我编的程序如下turtles-own [energy]
1 \& Y6 ~, I8 x7 jto setup/ @% s% ~2 v* j% A+ g. ^
clear-all6 m1 k$ L' l& f; h( K
setup-patches% y9 C/ h8 Q+ e9 Z9 @/ t* r! O
create-turtles 1000 z" f t' K; g, ~
do-plots
# P- T2 n, L1 W ask turtles [ setxy random-xcor random-ycor ]
; X; @, R* T) T9 r9 g3 N0 j) hend$ T( X }; K$ O/ Y/ u1 y0 r1 H
to go
- v4 u% G3 {; Q5 e move-turtles
$ \# U p! C( p2 @( T eat-grass
c8 a5 U2 J* X$ e' H+ { reproduce& |4 J# g1 y2 J; Q0 h( u% X
check-death* H0 ?0 e l9 G! N; V* @
regrow-grass
" ~ I# h4 N, f+ C: m) u F do-plots
1 q* [/ y: H! d6 @6 mend
: j& I7 f' s4 Z/ P- m+ H% Rto move-turtles1 z4 U, { b4 _: G+ G
ask turtles [' |- j3 I# M; R, h
right random 360
7 Y$ K p- W( `) a forward 1
% J2 W# X. O& t2 x+ N% @$ O set energy energy - 1' F0 n( C/ L1 Q' e Y1 }; E! d2 g
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end
" N) D& a6 A2 ito setup-patches
* O2 i* \& {/ d% ?/ j* r/ P" Z ask patches [ set pcolor green ]
1 D& G; G+ |7 h. }0 kend% ^6 a9 Y) B: v8 P
to setup-turtles
4 {' |1 h5 O! p1 _) E6 X; ^7 h create-turtles 100
0 Y( a+ ?5 N. l; ?- o- m ask turtles [ setxy random-xcor random-ycor ]
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to eat-grass( o+ `) H+ Q$ @: b
ask turtles [& _7 j4 i5 ^# c) I: Q+ b
if pcolor = green [) n9 W" k/ G( E( y d
set pcolor black
. o Y( G0 [( A set energy (energy + 10)4 |8 A) ?, t5 U" `% S( T9 F* y! m( }
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ifelse show-energy?& d% }8 U1 o2 \* V. h
[ set label energy ]
U& Z6 T' m5 s! M# N7 R/ R [ set label "" ]" i1 c. f& b9 f* b' z! T
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end
1 K4 S' f4 `5 i1 m |to reproduce) ]; ^/ k+ f8 a! @& P. d
ask turtles [
' @4 K/ b& G) G4 ? if energy > 50 [
- T h- Q2 v# a1 g# @8 T+ M set energy energy - 503 l. R& m* Z4 y X: a$ Z
hatch 1 [ set energy 50 ]3 c: ^% K4 q) D) W, d
]
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end
" w0 F! _1 O1 o, O0 R' fto check-death* h F4 Z) Q2 k: i7 D5 E5 C
ask turtles [
$ [3 c1 ?/ m9 d8 j if energy <= 0 [ die ]
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# G8 j' ~! p9 Y; g4 B& oend) I1 p/ r% `- f6 U) p4 B
to regrow-grass# M: Y) S) H2 L
ask patches [
' T0 m; B; N$ F if random 100 < 3 [ set pcolor green ]7 L+ b/ t3 ]+ ^8 K( g" |
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end/ L( @2 I6 a! |) U& _
to do-plots
W: O3 Z* K+ c* i/ I set-current-plot "Totals"
8 q; B; V6 P" @0 A7 I' | set-current-plot-pen "turtles"
$ ~( a) `6 H3 B1 m* ~( Z3 P plot count turtles
: x! {4 m1 b9 p( M: V. \ set-current-plot-pen "grass"% l$ d. l' {9 \9 K! K
plot count patches with [pcolor = green]
# u' v, c, ? A+ mend
7 U2 G0 P$ Z, o7 Z. j/ L可是运行时提示no such plot: "Totals"8 h, c/ ~. [8 N$ a& e* Y% ~
error while observer running SET-CURRENT-PLOT
7 V4 W$ {% m4 L' i+ K c1 d5 y. ] called by procedure DO-PLOTS
, d' d. l( E5 r+ z$ {; Q# o called by procedure SETUP
" L, o4 x6 Q! O6 b0 Q called by 按钮 'setup'! ], u: X7 a- G9 ~4 N* S7 A
求大神解答啊 |