b9 Y# I: T
请达人帮我指出错误好改进 q. |+ k6 {& ^+ v t5 {+ N
) C( ~ k- r0 P2 Y4 F$ Q5 w3 Vto find-distance
' O, U, P* Q9 \% n; M* A let i 0
) P f* R' B" |# Q' I let nodedistance 01 c) ?9 T+ U2 \/ g, d" {9 _" s
let linknumber 09 x7 \6 w% y3 B
while [i < count turtles]; M, j. t' }& O6 G
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if link-neighbor? turtle i
8 }9 u) q$ B2 d* l2 d! L# O; W [set nodedistance (nodedistance + sum ([link-length] of turtle i))
& B% a7 L/ m6 ?7 R, h) \7 v set linknumber (linknumber + count [link-neighbors] of turtle i)]
- }; s# e6 U# ^. P5 ~2 c if linknumber != 0- r- _0 U6 K6 d" }5 j9 d
[
3 W8 |7 J! n3 l7 S: C set average-node-distance (nodedistance / linknumber); r* f q; k, I& e
]
6 G* [3 o3 L! Q) i% b { set i i + 1
# Y% S4 G- c* m& H0 p8 S ]; c% K! ]6 `: J5 p3 T& h1 K' d
end& z! ]( t! D2 ?8 b+ q% [9 e/ `0 {4 Q
+ x5 O$ i. Q2 J9 `- ?% z% F[ 本帖最后由 qy987 于 2008-11-12 02:18 编辑 ] |