我编的程序如下turtles-own [energy]% x, b* N v, r8 Q( e
to setup
5 Q5 x4 G3 M8 G) w' s! Q, G clear-all
6 F4 y( ?6 f7 k4 w setup-patches
( ~; e5 Z! t" Y* S3 v5 V create-turtles 1006 j- Y% d0 R- i/ R* y3 N
do-plots. T1 h! ?2 s$ F& T+ ]: x
ask turtles [ setxy random-xcor random-ycor ]- a; \$ g' y6 a
end
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move-turtles9 Z4 n: Z# @ g0 Z t- e8 b
eat-grass
) T0 Q- e' d' ^" Y6 `/ }1 z6 r7 q reproduce
: K) H z% n6 }0 k' E3 ]; [* h, _ check-death ?8 G# h0 x4 t- t U* j
regrow-grass
0 S# G l& {/ Z" W* [" p) I' u do-plots
1 f+ X4 q. C3 q9 nend: r8 b" Y, p+ {. L8 I- z6 U6 E
to move-turtles
) z" |/ b; y9 s, ^) k, C0 g8 g1 C ask turtles [
4 V- p) S4 X! x& B9 Y) }( i9 x right random 360" e; C9 b- x7 v9 m8 I3 d
forward 13 V4 e$ s6 ~; c/ F( C$ k! l( I( w
set energy energy - 1
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7 w7 `. }- G8 X9 T0 k% Dend' i3 [4 l( }! G9 q
to setup-patches+ }8 a. _# @2 G& v8 o# a
ask patches [ set pcolor green ]
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to setup-turtles
" a3 r1 `; m/ `+ x4 W5 X! I4 F3 l+ e create-turtles 100: W' J& Y1 E* j6 I1 w
ask turtles [ setxy random-xcor random-ycor ]7 u( `! [4 C! u
end' _5 Q$ l0 `! z1 H3 E* a6 ?
to eat-grass
* I6 I+ A0 w7 ^$ m# y* T* _ ask turtles [
" d# a& \% O i) K, Y, w& c if pcolor = green [; a; P' _5 w' p3 S
set pcolor black* @' q3 V6 i2 C9 F4 Q1 J' }) P& q
set energy (energy + 10)! w' u! N+ D- j: k W
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ifelse show-energy?
; d1 i% I( L8 w [ set label energy ]
- @8 d- [) _( [" n: U* P$ S [ set label "" ]$ B: k) J! b6 R$ N7 }& I
]
+ B2 v$ D2 B h1 y- nend, h, r9 ?% y& G$ k4 X* ]
to reproduce2 T! j! d* v+ F2 g5 Z% T. p
ask turtles [
# O* E! Z# c( x$ h if energy > 50 [
; W9 m% r9 |/ Q, ^8 B/ A8 X set energy energy - 50
+ w- d4 o) W; I/ v# s" B hatch 1 [ set energy 50 ]2 f( u0 K; O" V, B E, n1 P
]
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end; C% @3 A$ X: d: v Q9 @ s9 |
to check-death) v3 M, Q& i; m. h3 ^
ask turtles [
# ~* u* g6 Q( H+ `! O& q9 p if energy <= 0 [ die ]
( i8 x9 O3 | ?/ h ]
3 M0 Z; `9 s. B" ]# F' s9 h Rend
# `3 c2 G. @( U0 pto regrow-grass
0 G( T1 l8 E& [2 T ask patches [& V/ l+ G h* ?! G' a3 x; V
if random 100 < 3 [ set pcolor green ]
5 D* @, }1 w2 s7 p1 V: j ]
- Q6 s8 T1 O+ X5 W$ Eend
6 l5 X3 U3 f" ~$ x/ S; uto do-plots
9 I" s2 b o' \6 a! O k9 Q set-current-plot "Totals"/ n& \ ], u* p8 r
set-current-plot-pen "turtles"" @) h9 J$ }9 G* G: P6 I _
plot count turtles, L* q4 r# Z4 b2 i. Y7 j, k7 f
set-current-plot-pen "grass"
/ i$ i( u: W! L8 P plot count patches with [pcolor = green]
2 _1 U+ y4 [0 x; D1 c3 |0 r, mend
& t) ], e( J0 Q3 P7 G可是运行时提示no such plot: "Totals"
) `- \4 H. _8 H) d: v2 P+ K* p6 lerror while observer running SET-CURRENT-PLOT
( b) r/ j1 }) D9 G7 C called by procedure DO-PLOTS
( u/ ^3 L& d4 B d: a( U& ^5 q- w called by procedure SETUP
, m u! U3 ^7 V# |$ x called by 按钮 'setup'
8 E% V3 I- `7 f* ~! J' @3 j7 @求大神解答啊 |