我编的程序如下turtles-own [energy]
6 }& g& m9 ], i- R8 C$ @to setup
+ B7 |$ m3 t+ U+ ~% k clear-all6 V7 h" u+ D+ q6 z$ l) t; F# G
setup-patches4 k# ~* z" f" p/ m' S# `: B) N
create-turtles 100
1 k( A4 l5 t o6 d do-plots
! G( {: D& j/ \. C6 L3 D! ` ask turtles [ setxy random-xcor random-ycor ]
9 t, ?0 m6 j* l% k. f; s( Bend: z+ q/ p0 A7 A# e0 J
to go; J1 {/ p' o" W& i
move-turtles K3 w3 T8 M. D/ k% D" f
eat-grass4 [ p/ i+ \. n; [, Y; y$ ^7 Y
reproduce
6 [1 L& p+ z4 i i% f, C9 H7 T check-death
$ y; l6 U5 H q, t, G regrow-grass5 y- ]% q! @* r3 u8 A5 i
do-plots
7 }7 T5 E0 H1 J4 r4 Bend
: L7 q; [% t& C5 ^to move-turtles
# a4 I/ n( B0 @$ e" W) n% {2 _ ask turtles [. D* j3 @- b* @* Z2 s* p
right random 360" c, }+ X; g6 i$ |% O' s- }
forward 14 m w0 v- e7 a8 ^1 \; |' P
set energy energy - 1
9 m1 N2 P' d' S+ A4 I ]
/ U+ ^2 \' }, k1 T0 f2 V; Kend
: ~( U) v5 b9 j! [4 e+ Hto setup-patches4 G7 F/ |0 T' c/ R
ask patches [ set pcolor green ]
+ ^9 ~ {. Y, N% H- H- x Lend9 u0 d* G1 v0 a9 v; n9 z
to setup-turtles
! f3 |1 N5 `' L5 H create-turtles 100
" j/ _3 }. j7 `- \7 u0 \* ` ask turtles [ setxy random-xcor random-ycor ]
8 N) v% f" W$ L) Q' Wend
# u" o3 n- O: q5 H" w6 n/ m3 mto eat-grass9 m3 f' `9 j4 e, k+ Z
ask turtles [
$ z7 S4 D1 y( d; @- i4 ~# x- M if pcolor = green [# Y/ w8 s6 `* A/ j6 y) ]
set pcolor black0 b6 D/ G9 w8 v
set energy (energy + 10)) r& Q- r; }3 b% Z4 j+ }: V: K- K# n7 X
]
3 `. H. N/ n6 G `$ f ifelse show-energy?
8 x0 R4 v( o) m+ z* W: m/ ~( }8 ~% o [ set label energy ], E. ^. A1 d( F8 n: ~
[ set label "" ]
6 b+ I. [* h$ W6 A- X* U* y1 N* w ]
+ \0 b( j# ~1 Q- C I: `4 o, Eend
5 f( i8 ]4 T+ N/ L- M( oto reproduce s$ h, p9 d& Y1 D# y: z
ask turtles [ o6 U5 N; H, ]! b: x) a2 u
if energy > 50 [+ g2 `; d' p. d% j# J2 l- a5 w
set energy energy - 50
( g) H% N/ _- Q hatch 1 [ set energy 50 ]/ I: D+ o( I- Q: q) e
]) O' u# t% Z1 B. F, g) v
]
! Q# ?) g9 b5 ~$ l9 z4 fend& l9 j; @. Z0 n
to check-death
; j& T6 G, V$ ]+ i3 e# H ask turtles [% E3 Q5 x+ \+ M* C( }1 b0 B. J
if energy <= 0 [ die ]. x- |6 f o" g w3 j& E' e% W( ?
]
" E+ q2 b1 o7 pend7 F8 z8 E+ O( q3 s5 Q7 u
to regrow-grass# U; Y/ I' I. k' `
ask patches [
+ c: p( t, k8 Z# t, ? if random 100 < 3 [ set pcolor green ]& G% ]6 {2 B! `. j; h; k9 M: ^# `7 g6 \
]' i X2 `. K7 ~
end
; v# X3 `( L) R: D+ Jto do-plots+ @$ ~; ~) h5 H# L* b: i
set-current-plot "Totals"
3 _1 v6 Y r) u# K( E8 X) Z set-current-plot-pen "turtles"
- b! {$ B" A7 d# l plot count turtles
2 E E1 h; n) x% M set-current-plot-pen "grass"
7 [/ S# I6 A6 i# ^- s plot count patches with [pcolor = green]
q) y* }) Z8 ?end, Q: }0 v9 O6 U* P; `
可是运行时提示no such plot: "Totals"
7 U1 g& ^3 W* t( ]. M# X1 z# verror while observer running SET-CURRENT-PLOT) ]( V! A4 N3 D1 I0 e5 K
called by procedure DO-PLOTS
+ R7 f% H- |' P called by procedure SETUP
7 G3 Y9 T! d7 y4 Z6 X called by 按钮 'setup'* f* S: ?8 t+ e
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
