我编的程序如下turtles-own [energy]
9 J& ]* B6 _( _. Y5 ^$ Z; tto setup% k3 j5 g* s4 {' n4 T" ~8 M
clear-all6 Q& m5 Z2 P( G8 D" D0 o" ^
setup-patches: D4 b9 ~; }+ L1 d
create-turtles 100
& r& t8 U v1 X9 W do-plots
- M7 n) G! G" a ask turtles [ setxy random-xcor random-ycor ]
4 ` n9 }: V+ t4 [2 l& E5 ~end
% _: b4 m0 _5 G& |' @to go
. A" W0 v; n1 e4 M# f8 ~4 a move-turtles
. X2 t- E6 o7 @7 L3 P) y% y9 ? eat-grass
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check-death
' S& o& L+ N: D7 K regrow-grass# O; ]( i$ f, x |7 M
do-plots$ d5 D* A) r; I& A; ]) P' J& u u
end
0 S* _0 L4 t! k" V1 C2 X) eto move-turtles( f# O$ [6 f3 U' q; i9 B
ask turtles [
! ]7 D6 q+ n; t) s- P right random 360
5 z9 [. n9 b$ S# v! ~' A forward 12 X4 a9 c' u5 U Z& k
set energy energy - 1
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8 H0 W0 Y( S+ w# r! D: Iend* H( ^4 S/ r0 a" d
to setup-patches
& H/ ?, y$ C& V3 g8 R4 W1 Q ask patches [ set pcolor green ]4 E" h# ~1 u) z1 z/ r, d7 I
end
' ^) C( Z. C- J3 J7 eto setup-turtles; m% A6 \1 s0 P. v
create-turtles 100: f# \8 _$ \7 ^) I
ask turtles [ setxy random-xcor random-ycor ]# l& p7 ~, A( ]1 T1 U
end; [: Y0 i, X h
to eat-grass) c J) f* k% G/ w' F/ y) ]0 y& W
ask turtles [
; L# J$ p2 g4 v* F; _0 Y' _ if pcolor = green [. F, H4 M+ a+ p0 I8 z
set pcolor black
, G" k8 ^! y' d, [ set energy (energy + 10), [% d$ h+ U1 H
]' I, H/ [3 T- J$ I: e) O0 a
ifelse show-energy?
& B& F' ]5 R' P9 ?) u [ set label energy ]
1 L6 C, B5 k3 ] [ set label "" ]
1 q9 W9 H* A8 G/ O ]
1 Q6 {3 w8 j4 Y" K7 ?end
0 C# I/ D% P2 i8 @5 q3 Cto reproduce+ o- K- f8 J% i4 m
ask turtles [$ V0 X$ s! K* M2 J( E& r) l
if energy > 50 [
- m b# C/ P3 ^6 f set energy energy - 50) B j f( b) a2 z
hatch 1 [ set energy 50 ]
F5 y8 i) _1 J( d6 P( S$ B ]
' ~" ?4 B$ M# a/ x" H+ @- z ]
6 T1 M3 \7 S4 L9 @4 ~end
5 M) C# u) \7 pto check-death
8 c8 e0 d! A0 U' a ask turtles [
& }+ J- _/ n* O! M8 e if energy <= 0 [ die ]' Z K7 t, U/ u* b' Z
]
5 S2 I, g* r$ I# Q8 \) Xend) i9 y- R# v' G
to regrow-grass# h5 y' Q2 j9 ]* V) p7 I: E# V
ask patches [4 O! f7 o' i2 C/ I5 T( B
if random 100 < 3 [ set pcolor green ]" I* e/ D5 x0 M% U) D
]- ]& f( ^. K( E+ Q; x9 {
end
. B3 H7 E$ A) F5 } z4 y& }6 cto do-plots
# ?6 v( ?8 n# S" x: [2 p2 \5 w set-current-plot "Totals"
; y4 e0 x3 k0 S3 t0 M% ?6 ` set-current-plot-pen "turtles"
7 U7 x5 P8 l) P/ i plot count turtles
% X* k8 @, F0 F5 G. P# t+ J2 I set-current-plot-pen "grass"
& v7 n; k2 b) Q7 u, q7 R. H% } plot count patches with [pcolor = green]3 K7 c0 s) b" d" y
end
1 u! I- a4 D) Q9 a. j可是运行时提示no such plot: "Totals"! _- r) h5 T) A$ N" R4 m9 R5 l
error while observer running SET-CURRENT-PLOT
# S0 A) N) D# }$ {8 P called by procedure DO-PLOTS
) r4 l- V: @5 l0 c called by procedure SETUP
! \8 T {9 o) p* f) H3 d called by 按钮 'setup'
1 u7 N; c- Y3 W& F2 @5 p1 z. H7 y求大神解答啊 |