我编的程序如下turtles-own [energy]
( \- _; v4 r5 o8 t- j! Ato setup
% y9 |! F v! w0 M- h: t% D$ N clear-all
2 H" f y+ p9 o! B7 u( h setup-patches
: B/ c3 _4 \4 y' @ create-turtles 100' D" x5 B/ K- X, E
do-plots
+ h; O4 t/ N1 y4 h ask turtles [ setxy random-xcor random-ycor ] }; I* q4 P/ ^
end
" j7 h+ L6 E- _" @5 nto go( @+ J4 k& _, H% N4 `2 C
move-turtles
% G/ v( f$ G) Q: Z eat-grass
0 n6 q$ ]6 p* F9 J* a3 ~ reproduce1 H7 k8 M5 K( F( t- Q
check-death
/ \( e0 M+ b5 X C regrow-grass& X3 y: ~$ s3 C: e( i3 }
do-plots7 M7 @. b% c2 B O$ l" Y
end
1 L- r7 m' _1 Y* _5 e( Nto move-turtles
; Z1 r8 I5 O: w; b% w ask turtles [
0 A% i9 F6 I/ T; l' x6 k" r right random 3609 k( q; l2 _8 S; k
forward 1
' H" O) L m$ z, J# } set energy energy - 1( A+ `. A7 f( u6 d
]! b/ x$ G& z1 R; G' k. U
end# T% T: O" G2 }: o W2 w/ T f
to setup-patches: [: z5 g0 X% M" f' U
ask patches [ set pcolor green ]& ]3 j' R# L: c0 i. R" w, I$ T0 X
end- A8 a9 {( O& e
to setup-turtles f+ L. O: O& t
create-turtles 100
! p8 z6 i" L7 d9 p ask turtles [ setxy random-xcor random-ycor ]9 Y3 h! s2 D6 x0 u$ Q
end
) X8 z' G n. l) `( _+ u# eto eat-grass$ t: k; u) h0 I
ask turtles [
" J* {8 Z: r; n1 W; \5 Z$ o if pcolor = green [$ P+ c# _. d2 m! H H
set pcolor black- Z$ O) L* r& K! n: w
set energy (energy + 10)% a- K$ N! H" n. s
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ifelse show-energy?$ B7 |, H% R" X2 w0 J
[ set label energy ]) w7 H* _! `* i* f$ |
[ set label "" ]
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& O8 x' Y& f( @. O0 Z( c- M' lend
" {0 K/ v* l' W% V9 Q& h0 Qto reproduce' L6 k8 F4 D, c( d5 W, C: a) b6 c1 c
ask turtles [
2 y' j, |3 E# L K; [ if energy > 50 [
+ p' {/ V: s# h0 H: V set energy energy - 506 d" ]) L# K- q I+ j
hatch 1 [ set energy 50 ]7 \( ^4 z! ?0 ~! y7 k
]
$ u) B% `; W) R) r ]
; Q) E3 V- u" H7 Pend2 X% F+ Q: g; ?
to check-death3 l& U1 O# q3 K/ r
ask turtles [
) B) a3 W, r' ^% u7 W; | t if energy <= 0 [ die ]/ h( R; i5 k1 M. t7 u
]
) F; E9 s0 Q1 s" H+ ~8 n3 {! Oend7 u4 p; y4 U2 z" o b
to regrow-grass
' l; ?0 n$ G3 Y# y% f ask patches [
9 C( i Z x: l" a d' P if random 100 < 3 [ set pcolor green ]
" O! r/ q0 ]/ K/ q4 s; \& { ]
( K" Y, W8 g/ { mend- Z( V- D5 ` @5 Z/ f f
to do-plots
- d; C/ B. c, K- v set-current-plot "Totals") X( A9 ^0 l4 \
set-current-plot-pen "turtles"6 O6 I( x4 N- s) S$ I- A
plot count turtles
2 b% Z% D/ W: E1 K I! ] set-current-plot-pen "grass"7 z# Y* u. O7 U% f
plot count patches with [pcolor = green]9 y( t0 }4 {4 Y5 O f6 X/ f" q0 q# [ P
end
?) B G3 @' i$ Y0 b2 S* @可是运行时提示no such plot: "Totals"5 D# X# R9 T* q8 q/ ~" I, N1 g
error while observer running SET-CURRENT-PLOT m2 q/ p" K A" F- [7 d
called by procedure DO-PLOTS
1 l/ P8 Y4 k+ `2 n2 ?9 x called by procedure SETUP( ]3 g0 r# W2 U' w
called by 按钮 'setup'
* k4 {: U, P: v2 S5 j求大神解答啊 |