请问：
& C1 C8 g6 S3 {, B% S2 @8 [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？) U" {+ D9 T- n1 a; B
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0 Z( u& }# x( U. _1 @turtles-own [ energy ] z; h: f' `7 i
to setup# R( x- Q' _$ ^& Q
clear-all
# W& J$ k# W9 g9 i9 E- H8 Bset-default-shape turtles "square"9 K0 M* X! Z' e& L9 R2 O2 S
crt nutrition. D9 K0 N0 d' ?+ ]& Z, {
ask turtles[
( C' p J" v; b' O/ X set color white! g9 @8 `% C) @' n' g' e0 _
setxy random-pxcor random-pycor]2 A3 L" o, H0 f( x" S
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ask n-of microbes-initialization patches
! {/ s* _+ V% s& F& g' b" q [ set pcolor green]
^ a1 e7 a; L ask turtles [set energy 1]- y4 C! l. V% n+ A2 T. [* @
end
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- z( F+ _* q2 B/ C$ }" }7 qto go
+ ^8 j4 p& z h, \ ask turtles [set heading 90 * random 4 fd 1]
* {" K7 S* z$ t @ i/ m ask patches with [ any? turtles-here]' [" ?- R% ^2 o3 E D5 r6 t
[ if pcolor = green and random 100 < chance-of-congregating [tt ]]" r% ^) g, ]8 x2 s" a- h
ask turtles [ if energy = 0 [die ]]8 ]* k+ v/ r* u
end
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to tt. x+ O1 d+ ~- x
ask patches [set pcolor gray ]
e0 G) g) c; J& N! J9 V. m0 X7 o/ Q8 H7 M, fask turtles [set energy energy - 1]
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发表于 2008-4-8 10:49:43
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