我编的程序如下turtles-own [energy]3 E1 A% A& s- \
to setup! c t' u+ t( A) L. G- |7 H
clear-all/ p) a1 |7 h' L
setup-patches
, \7 U2 J, I( c$ g- Z create-turtles 100' g6 c3 t9 l, |9 M) S
do-plots
2 p" ]. L4 B. s m. b ask turtles [ setxy random-xcor random-ycor ]
) \( ^, B2 k2 }' Jend8 Q! p2 }+ g! L
to go
2 w3 Z) j3 N8 ]4 E8 @ move-turtles
5 M) \* ~1 j3 T. B eat-grass/ X/ [* J/ s7 e$ M
reproduce
+ n' j$ h! M S& Q8 u+ y E check-death) C+ o- r% {8 S
regrow-grass7 E3 \* b3 k0 `* Z
do-plots
$ N* n1 I# r3 b) `% \# a2 Hend
: h- @: M- h7 i; P4 ?to move-turtles
# j" ?0 B* G, @- D ask turtles [' ^% N# Q Q7 s( Q$ T! Y6 Y! [2 _
right random 360' |" v$ g' }, L. N* I& {* x
forward 1
* N7 e, B$ O) \6 G7 Q" V$ ^ set energy energy - 16 s8 B" }2 u. s6 f
], a1 X! z2 S) Y9 l( ^
end
0 |: f2 }0 t! g& J$ e! hto setup-patches
6 A& ~' T0 B: i2 `- o ask patches [ set pcolor green ]/ B, @. u# U/ ^5 K: z0 a/ H9 Z5 ?2 c1 s
end. M7 j' e2 y( Y" x# g
to setup-turtles$ f0 l# M! V' E3 M% I5 {" O1 _- c
create-turtles 100
' o1 i8 F0 e* y' ~+ p0 p# ` ask turtles [ setxy random-xcor random-ycor ]9 v/ ^4 @& F3 e, c1 b! \5 Z
end
k/ q. V4 p4 y/ C, [" {1 {9 cto eat-grass% K* @. N2 K! [" b, |, T9 \
ask turtles [
3 E4 `2 y+ f# D if pcolor = green [) a4 x5 g; R$ m
set pcolor black
* j; z3 [( c1 Q set energy (energy + 10)* G: I, C7 q# c( J
]) T# j1 i6 g! E! O7 V5 \
ifelse show-energy?
, v, { h/ N$ o2 |6 X( o [ set label energy ]/ A" M5 Q8 B% G
[ set label "" ]" U2 g8 o/ e* k- Z/ J$ P- L, I3 y- G
]
/ I! y; a% r% n$ t0 p8 E2 P- nend8 R" w* w3 E% u4 q
to reproduce4 _' X7 Z9 }6 w0 ]9 I
ask turtles [
7 M# |: q2 N) G$ U3 j! V if energy > 50 [
. J! D$ ^/ f% ?9 S6 j" y4 F set energy energy - 50: Z8 k: q5 b2 P
hatch 1 [ set energy 50 ]
7 d5 r7 B" o, H ]
# ? r9 w' O! V4 A$ ]! U ]; m k0 A6 X- `) c' R
end
& O. X3 m: d7 Ito check-death
/ T0 |/ f$ [; N' Q2 C" t ask turtles [; `" A/ I$ N! v: {
if energy <= 0 [ die ]
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end
/ L3 X6 z8 w" h. s& d; dto regrow-grass' W+ z( L; I/ W* j0 ?
ask patches [# W$ E( U& i% ^# b
if random 100 < 3 [ set pcolor green ]
: n' ?0 x+ v4 Z7 d! w. m ]3 o3 _( y1 i+ I+ t
end
; U, {1 K6 v9 ?6 wto do-plots; Y) `: Q. Y9 y1 G2 i2 |) B
set-current-plot "Totals"
2 y. D$ _" ~4 ^! x3 i set-current-plot-pen "turtles"
' J: Q* q. z$ L" Q4 k. T plot count turtles4 \5 e& Z `8 ], a2 w, `# C8 M* a" @
set-current-plot-pen "grass"" p- S$ i4 x1 \
plot count patches with [pcolor = green]: g& L, o# g: O. m" l5 I
end0 s- m+ E _- p5 N
可是运行时提示no such plot: "Totals"
' l( Y+ m; U6 w% q7 n5 qerror while observer running SET-CURRENT-PLOT5 ^4 t& Q3 i# H6 a0 ^
called by procedure DO-PLOTS2 o: e6 X) S$ H" V; Y6 f
called by procedure SETUP& i1 j6 ?( [6 i$ a# \
called by 按钮 'setup'
, G( r! R4 s; X% c' o+ n8 n3 ]求大神解答啊 |