我编的程序如下turtles-own [energy]% z7 [, b; C. L3 @
to setup
% p, b* T# P) m clear-all" M, O4 L; G' G
setup-patches
u# a% y$ b8 ?. K s; j3 Y; p3 i create-turtles 100
" f, z3 s5 T- s, |3 K9 {4 R% p" T do-plots5 \2 O& B$ }) z. o
ask turtles [ setxy random-xcor random-ycor ]
( y( r7 M% Q% Vend/ X* J1 D6 X: ]( m6 J' n
to go, G T9 x9 W: R; @6 R$ H& ]
move-turtles
! F: ]6 P+ r; ]6 n' o) R eat-grass' A3 c. f+ _- s; \# H1 b2 G, y
reproduce7 q' X' ^( p$ o( P S6 ^
check-death8 a( B& J" ]- W1 M V
regrow-grass
" i8 u& A3 p: `# m, K0 S do-plots, k( h, Q4 j& P
end0 R+ l* b2 A3 ~: A+ O! k6 v W: M
to move-turtles
+ t( G9 C9 ?/ j ask turtles [: L/ @+ p8 O* t4 _, r: [; i
right random 3609 W' l4 S+ \/ k
forward 1
" A) n5 i! d6 c6 h, y' H [ set energy energy - 1
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end
$ T4 I! E" h/ t* j: Cto setup-patches( f+ l4 v+ S& C/ U p
ask patches [ set pcolor green ]5 [2 X/ q' ?6 F Y1 W c( e1 C
end
1 m( V% h+ d; B1 k F& }/ }6 Oto setup-turtles
+ L$ `2 z- a/ R/ v+ J3 E create-turtles 100
7 q6 x4 } m3 ?0 t3 h+ Q' J ask turtles [ setxy random-xcor random-ycor ]
. d! y" U& i4 b }% _end
2 D* F8 v2 Y/ g0 z1 b- ~, H, L/ Vto eat-grass7 K) \" l" E, k5 R' R4 [
ask turtles [
* _/ ]! X9 C3 [: ~2 e if pcolor = green [
" ~. b- W8 w- g, x# a( C" N9 k3 P set pcolor black
, }: _% J* Z0 p: g2 w7 D set energy (energy + 10)
: K" n# p5 H) D( y/ F ]
+ F1 v, V( b& y% u# ?% b) T ifelse show-energy? y( C& c3 y9 Z9 m l: | T
[ set label energy ]: R+ T6 t# u2 }# u, ^ ^" x E
[ set label "" ]
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end
7 A c4 s/ ]1 h9 A" w; ato reproduce/ [* G) R. H) H6 W0 ]
ask turtles [
& e& T& F' b0 L4 U+ O1 p if energy > 50 [
; j/ C& n' W, b1 S, A set energy energy - 50 b4 I% Q: Q' H5 H s
hatch 1 [ set energy 50 ] n% x+ Z$ F- B
]
% y" L" f: ^" w0 K/ N- N9 R' G/ q* O" Y ]( e% }/ ~! p: C4 u# _
end
! [, Z! Y# Z3 v% q: v# l7 pto check-death
" e* X6 W' q; P9 c8 `& ` ask turtles [
% y0 Y# E* Z" `! | if energy <= 0 [ die ]
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& H7 }% F. W) V0 qend
9 d/ D [3 X9 m hto regrow-grass4 a- w5 U) E+ V, i* U# i; P6 o& s
ask patches [
$ J9 [3 p* g1 V0 E* H if random 100 < 3 [ set pcolor green ]
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, ~! D, h* Y2 E5 Uend
5 ^ ]* ^4 t% r" q+ }) x- sto do-plots5 b" {8 B$ X+ L
set-current-plot "Totals"+ v; M7 ^. H) d, P8 Z6 o
set-current-plot-pen "turtles"
2 }5 m3 J% `5 O$ Y; v1 X plot count turtles
. o2 t5 K* ?- T0 o* ^& l set-current-plot-pen "grass"4 K- d# {2 S% C& E' }/ ~/ w$ x
plot count patches with [pcolor = green]" F3 _: N+ p0 G9 d
end& v2 `' B, o: W8 p( _
可是运行时提示no such plot: "Totals"
! o: q' }0 s9 ^" ~8 n; l, ^error while observer running SET-CURRENT-PLOT
& U. n6 \, ]5 ^) @ called by procedure DO-PLOTS0 G8 F9 W/ Y. H
called by procedure SETUP
; |' h& P' c) Q( R8 a3 A# H called by 按钮 'setup': O+ V: w5 @8 E" P) h% \* ~! X
求大神解答啊 |