我编的程序如下turtles-own [energy]
# l5 n6 {6 _9 n$ N; q; Sto setup) P; u* `6 V8 B, f6 y
clear-all: I6 F8 ~* X' w& [' g" S- v
setup-patches( b" x& s9 {! q: ]- p, d: Y
create-turtles 100
, A- T, E% ]' [0 N1 |7 T+ X do-plots, C N$ P0 a0 x# f6 C2 B, R6 K
ask turtles [ setxy random-xcor random-ycor ]
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to go. D* g0 k' T6 c1 z# k6 J+ |
move-turtles; [6 R5 w7 L+ F3 e/ g
eat-grass
; z; r9 ?& U2 v: X2 [ reproduce
1 t' h" V' F+ a9 n2 |5 Z2 s5 r check-death
/ F7 F/ L$ C# D5 h( b regrow-grass5 P- U1 f7 J$ h+ W7 | k
do-plots
: Y3 n# R' _, }end
- o6 D, b: C' z2 Fto move-turtles0 d6 p+ ^* M9 E, ?3 y; _5 x4 I
ask turtles [
- _& }, ^% w/ z a/ C right random 360
/ ?. K1 a7 A1 R. H6 X" G forward 1
. G Z5 }* D- r4 u# z9 W set energy energy - 1
+ K& o$ p; Z% b" C3 J+ B i ` ], d2 D6 \; a0 F9 e
end
: I9 ]1 x+ K% p( n/ p( F0 Gto setup-patches
+ n9 ]* p: ]) [" u ask patches [ set pcolor green ]
- x% o0 N) d5 [$ nend, W- y K0 ]+ k' Y! i: o+ X
to setup-turtles
H) I* k1 h8 j* @9 p) T- Q/ ] create-turtles 100, k+ u2 P- G# ^+ O- ?
ask turtles [ setxy random-xcor random-ycor ]
9 p5 W/ R4 R q4 vend
5 H# D9 U3 Z: d7 Z6 N; G \; n mto eat-grass
" T# t' i- D+ Q# V. P7 x5 b9 k ask turtles [
3 M% J1 C' w5 H) a4 b" s+ E( D Z if pcolor = green [$ f4 T% [: |8 z" ]5 d8 l v
set pcolor black5 V0 T' M0 B# b; \
set energy (energy + 10), q7 R7 i. z! s/ E
]
5 t0 ]* Q, J/ F! t2 x0 O6 l ifelse show-energy?$ A5 j% [4 v! r: `4 J) J. A
[ set label energy ] ]5 ~) o' J( [- z5 ^$ ~
[ set label "" ]/ ^3 j- |6 d$ M. L
]
4 Y) t5 M% g/ Q" s) x* m: c# gend
& E: |. d1 m# S+ {to reproduce' O3 N& x7 `: X( v$ k
ask turtles [
# f$ b( S3 a7 n2 z Z3 G if energy > 50 [: }; k' Z3 \3 a! ^
set energy energy - 50
0 S# G7 N8 i& [$ G hatch 1 [ set energy 50 ]
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]
( U8 Z- X/ \2 m X/ h# r" Qend
1 U( \' ], X* W! O' j( Sto check-death
7 |% o- f) l6 z! h+ { ask turtles [" D3 n) }$ p3 P" w$ e
if energy <= 0 [ die ]
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end
; ]( d# e+ K; z% }to regrow-grass
0 u' `. [( N1 l ask patches [8 k8 Z. a. e, I
if random 100 < 3 [ set pcolor green ]
- R5 u; L% r5 ? ]
; C# ?5 {5 @6 r, Gend' e9 M) W2 _" e+ a9 j8 o
to do-plots6 R& B+ w' o" B( z3 N# M& K0 W: M
set-current-plot "Totals"8 c9 N7 O6 C8 u% h- e+ r4 }& {( A
set-current-plot-pen "turtles"
: H* E& m. U$ ^! o8 ] plot count turtles
! e' A% | y9 ^) H+ D set-current-plot-pen "grass"
, h" `/ p& e5 o; W, c# B1 \ plot count patches with [pcolor = green]
. j ]% T/ j _end
$ u& E1 j; k6 y- W$ ^& o7 F3 a可是运行时提示no such plot: "Totals"
. X% g1 @" E+ F. f, rerror while observer running SET-CURRENT-PLOT3 y" G; k8 U4 V: v
called by procedure DO-PLOTS
, s8 O( O: s- F9 c3 J+ I7 s called by procedure SETUP
0 Y3 ]4 t$ ]) e; r called by 按钮 'setup'
7 s+ {) E$ [" o- P& ~2 E X" O! ]4 ?求大神解答啊 |