我编的程序如下turtles-own [energy]
9 |' n7 H: R" Qto setup! T% f8 h- C8 @
clear-all' A1 m9 O# ]! g- z8 X3 f* u2 }% U
setup-patches
$ b# F# g, A$ ^) c. k6 c$ M create-turtles 100
7 x( r; @+ ?+ c: H) D do-plots1 J' ? R+ t! J N
ask turtles [ setxy random-xcor random-ycor ]$ H0 C' k9 f3 d& p& F0 F7 n
end
7 e$ v) D# Q \7 ~0 I: e0 Zto go6 d. ?% O) E/ m0 k' n# g
move-turtles
# Z6 [7 Z+ D* a2 ~7 t) o3 v eat-grass3 f% b/ n7 T5 V Y
reproduce$ w6 m) u3 T9 Y \
check-death
6 \2 I- W- q- U- O regrow-grass
$ Y3 f8 l# r6 F. a: J. c do-plots
7 n0 z, F/ m( x( Yend c/ p: D1 {/ n' z; G. [
to move-turtles
' q* o! J5 |7 f& |: B. w3 T ask turtles [
* R; l5 }3 m& u! ], \ right random 360. M4 a# C& Z: n3 [( e% _3 s* _7 Z1 [
forward 1
o" p7 K; y7 r( l9 @2 z set energy energy - 1
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end
6 e2 c3 p; q+ @3 F- i, J( S. {to setup-patches5 \/ }6 j# W% |& O0 R; H# z
ask patches [ set pcolor green ]
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to setup-turtles; n, {2 j$ h/ A- E! D
create-turtles 100
% d# ~( Y0 h9 O4 [ ask turtles [ setxy random-xcor random-ycor ]0 v3 H4 l4 O, J5 ?, \3 I
end
* s/ C" N* V$ M: zto eat-grass" B8 S$ E% h) J2 ]2 D
ask turtles [- A& L% j2 o: o* ^" o% q
if pcolor = green [0 Z! T/ W5 ?" d6 W# B
set pcolor black9 I) d' s; L3 j8 @
set energy (energy + 10)+ S. g+ B/ Y- Z1 J5 W3 X [
]+ f; P8 R4 u6 l
ifelse show-energy?8 A+ F+ s$ I# r. r* h) e$ Q( ?
[ set label energy ]
1 D, b+ a9 N/ a4 X- u2 f- g" b [ set label "" ]4 K. b, O) H) V+ y
]
% y1 X1 h/ T4 Z: i" R$ xend
! G' l' k8 t! z- @/ ]7 Bto reproduce( l" R) L) ~0 |/ H
ask turtles [
; H( c2 }: d3 T- B if energy > 50 [+ Z$ D% v8 s+ a q
set energy energy - 50! I1 `* W2 L' s
hatch 1 [ set energy 50 ]
, z7 m: |1 N6 P ]
9 X" t! l' Z5 R7 ?1 @; { ]
5 J% J! E6 r* I H* ]7 V4 Mend7 e8 t: P& W' N6 e ]& q' [" y( O
to check-death
( O* ]2 ]1 h; o# |# M! R ask turtles [
8 }0 R1 ]* ~+ q0 |9 r' A. o, T$ s if energy <= 0 [ die ]
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end
' s. ` s+ `8 Z2 u# Lto regrow-grass
+ a1 d& r: J$ [+ ]& i ask patches [
! x4 @( _0 E: G( a2 l& ~ if random 100 < 3 [ set pcolor green ]3 P7 w/ X# _- f$ O8 E3 [) Z
]/ T; R3 Q+ O7 o$ {6 `/ K3 y6 @
end
. x& ~" a. z! Cto do-plots" g$ }1 i- V' b7 T& z# i
set-current-plot "Totals"/ g2 M1 K" S8 t& O$ Y# Y* Y
set-current-plot-pen "turtles"
* o$ h* K6 K9 x8 G plot count turtles) f, s) z: i3 B5 r8 R: c, x
set-current-plot-pen "grass": F, h ]/ y$ N a& ]$ P
plot count patches with [pcolor = green]
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可是运行时提示no such plot: "Totals"/ g% i1 P8 }4 H6 g' j
error while observer running SET-CURRENT-PLOT
: M' h: F; j$ \2 d called by procedure DO-PLOTS7 E( e9 E0 f" |) F3 _
called by procedure SETUP$ M& s* C3 |& }# G* a' b& W- _
called by 按钮 'setup'( x- M' p J& ?4 ?: B6 J
求大神解答啊 |