请问：
. b ~; M2 m/ ~1 a3 q+ z随机产生的turtle 已经在patch的坐标上上下左右一格格运动，当turtle碰到一个随即分布的patch以一定概率粘合,patch变色，其他turtle经过也还是以一定概率粘合的，粘合后turtle的能量就会转变到patch上，并且以一定速率消耗它，怎么编写这个过程？下面是我编写的，运行时就出错了。怎么改正呢？
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turtles-own [ energy ]; |7 w3 n( t* p' E
to setup1 ?% x8 [" Y7 l
clear-all
3 D N, x" c& B Y7 D! ~set-default-shape turtles "square"
/ Z, K" z5 j, x& o: [: H/ h8 jcrt nutrition
3 w$ m4 R; E3 C" c. ]5 \ask turtles[$ x( v ~* \7 Z
set color white1 P* }+ N- S0 R& a* v" S% j
setxy random-pxcor random-pycor]+ x \3 C- O' ^3 ^& Z
$ t# f4 V, o- e! F0 z* f" oask n-of microbes-initialization patches3 ]. X4 J1 r8 Z' U ^+ E5 {& ^' X
[ set pcolor green]
% w" Q2 c, j% P6 W& `8 f0 ^* D# V ask turtles [set energy 1]
6 T7 U! t/ q( Z2 |% wend
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# A' W# O/ C% W9 T/ a* K% Dto go
2 r6 o1 ~/ u, H' S6 n. Q; [ Z% b: [ ask turtles [set heading 90 * random 4 fd 1]
) \$ R2 m& b* ?2 D. d ask patches with [ any? turtles-here]
# s+ K" L, c4 F: S7 t. [3 ^! t. X [ if pcolor = green and random 100 < chance-of-congregating [tt ]]
2 X: h( t* }& I/ W3 r; z6 v# l% O# c ask turtles [ if energy = 0 [die ]]
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to tt
; ?- [ E# g' ~# o( }. |- Hask patches [set pcolor gray ]
% b# r; O0 ~% o" hask turtles [set energy energy - 1]
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发表于 2008-4-8 10:49:43
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