我编的程序如下turtles-own [energy]9 I9 N5 E" }/ Y
to setup9 j7 _. ]4 `6 ?4 E* B! ~9 W
clear-all
6 v/ a. T) r% Q# m setup-patches( M4 c9 Q V2 n& D- o
create-turtles 1006 k1 y7 ^1 [- B9 t3 ~: P
do-plots7 w. u" S9 M- Q# p$ J. D2 U
ask turtles [ setxy random-xcor random-ycor ]
/ C5 i, a; _6 c/ K' l% d2 R- q1 b) Dend1 z/ ]8 `5 T; `0 G, @3 D
to go
" j& C; _2 u) W0 O Y move-turtles
3 p( C$ W( y- A r! O% F- t eat-grass
3 j \ q, `6 b& V ~& z reproduce
% m) z& c- X- B check-death
7 \) F" W2 _* a: b0 Y' `* l. t regrow-grass
& [; L- ^3 u% X' P a: m2 y do-plots
# O6 e& }' ?+ i) K& E# d6 l* I; Kend
2 u7 Z2 t( W2 p# e) ]& ato move-turtles
( A/ r: {0 c0 S/ w$ z ask turtles [/ N5 q: ]3 O1 q5 j* |
right random 360
$ L; q6 ^7 E& j, T forward 1
9 m6 a" B& h5 F V4 c4 P6 b set energy energy - 1
% i6 `4 ~" l4 h9 ?3 d, W2 Q# M- F ]0 t% f$ a- N3 A
end+ O9 H* w* y3 g& h4 j
to setup-patches! E' I' u( o7 o- ?! O
ask patches [ set pcolor green ]8 Z& P$ t# A3 \( t: b2 A% `! T/ i
end
5 L, a! \! R. b8 k9 c, Jto setup-turtles5 G1 n# g% {5 p
create-turtles 100$ H, V1 X' K2 \4 x
ask turtles [ setxy random-xcor random-ycor ]* ]5 m: Q4 q0 G1 }$ W$ ^6 `: m
end
1 Y. S+ g- q$ P2 U' }. y/ c- \to eat-grass2 V/ h$ V( ?: a- m% ?6 z
ask turtles [
- m2 V7 G! m, i$ e: i# _5 ^ if pcolor = green [4 b1 l2 D0 k/ S" d6 A
set pcolor black( Y. Q4 g9 C) h8 R# k1 B
set energy (energy + 10)
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ifelse show-energy?
2 Q6 f0 Q$ v- g# g1 v [ set label energy ]: a, K0 P) ~# v2 Y4 R
[ set label "" ]
8 n9 g) h9 S2 f2 H0 o ]
9 C8 i* k- H1 v$ `$ hend8 {$ z3 a/ r& Z
to reproduce6 _, H# l4 {! C* |
ask turtles [
- u1 E% j4 S5 {& C: D* S if energy > 50 [$ b: {. z/ d* X. Q
set energy energy - 50
* |: h: k$ g) y hatch 1 [ set energy 50 ]
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j) H! l$ B) U ]
: [7 U. e+ z, }) i H2 C, xend( S8 Z5 ]8 j: R
to check-death4 ~. e0 I* K+ G* I( r
ask turtles [
/ k& {' a. J- w' I h5 M/ t if energy <= 0 [ die ]4 J7 c3 P$ u3 ]* ~; N
]
: D/ t. [+ b$ T( I' b/ [1 t) Jend8 }& q6 e* U& Q" Q1 k) v0 d i$ l& |, f
to regrow-grass) l# R& [0 m( K
ask patches [
! E7 D. q v: e6 @8 N if random 100 < 3 [ set pcolor green ]
* ]3 Z# _9 q! }& [# S% z ]6 _% j9 t9 m0 ?
end
1 ]* {1 k: a% E3 a9 ^. n) lto do-plots/ ^0 @7 b6 X, f
set-current-plot "Totals"+ @6 }9 n9 y, y+ l% k6 h. l" r- }3 l
set-current-plot-pen "turtles"4 T S0 z& D1 T% O. t
plot count turtles" E. @& N& v2 c
set-current-plot-pen "grass"
2 C" b4 L: z) O" b2 z. U" n plot count patches with [pcolor = green]
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可是运行时提示no such plot: "Totals"' E( b# \: A' @( L% e+ B
error while observer running SET-CURRENT-PLOT, ^5 J- v. H" m; P+ l
called by procedure DO-PLOTS
8 F: Y; J h+ _3 q7 _ called by procedure SETUP
7 }3 T4 n1 p% o8 P called by 按钮 'setup': g4 C( J/ V6 i% [
求大神解答啊 |