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 I! d! J; [9 N& ]" f
请达人帮我指出错误好改进. `) n1 r$ {& S7 A6 O+ W" ]2 r; ~
8 u/ Z8 }% ]; s0 x
to find-distance
# r4 t2 `5 G" Q$ v% w9 O let i 0& C5 K3 ~$ H' {! B. c, Q% b
let nodedistance 0
! h _4 w+ I9 v+ D5 [3 y let linknumber 0
+ K2 d4 e$ O3 X# y) V2 H1 Y while [i < count turtles]8 w- P5 o& }% Y" G. u% L4 p
[6 U0 \: }) D$ J' G, x" m/ f
if link-neighbor? turtle i$ D/ v; e8 \7 q# X
[set nodedistance (nodedistance + sum ([link-length] of turtle i))0 k- ]- z& T5 F& l) r, }
set linknumber (linknumber + count [link-neighbors] of turtle i)]) V8 r' E( K4 M$ ?5 t/ I
if linknumber != 0% \8 h7 Y+ V+ ^
[' F* ]$ \# e* Z$ Z9 a4 i
set average-node-distance (nodedistance / linknumber), n; B$ V, }4 r" E5 |7 _5 v6 c
], |! O$ l9 O1 v/ L' s" Z* R4 V
set i i + 14 p: M% V# f, v# _
]% M# |6 R4 G4 W, N) ?) b, b
end
5 Y! Q$ n& T2 c* ^+ `
; r- O, e6 G: ~; w, j/ Q[ 本帖最后由 qy987 于 2008-11-12 02:18 编辑 ] |