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: X }/ v! z q$ {4 t. R7 ^' K: j
请达人帮我指出错误好改进/ e# s: {. K, x5 P6 k! k" q$ K
" T1 X2 p5 K Zto find-distance6 W' t$ Y9 r! P, P- B# ?4 n% H
let i 0+ W% ~7 A: p( U U7 W [
let nodedistance 0
- _9 {) C4 r% ]/ x let linknumber 0
N$ d+ t9 N) f- I' s while [i < count turtles]
5 g) f3 D3 V- q. [ [# @( ~+ E1 V3 g
if link-neighbor? turtle i* ]! y0 N+ K9 d- _/ F
[set nodedistance (nodedistance + sum ([link-length] of turtle i))
7 v1 X, C, c& B2 E set linknumber (linknumber + count [link-neighbors] of turtle i)]
+ F* D3 ~& \) H7 g- [ if linknumber != 0% x+ I4 e- w: u
[
% C, e a x% S( j set average-node-distance (nodedistance / linknumber)) P( Z' L1 K* U4 w/ g
]
7 Q k- o! \' ]0 H% h) [2 X set i i + 1
1 j. q# F) o$ S' B& Z: U ]% @9 } p1 x M5 b$ k5 ?5 X
end
7 @3 g/ U3 s3 \# J: d; S
" l- q( c" C1 m( F[ 本帖最后由 qy987 于 2008-11-12 02:18 编辑 ] |