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
1 f& ?' |* l4 f' P5 y3 F2 C" M请达人帮我指出错误好改进+ n+ C) \4 e, w% ^# z# p% P3 u3 A
5 r% y5 c- B2 C. Pto find-distance
9 k0 [5 K0 k, w7 ?/ X! _- }9 d/ d let i 0
8 l4 g8 S1 ]1 I% K) B8 ?' F8 R. g let nodedistance 0+ G D* c. F. T2 x- q- B
let linknumber 0) ?9 k3 E0 E! ~
while [i < count turtles]
# v# J: y/ H) {7 F' O. x: }) m' D [" P+ {+ f f0 e8 n7 \, m
if link-neighbor? turtle i5 `" e0 B! s0 K8 Z3 n; ]5 N
[set nodedistance (nodedistance + sum ([link-length] of turtle i))
* B$ U& R4 Z# v2 {1 y set linknumber (linknumber + count [link-neighbors] of turtle i)]8 c2 w* K7 \8 X6 K! n6 s- X
if linknumber != 0
Y5 q$ R0 B8 @% b7 ? [
1 L+ }- b3 f0 Q set average-node-distance (nodedistance / linknumber)
+ j- W2 z! S0 t% G- {) s3 b ]% P0 G( O; i9 a( M) Z& x7 F4 P
set i i + 1# R! _4 s# h) J; E% i0 K/ Y
]* x4 `. b# v: s( `* |
end
0 h n/ \/ {, i6 z# O" Y8 |7 s: b) p7 B% l5 f/ ], C* R
[ 本帖最后由 qy987 于 2008-11-12 02:18 编辑 ] |