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
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to find-distance! C. D. p) y6 i3 P9 h. V
let i 0
$ A( N$ |8 q3 T; I5 h D/ x( n V let nodedistance 09 H% l+ H6 V/ n+ q
let linknumber 0+ X) B1 O- k1 b/ w. P) q' L, N
while [i < count turtles]$ n, Z ?- k$ B. ~$ k' N, [+ z' S8 S
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if link-neighbor? turtle i" ^" L* T2 O4 `& L
[set nodedistance (nodedistance + sum ([link-length] of turtle i))
3 D& H; X9 u4 `5 k; k ? set linknumber (linknumber + count [link-neighbors] of turtle i)]& i7 P" g0 G: s$ R. n% h
if linknumber != 04 X% m0 I$ E+ G7 X/ [6 B- f. C9 s
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set average-node-distance (nodedistance / linknumber)
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set i i + 1
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end7 \) E2 x- X; ]( i9 G S# n
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[ 本帖最后由 qy987 于 2008-11-12 02:18 编辑 ] |