我编的程序如下turtles-own [energy]
; v8 e: `+ ?/ `3 Rto setup0 B0 V( d& D" L
clear-all
: R: k5 D1 ~7 { y setup-patches/ B; s+ J; R2 ^- }" V( G+ C7 C& |" [# j
create-turtles 100
$ c& G2 o0 I% ^ do-plots
. v( `7 ]. F& J/ P ask turtles [ setxy random-xcor random-ycor ]
1 }% V% w4 j" w+ e# M: Y7 F/ bend. [2 A& w4 T6 V, y
to go( z* b$ z* ]0 I. ^/ a4 W1 M
move-turtles$ c: l+ b1 L( e: m
eat-grass
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check-death
8 g e5 }% v# L" N regrow-grass
% A7 c; d( n' ]# b/ C do-plots% g# U/ d7 j- s* `3 Q* a! p
end
. I! j6 f. s! M7 P8 Oto move-turtles
5 V9 U* j# ^% r ask turtles [$ O* q" g& e2 h6 n$ U4 E. V, T" L
right random 3603 Z) K: {0 g3 |4 p: p. B$ y
forward 1
8 b. O5 I4 z! N' ^: K; R5 K2 E set energy energy - 1
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8 V' W+ K! G% B- p5 H# Dend
, r& U/ f# B7 ato setup-patches) [4 e2 f. K* f3 q
ask patches [ set pcolor green ]; F3 B! \- e4 p' X0 }: l# _# I
end
" z; }6 s Y: D2 [4 B& ?- J5 X, ~to setup-turtles
4 J: G) |# e) \+ q$ k+ g% _& I2 J create-turtles 100
8 }7 h6 K2 C. X ask turtles [ setxy random-xcor random-ycor ]. g) Q4 P8 l* P$ N- Y* C0 q) {; ~
end7 m4 ^. G# P8 m" `& x
to eat-grass
) t$ S' w# D( ~0 }5 I" E9 T- q L ask turtles [
% S! A; u# {1 c6 [' V3 V8 Q/ F if pcolor = green [
, B; ^' g$ V6 o; p# N set pcolor black/ e; R& E& c: N
set energy (energy + 10)
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ifelse show-energy?% G; g' c' h6 u8 w; k' ^3 _. p+ S
[ set label energy ]- A" k5 \7 e" H! t
[ set label "" ]
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% L" }/ s1 \% K( T2 K% e5 t- Yend
+ a2 c( }$ m7 e$ L$ |9 ]" fto reproduce4 n0 y8 `0 D% h
ask turtles [- {0 `; U( B2 y
if energy > 50 [
5 Y; q- L7 X+ N5 [3 ] set energy energy - 50# O$ o. I: ]* O6 ~: a
hatch 1 [ set energy 50 ]
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]. B A+ x5 f6 N
end
5 K; i9 ^# x8 N6 lto check-death* Y! _; r: T4 q% r. v
ask turtles [
! Q! q+ T" ~9 }$ U if energy <= 0 [ die ]
3 a! \( T& z9 @% b2 E G ]
3 j) h% m) ^2 W/ M& Wend
* }1 S- ~5 u# |: t ]; Zto regrow-grass
3 b e& k9 |: n8 `! o; |& N& [) G ask patches [
0 i+ M7 C$ w3 ~9 S m x" T if random 100 < 3 [ set pcolor green ]
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, B- J& e2 ] u4 b, y8 C! xend- w; f9 z/ H1 b8 g T, q
to do-plots
# E. c& q) B( Y# `5 U) S* q set-current-plot "Totals"
% T% f. R8 Z: K/ l! s- }8 G4 s set-current-plot-pen "turtles"
1 P) l9 R1 y6 M2 F plot count turtles! p8 d- {" V7 \5 T! u& b
set-current-plot-pen "grass"2 d1 y$ l4 i9 ]
plot count patches with [pcolor = green]
3 ?7 y3 T5 m, \! x3 Eend3 Y: r& U# z( ^3 V3 |3 i
可是运行时提示no such plot: "Totals"
3 Y9 | k1 P: r$ r4 `' Q) Xerror while observer running SET-CURRENT-PLOT
5 l6 H6 A1 `) o* G8 Y called by procedure DO-PLOTS
; G+ _) d/ R5 _) P8 i6 I" w called by procedure SETUP- p3 A/ n8 ], @7 Y4 t Y
called by 按钮 'setup'0 T1 i" O6 O% ?9 K+ R
求大神解答啊 |