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9 ]( H) x' S$ N& j/ K) v6 L$ L
请达人帮我指出错误好改进
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' R* X( |7 k8 E4 Q, ], bto find-distance
; _3 d& T8 S+ t* i let i 0 {7 g2 V- l- f
let nodedistance 0
6 \& b1 f3 t3 `; J, O7 E let linknumber 0
6 t6 F$ M& {9 ^( u9 a2 C" v while [i < count turtles]
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% D% o% y8 G/ d if link-neighbor? turtle i8 X* ^+ @4 h5 k/ O- x7 u
[set nodedistance (nodedistance + sum ([link-length] of turtle i))
$ p9 J0 _' A, ]. p8 V set linknumber (linknumber + count [link-neighbors] of turtle i)]& U0 m- d- r5 Z7 `
if linknumber != 0% P& b1 t! t: R/ H6 s
[
" d# p# V$ H' X4 \/ ] set average-node-distance (nodedistance / linknumber)5 f3 J# q& T& N
]
+ o& i0 C! j8 [5 R- [ set i i + 14 S: f. z4 _% R; b4 I0 U
]2 O8 x0 J3 j! ~' ~6 M, |$ h4 d3 X
end
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4 n/ |1 m5 Q+ b! R- [6 a0 h! `6 v[ 本帖最后由 qy987 于 2008-11-12 02:18 编辑 ] |