我编的程序如下turtles-own [energy]
/ ]* s3 q5 e$ d) d8 W! m: \- Rto setup- h$ n# u9 K# G- H3 C# `8 @: i
clear-all
; ]6 }8 C. t, x1 V' X/ ~ setup-patches
R+ _1 ^+ Z7 J0 X create-turtles 100
$ h' I# `' S. I6 i) r do-plots
& a% _& I9 ?' D& X% D. d% \& w! y% N ask turtles [ setxy random-xcor random-ycor ]
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to go
* f/ F9 `0 T9 @+ G' k. K" A6 F move-turtles% b/ }4 _( \. X3 {5 ?+ F
eat-grass2 \9 s6 N) q- K' [: u1 `, ]
reproduce
1 v6 \' c: F- g! f check-death* T6 W: t; Y1 U5 U: @# D$ ?: Q7 K
regrow-grass: \9 b0 R! r$ u, _! I' b6 u! A
do-plots
. ?5 Q% [( a2 M" ?8 f! [end
) ?$ ?# q& V* s ^5 ]- Zto move-turtles8 J: e; h }4 w9 j0 Q$ ~$ X
ask turtles [
- ^7 V) Q4 X$ }6 r2 E right random 360$ F) H6 y: H( z( p: G8 C0 Z6 u L
forward 1
1 Q* ^3 ]- i. `1 I; ] set energy energy - 10 l6 P! g; d8 N2 S/ i6 Y8 E# q2 L
]
( w; x& m2 G7 V4 P& t3 F4 gend/ p: k, m# b, ?) B8 p- j2 `
to setup-patches
9 E4 u/ i3 |/ B ask patches [ set pcolor green ]
" O# J% f" ~1 n8 m5 e5 kend' o8 y* O& N8 C+ A+ B
to setup-turtles0 N) t, [0 Z. Q
create-turtles 100
$ `/ v. |9 ?8 W ask turtles [ setxy random-xcor random-ycor ]
" u8 O s$ G8 v* z# N q4 l6 R: lend" b9 C6 g% b8 {; q) Q. S) }! W: d! }
to eat-grass
) y1 P( \4 a, W ask turtles [4 F. x2 R3 c; h; ~. D0 |* G" I. F
if pcolor = green [
/ D9 @, }2 B W$ i7 l/ M: d' T6 b set pcolor black; a1 _, y" Z7 T. q- d) ]- I
set energy (energy + 10)
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ifelse show-energy?
' Z( E9 Q# E# t, I; f1 |( U [ set label energy ]2 Y3 y" j* l9 q3 J
[ set label "" ]
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. j4 [8 x) x6 I9 T, y# Jend5 E. p4 P' L5 _& N* n. F
to reproduce
1 K. h' {& B0 q2 | ask turtles [+ B( |/ y/ M. Z5 }
if energy > 50 [- c0 x. f6 c0 \3 x% ]
set energy energy - 50
+ k# A' F! R; s4 M% a! c hatch 1 [ set energy 50 ]
& }9 C" z, E- K7 X ]
, f0 m3 @7 D# Y ]
/ t. c9 B$ @( j0 }* e0 A( Aend
& z! }5 p& O; A/ G* sto check-death
) I, R; n" x o3 P/ S7 n3 _9 x0 U# V# { ask turtles [
0 A: Q/ R3 R8 ?+ U# }1 |& P if energy <= 0 [ die ]
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end! e1 {# S% S; x, @% e
to regrow-grass4 u4 {4 S0 p+ s. r- O0 N" r, G1 M
ask patches [
1 m) b/ S+ |9 f5 s' v1 g( f if random 100 < 3 [ set pcolor green ]
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3 V* G2 ]* E8 A$ d" r1 B+ ]* t% Nend
( @1 U3 o9 a# q6 U1 D3 q; \9 j' ^$ ito do-plots; {: s2 p7 G7 z* | F5 p0 u8 _
set-current-plot "Totals"
/ X: i0 k, @* t0 w6 i& M# R( R" [ set-current-plot-pen "turtles"
' Z E+ ?; v: J6 ~- L3 L0 A plot count turtles o. Z# z" d2 ^1 c& L
set-current-plot-pen "grass"5 ^+ m1 @, c' |( d1 F# v
plot count patches with [pcolor = green]
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% X: C% @2 F6 M5 e8 c& ?- r! H可是运行时提示no such plot: "Totals"
( O# C' S& a: J: F" Eerror while observer running SET-CURRENT-PLOT
% Y. S% C. g/ X. g$ L' v called by procedure DO-PLOTS
# b) y* @; Y- d: Q) t called by procedure SETUP1 b! G4 o! r: P, ]* x
called by 按钮 'setup'/ t& V* s& g) x' j/ j% r& o/ Z
求大神解答啊 |