我编的程序如下turtles-own [energy]
5 z; v- ^2 f, w1 O7 zto setup
2 F9 E/ j9 z9 @) b clear-all p! v: ]$ [, B( A" ]7 ]% \7 c8 ]; r; b
setup-patches
: y& m) g; I/ j" ]: b5 a, |( ? create-turtles 100
, l6 d/ ~0 U- b2 C8 l _% Y do-plots* ]# o# g/ p1 A& ~; v9 u4 T
ask turtles [ setxy random-xcor random-ycor ]* G, h- b* X! ?, N* e6 h1 f5 a8 Q& m
end
) J. S) c Y3 G9 k1 z0 `to go
# m, A( E T# M! G move-turtles# X5 ]2 W4 w9 g; f5 r
eat-grass& E7 \8 O' d0 y
reproduce( G$ m. D" n; K/ n0 z
check-death0 ~3 ?+ p9 W2 @8 R5 S7 a8 m) q
regrow-grass
* L: D# \2 b; F; n9 q8 @8 d do-plots; Y, i+ A# O h. W* O. |
end
' r( T$ B4 r1 r+ _% Jto move-turtles6 _' k( N2 [. H w; Q& C: A3 `9 |/ Y
ask turtles [
, R5 {' N5 h ]7 H right random 3602 h5 c4 q6 [ B; u- w; j
forward 1/ l3 p& _ [2 Y! c2 T8 ^
set energy energy - 1
% m8 F5 ^9 J+ f0 ]# [0 A ]3 I3 O9 G6 P0 G) @. u- Z
end
: E) h2 ^4 G' _ q$ t- rto setup-patches5 |: j7 E7 e3 k6 k' ?) ]: w% f
ask patches [ set pcolor green ]
" o( s9 w, _( n" x4 Z7 u- `end3 @& N8 R/ l0 ^) F
to setup-turtles
1 |) j2 u$ ?& o5 {4 D# c create-turtles 100" W+ _+ D- l5 ~5 y% H
ask turtles [ setxy random-xcor random-ycor ]
& v9 S3 e; Q g9 h3 E: lend. k( J7 D- H2 O8 E
to eat-grass
+ n! O. v! A4 _ ask turtles [
/ o; Q. i7 M. N. O9 H# q3 C/ W$ }% h if pcolor = green [3 N6 W0 T& d/ S/ p' o9 S
set pcolor black
) u6 J) p- u, ], P% R. R( [ set energy (energy + 10)' v5 |$ t6 H) E$ V4 R! G" K
]
' f. z! V3 I' e& g/ E ifelse show-energy?
: C% ?& U& i; H, o, _3 v4 a [ set label energy ]
, X' f, _9 h9 G5 I/ Y2 X+ t3 v [ set label "" ]
3 Z- T ? T. }; _) j+ F ]7 k& Z) ^% x' o' V) ^( N: V5 N
end. m; q; e% N0 K
to reproduce
3 f+ [; p. @& b( x$ }& k8 u ask turtles [
8 F: s5 s2 J; A5 W7 u5 z9 U$ r if energy > 50 [ q, [5 v: h8 Q7 ` Q7 U$ Q
set energy energy - 50
1 d, B& R5 M$ L' K6 b" V, V hatch 1 [ set energy 50 ]! H$ `" w. r6 k3 \/ s0 P
]" S' g f0 N" ~2 X- W' c3 O# _
]
! q1 Q1 I0 _" p9 j( E. Y6 Qend# [8 a3 o6 E1 c D/ ]6 }+ d6 c/ ^) E: f
to check-death3 m- A. T5 D5 p# ^$ q) I
ask turtles [
2 |: B" Y M1 V if energy <= 0 [ die ]
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end
7 H% l$ J. J& T' s# fto regrow-grass
; E- b- Q! {4 ? ask patches [ ~/ Y2 q7 f$ b0 T1 n$ C
if random 100 < 3 [ set pcolor green ]
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end
/ T3 H/ V7 M9 f# n0 s* D. J' x- q! O& Fto do-plots
, k, l8 R/ Y' a0 S# f. i4 m) [ set-current-plot "Totals"# J* t) z0 L& l8 I/ I- l! I( g) U6 X
set-current-plot-pen "turtles"
2 o; s, a' l9 u) I1 T! [ plot count turtles
4 G, j' ^' S6 _( ~+ E set-current-plot-pen "grass"9 d. h/ j( w+ l# R
plot count patches with [pcolor = green]
- r; _" \4 R( ^* i7 j7 Send
/ V+ @" A7 g' c) `/ H$ a可是运行时提示no such plot: "Totals"
$ r# T- Z1 s, ^error while observer running SET-CURRENT-PLOT7 C+ @& @9 {$ ^7 t# P! ^8 V
called by procedure DO-PLOTS v! A3 @" ~& ^) G) D
called by procedure SETUP
" f5 e9 w! s- t# F7 I2 G2 G called by 按钮 'setup'
* D# @ l8 ^- |! ^; q, A求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
