我编的程序如下turtles-own [energy]
6 g2 m8 d- B0 n1 z" f) Q$ E. c6 k! E- nto setup; G2 D I8 j f; k. q! _
clear-all: x* }* A$ s. t! w9 U8 L/ j
setup-patches% X, P* q% _: {, | z2 y
create-turtles 100
/ E* ~' u8 b& F$ D: d1 g do-plots
2 @1 b& K, I. P% |( O ask turtles [ setxy random-xcor random-ycor ]
+ t; T* H9 Q7 X* L: A f' Wend
( ]1 g3 X3 |/ S- I, pto go0 Z7 K& h" o0 v3 G% @0 r5 E. K
move-turtles
. a8 ~9 j# u, ^6 U eat-grass6 y+ u3 t, I5 k! w% P* P1 E
reproduce
' O" ]$ f' J7 h7 R( C% a check-death6 L9 Y4 |" y) b7 T- l* }
regrow-grass
. p& ^4 g$ }4 E do-plots: y* Q+ O2 H5 q$ r' i
end
+ X% Y+ ]: m) N, ?% b% W0 Z1 H* Bto move-turtles" B- @9 z/ h! [! R) s1 M' g
ask turtles [
% K3 D" l: D& C" c; a8 t6 p right random 360. q, }1 ]7 G8 X2 j& @
forward 1/ ]" q8 q9 y7 E) ]6 s/ V* k
set energy energy - 1' }3 V2 t3 {5 L8 m. i3 a; V5 k! A
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end+ L1 w+ e, i- i) N
to setup-patches0 p, ]4 _& h9 P9 Z9 W c
ask patches [ set pcolor green ]+ X- J$ t. F3 i! f& X, s
end
3 p W; L4 o6 ^7 I7 `3 `to setup-turtles, g" h7 }" h! e
create-turtles 100
+ F0 V, }, j. I2 }$ b$ M; n; {5 M ask turtles [ setxy random-xcor random-ycor ]0 D. H+ g# y+ e& B
end! p. J7 P- F2 J2 {- v
to eat-grass# l/ j! c: I; _
ask turtles [
. c! P$ m8 V2 Q6 }1 p, D if pcolor = green [
8 d) Z2 z2 E j* }" A set pcolor black
) P. Q% ~9 j' T( p set energy (energy + 10)
+ H7 v Y' |) K/ l) F' A9 V& L6 d+ E ]
: P8 Y% v0 _4 c' q+ D9 j ifelse show-energy?: Z2 a f0 a0 o# W
[ set label energy ]
5 a, p! \2 N f3 c, c% K8 C [ set label "" ]; T" w& ~# z! u, u
]4 x* O r5 i! D: {4 ?
end" ^0 t2 K, M4 v% @& I1 _- X
to reproduce: j" c# Z; G7 ^; f/ ~* Q
ask turtles [9 D2 S0 `" M, S. I
if energy > 50 [
, h p3 e- d) C7 ` set energy energy - 50! V8 v9 P, [9 m' Y, d- I
hatch 1 [ set energy 50 ]
( D- N1 o$ {, k% P ]
2 q7 q! u& M; Z ]4 o! |3 R* f* w0 s) M" L
end
3 x% j5 L/ `5 s1 o8 K% Y0 B& F* Dto check-death4 D7 Y, v2 F1 T4 \# U6 b( K$ a
ask turtles [3 {' p+ o# j# c$ ?7 {' }' }
if energy <= 0 [ die ]% P5 R4 @( g, }& H4 }
]
* e2 ]4 W" {8 P3 Q* J) ?( I% dend
# M6 }7 f: w1 y- v0 Jto regrow-grass+ f9 {+ M1 t# @8 W8 r
ask patches [
3 S% {6 _' B- W if random 100 < 3 [ set pcolor green ]
1 _4 \1 j) i) H! @ ]6 h$ s. b6 |5 }4 E! Y
end
1 M. K9 I5 d& M3 v5 {to do-plots
/ R2 P8 G: a b Q# f set-current-plot "Totals"; L h8 j- b G, [, h, ?0 t' @* Z
set-current-plot-pen "turtles"- ]: O3 }* s, t: \8 K; _1 k
plot count turtles& b: ^* r+ h e0 F3 F7 [" n
set-current-plot-pen "grass"- j& M @& [( M2 V6 s. U
plot count patches with [pcolor = green]
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可是运行时提示no such plot: "Totals", @( j7 c' D5 i' w& R# _
error while observer running SET-CURRENT-PLOT S1 H) }8 ~% t$ i& r& @6 k+ b! D
called by procedure DO-PLOTS
) I, E- ?- ]; e, d called by procedure SETUP
5 x; }) B1 v7 \/ s called by 按钮 'setup'# m. ^% ]4 d, b, `; V l
求大神解答啊 |