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
& V0 [* o3 ?% p请达人帮我指出错误好改进$ H2 \( O& o6 T6 I( }
. M" }* ^: D% B" ]* a: T& `% w
to find-distance7 P+ ~. B7 t0 @
let i 04 x8 q* C# ?5 D. t: D+ C: Q2 e
let nodedistance 03 j. e& T8 f" b( s) p; K% @' c5 ~
let linknumber 0
" q! @, H& w* O' R$ ~& M* m+ ^$ x while [i < count turtles]: P- P: q7 j+ [8 p8 @0 M# m6 r7 F
[
7 {/ S, Q. p6 {3 a if link-neighbor? turtle i
6 Z; P- R3 S$ I1 |2 Z [set nodedistance (nodedistance + sum ([link-length] of turtle i))- K3 X& |. m+ `) C6 e" d( {$ f U' z
set linknumber (linknumber + count [link-neighbors] of turtle i)]3 p& q+ O; z, t6 Y% g, x2 P
if linknumber != 0
) T! J" V) E6 n3 @ [ [3 N: a g8 |5 U' e
set average-node-distance (nodedistance / linknumber)
, g Q; v! e% V$ t' ^1 G! W ]
. g; `, |( g9 Q+ G set i i + 1
+ o; o& z8 A6 Z A0 t4 H ]
6 K: j- h0 N- u' Oend
; T( l. Y+ f, [ s# n) n
6 r) P a# }4 B$ S. ~3 d& N[ 本帖最后由 qy987 于 2008-11-12 02:18 编辑 ] |