我编的程序如下turtles-own [energy]$ f" {/ w' i" j5 t* l% J
to setup# V5 g+ ~2 o# X' C2 ]5 |
clear-all
# k* d. y s H, \7 m setup-patches
9 L5 n P/ I5 v. w5 K6 c. ? create-turtles 100
6 I3 D) t' v) T9 I8 C do-plots
7 H$ s x2 b# V" e' M0 V% c0 m7 n ask turtles [ setxy random-xcor random-ycor ]
/ J; q1 t# N: wend
$ |* H) h- [6 _* z) N5 rto go' U! ?1 G- @: B/ `) ~. S
move-turtles5 G) n2 j, f: R
eat-grass% H+ M- a. N6 M" d
reproduce
+ W. M) q4 i2 P$ P4 t2 J check-death
7 U, `- ^8 C$ q- O* d) L regrow-grass
: }8 X. g1 `, {* {5 e do-plots
# F- E! i6 p9 P- L) P6 I! u/ Qend
% _% n B h* y( T8 x& tto move-turtles/ I2 l, |6 T# }0 d4 P- B6 G: Z
ask turtles [
7 a ]4 F/ C w9 ^ right random 360
' l( w" d$ u- n( F V forward 1
# r9 T) K- k( j3 P0 t$ g set energy energy - 1
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- L1 v# W% U* o: o7 `/ x" rend
+ h; }1 l6 b W" j# R; I% pto setup-patches
) X& o3 a0 h+ }# j/ a ask patches [ set pcolor green ]% _3 { X( @7 A2 F' e, T
end
, ~& R& w5 x; A3 ]+ `# l" p$ vto setup-turtles
9 Q8 k7 k9 K3 O. @ create-turtles 100
4 S) m: I/ n; w1 u/ Q* \ ask turtles [ setxy random-xcor random-ycor ]
5 m! \7 S: V& R$ a* eend
% O. Z5 j" c N; W) cto eat-grass9 z$ {6 r/ Z$ ]( p/ B% _8 u
ask turtles [5 H y8 \6 g3 n7 h/ c; F5 ~
if pcolor = green [$ N$ x9 i# s% t
set pcolor black' q$ h1 r5 i1 O& O+ T8 x, H- o4 |
set energy (energy + 10)# k; J- o/ [' j& H8 }+ ~
]
1 Z4 D. Q) c$ i9 a$ [ ifelse show-energy?
" b+ W2 C" j# ^+ X [ set label energy ]6 @" B4 E! a" E: K
[ set label "" ]
; k, H A! m& m! c- g' o ]. D& |: L& H9 J) {# S
end3 j# v3 L$ d# E8 p
to reproduce
+ `1 [2 j' I% K7 \$ M# K ask turtles [. k% x5 M5 C! s+ F! l- N
if energy > 50 [
- I% r+ J2 f2 n+ w: {- D set energy energy - 50
6 T* N+ ]" O; K7 c* I hatch 1 [ set energy 50 ]
9 \ J; T5 G0 N ]
+ ]3 u: b+ {& J9 O- {+ e# v ]- {7 K7 V: c8 l6 f
end& `% J0 l4 y6 I" u' P4 X
to check-death4 o3 U+ |% a2 M) S7 r4 j# x) j
ask turtles [ _& f& R/ G* S. u& g2 t! i
if energy <= 0 [ die ]
( g1 G) S* H' V ]: ]1 D4 p, t9 w$ ?8 ?
end
4 f- V/ _- h1 a2 G6 R+ H0 qto regrow-grass- P+ g% q3 a! O* f5 K
ask patches [% r0 u3 e) f5 Z' [& P& E. H% s8 |1 N
if random 100 < 3 [ set pcolor green ]
& g' Q4 g. F% N+ c4 j+ j ]
C5 J8 J' X4 x( y2 [3 uend' d/ M8 J) d1 B) y' x! v
to do-plots
5 O3 Z) g7 n/ A8 w" Y# L* N$ ` set-current-plot "Totals"
. p- q+ a8 J, t& {4 B set-current-plot-pen "turtles"
9 I5 j' T% R: g1 a0 p& U; U plot count turtles3 X9 D; O } X1 Q3 f8 m# N+ U
set-current-plot-pen "grass"
% A* m' Z. {; @- q6 d4 z2 g plot count patches with [pcolor = green]
+ L& e1 A- E4 v. [" pend
. J- Z! K( Z8 F4 d# h( T; A可是运行时提示no such plot: "Totals"9 h" ~% N: H8 b! ~' m/ I$ g
error while observer running SET-CURRENT-PLOT
v. L. E' R' i) h called by procedure DO-PLOTS
7 ?) l3 U7 j0 r" N8 L5 r0 ]9 v4 F. ^ called by procedure SETUP. d, W/ n! W" x7 S! v
called by 按钮 'setup'& N, v' P- d7 v9 [6 E
求大神解答啊 |