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5 W% V7 F" G1 g7 m+ I: e
请达人帮我指出错误好改进
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to find-distance, G0 y* L% I; R
let i 0
! c6 _! q4 A/ u: T/ S( J let nodedistance 0
* F; s2 Y1 ^* ~6 ^" W- N let linknumber 0
5 J3 S3 u& J1 ~ a while [i < count turtles]( f3 n" P* f |5 O3 s% _! l' F) B9 G
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if link-neighbor? turtle i
6 X: r( d! l, _# R5 h) B [set nodedistance (nodedistance + sum ([link-length] of turtle i))
6 r* m, t1 Y8 b0 L) ]7 P' m set linknumber (linknumber + count [link-neighbors] of turtle i)]
: `9 \' o$ ^; X* \/ L" F9 s if linknumber != 0) e9 z0 v3 g0 G/ h% b
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set average-node-distance (nodedistance / linknumber)1 c" |$ ~8 S" }2 P' Q& d* Y
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set i i + 1
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end: R* b ?: b' |9 m. `! d& S
' J5 V, t1 U/ p( ]1 \[ 本帖最后由 qy987 于 2008-11-12 02:18 编辑 ] |