我编的程序如下turtles-own [energy]7 D9 c3 ^3 i) Q9 B6 \& v8 ?
to setup- b6 g3 s+ e9 O& A1 J; ~
clear-all$ u' [( W0 o6 p5 i5 j2 X" E, E# i; @6 n
setup-patches
- i! N$ q$ \1 r1 E+ y create-turtles 1009 n o7 m) @7 c) N: @
do-plots
* P! p8 ^) q& a9 \3 L3 ~- h ask turtles [ setxy random-xcor random-ycor ]
' S2 W- t$ c: \) N7 rend
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move-turtles8 C& {. }9 X$ y
eat-grass# {- ?' I8 T" S8 r! f7 a
reproduce
' s9 e9 p- D+ p- `7 X check-death0 C% f4 Z' p. g0 F; E5 a
regrow-grass( v6 f" `2 e, A9 c4 I A" ^
do-plots# _" B: R2 m0 l$ ]6 K) x! p5 c
end6 r( b. c& S# ?
to move-turtles- S! h2 A* e) n& P
ask turtles [& r# O' N: |0 u* [
right random 360
* ^+ K( J. x9 q/ d7 s( i% ~) S forward 1
6 t( M* k6 R t0 i; w set energy energy - 1
7 F+ r: D( Z5 w& f* r8 I ]
9 z$ B$ E% a4 e- uend
. H# J. b" M3 S& hto setup-patches, K7 t j: E. P9 V
ask patches [ set pcolor green ]( J6 y& r. V0 e# y
end( h. ]' x1 h! S8 A9 J
to setup-turtles, e; A f0 K( x2 Z% V
create-turtles 100
- n9 r( o& p% }6 \0 K9 ?/ F2 b ask turtles [ setxy random-xcor random-ycor ]& p5 i" K* n2 Y5 q
end- I$ I3 ]& [/ e" y1 B2 N7 T
to eat-grass
, x! M% f) |1 L% Z ask turtles [
4 r4 u1 C% U: i7 f( }: d% U if pcolor = green [5 G7 i/ u, r2 ~8 ?2 @) v
set pcolor black
# @4 Q- a8 G1 T8 V6 @7 f0 M set energy (energy + 10)" r% {* S4 _- i! Y" T6 q. J& t
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ifelse show-energy?
% [7 B# |/ v( g [ set label energy ]' G7 i# m3 _) B. |
[ set label "" ]
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end& w# r) V9 ~# |0 {; X
to reproduce
4 I& k4 H; w$ @4 o ask turtles [9 E @$ A4 B5 o
if energy > 50 [' y- I3 f4 r+ @) n& f' _
set energy energy - 50$ o9 e& G c. z4 D- l" y
hatch 1 [ set energy 50 ]
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]
. ]9 x* ^0 Z& C% Y) D( Eend4 j/ J6 A( b: I6 `
to check-death, ~& C m. C2 f/ v2 v" A5 C3 n- U
ask turtles [
8 t8 ]8 X+ h% u2 v if energy <= 0 [ die ]7 H+ `9 I( j- k% p& h a% ~
]% Z0 |* a) r, G, w* D) A
end
0 E6 ]; x3 H- N/ W) p5 Nto regrow-grass
) e; R* v" J/ f. {1 L/ Q0 \ ask patches [1 x, E* a( E% I: p% q f0 e
if random 100 < 3 [ set pcolor green ]
0 {6 Z5 y |4 G ]" ~* ~6 t1 y: n' A5 q- @) J
end6 B0 s% K! C+ J
to do-plots0 ]3 ]9 b1 T, x- _1 r: T$ ]8 a
set-current-plot "Totals"% [! ] l/ @+ k' d9 k, m
set-current-plot-pen "turtles"& e& I N/ `, k5 f- g! V
plot count turtles
J U) h3 p+ o. L$ S2 t set-current-plot-pen "grass"
7 [) I! W3 M @! V& o9 E" T: p8 W, i plot count patches with [pcolor = green]
1 ~5 {2 `/ |( n0 Dend
! h8 w3 Q, R9 D& d" @+ r可是运行时提示no such plot: "Totals"
$ i/ m3 c# C9 Y; kerror while observer running SET-CURRENT-PLOT m) I3 \! Q3 H0 J* \: G
called by procedure DO-PLOTS
" b" q. i1 X) n) _' A2 S called by procedure SETUP
* d6 K z- Q/ V8 m- X; [& U% o called by 按钮 'setup'
/ R: @" l; y3 r求大神解答啊 |