请问：
: Y5 A O8 `" D" E% D9 Q D8 y$ g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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9 e/ m# c9 ~5 r, j! [8 U- Y' `turtles-own [ energy ]' C, d# f7 g# O" M, Y0 k
to setup) |! _& f, o5 g' ^- N
clear-all# v( ]& ?2 r) \4 \) H# ^
set-default-shape turtles "square"- L/ T' T3 ~ m" m
crt nutrition
2 c1 y- d! q* g; Uask turtles[2 H' s ^1 g# r; F4 T9 Y5 S$ E2 X
set color white
+ Q9 a9 h9 K, t H setxy random-pxcor random-pycor]
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ask n-of microbes-initialization patches
6 X) Q3 I. F4 ]: q: K [ set pcolor green]1 I7 j* H( P( Z9 K6 s- ]
ask turtles [set energy 1]
+ O$ p. v7 N, y6 ~$ Q+ b8 l* q; A; ?end
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to go, z& @0 k! G" i O+ L
ask turtles [set heading 90 * random 4 fd 1]
" C! Y7 [7 p0 X9 n& g+ ^ ask patches with [ any? turtles-here]- C9 f& e1 p6 ^
[ if pcolor = green and random 100 < chance-of-congregating [tt ]]$ s% `5 x% | G- Y; i0 A
ask turtles [ if energy = 0 [die ]]
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to tt" F" U( i% N/ k, x0 a
ask patches [set pcolor gray ]. l$ z3 C% t8 k! V/ e0 R
ask turtles [set energy energy - 1]( w$ `% \ x1 {4 l
end+ N6 s1 l2 K8 e# y7 m
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发表于 2008-4-8 10:49:43
楼主
