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
% s+ R, e( U/ S3 h0 V4 O& z* [请达人帮我指出错误好改进/ k" s2 c( j/ _5 J
6 | j& ~/ i1 E/ t" m( G& sto find-distance6 V. Y2 q4 O+ a' V& k7 e9 |
let i 0- R2 Q# | c& m# A8 Z: s7 N
let nodedistance 0
' t. {( j2 I4 F" a, N/ B( C let linknumber 0
! l9 x1 N- T3 M+ D9 |4 d while [i < count turtles]9 `" _" I5 i" X: u& z
[
9 l- I$ v5 U) V9 J3 a if link-neighbor? turtle i t4 k" L! R2 x* P6 r0 m- P
[set nodedistance (nodedistance + sum ([link-length] of turtle i))/ G6 ] S) g1 W" b
set linknumber (linknumber + count [link-neighbors] of turtle i)]
* S# f4 n# g i: w if linknumber != 0
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. K4 a8 l% f9 S+ G set average-node-distance (nodedistance / linknumber)
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0 X' L/ |9 ^( f6 B% \1 ~0 V$ l# u. n set i i + 1
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& N, C0 I1 ^' e7 w+ yend. N2 t; {. W, Z$ @/ S2 d8 ?
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[ 本帖最后由 qy987 于 2008-11-12 02:18 编辑 ] |