我编的程序如下turtles-own [energy]. M2 r, @+ i" y
to setup
+ @: Y. v' M0 U1 |, }, |+ r4 E N clear-all7 T/ O1 T+ k C1 ]9 U* O8 m, r
setup-patches
- H' D) ?& m/ E# x6 k. z9 ~2 i create-turtles 100
, T) v" ]; d. G do-plots
5 ?* q4 G/ ]# h ask turtles [ setxy random-xcor random-ycor ]2 F/ R7 o+ \1 |4 r2 X
end9 g- M1 I* M& {' q3 X& ~2 t9 N' g
to go3 g0 ^, c3 Y: W
move-turtles# a. M4 n+ V9 `# Y4 n: s$ V a
eat-grass; M, x1 q$ |; K! Q
reproduce8 q$ t0 K2 ?3 R; @% |8 L
check-death; a: T+ J6 n" \! k, R
regrow-grass! ^% c) ?' d9 j2 J( H1 O+ E: _
do-plots
) z9 y; H$ m2 v" z: N/ }/ U/ M; Cend; e/ w4 B9 x; F
to move-turtles. H0 y8 J7 O4 c8 t7 s& X
ask turtles [/ c D _6 W2 K( c/ [' _' v4 S9 [
right random 360) @9 c# n$ L2 `/ P% u5 C
forward 1
* _; _7 p0 u2 n/ g" A# T set energy energy - 1
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end
0 N. t1 }; g6 J6 Tto setup-patches
. H& Q6 t; I; e, R& x ask patches [ set pcolor green ]
; S x7 {. n- o2 }, C' L. [end
5 U) O$ g u% a' J0 Cto setup-turtles2 Y6 H% p+ \% {4 z: Y5 a
create-turtles 100 s6 W2 ^8 c4 |/ f$ @# j1 I( f
ask turtles [ setxy random-xcor random-ycor ]0 i( n; D0 D+ u( D3 }
end. ]& L/ `2 |) {+ T& W% f
to eat-grass
* ]9 H" u& a4 t/ U" @9 R ask turtles [* m0 x4 \2 f, x( g3 e+ |2 L
if pcolor = green [- `; t# I2 u* ~* c( b8 d) F
set pcolor black
" B' P. S4 u" Z1 J set energy (energy + 10)9 n+ X. o/ t; ~5 ]1 M% ~' |/ o
]
3 u3 @) \) o3 E! C) o ifelse show-energy?4 X1 U5 D8 V6 w
[ set label energy ]
4 ?0 U2 ~$ r$ m" c [ set label "" ]
, j0 c$ s( G6 y" h3 l ]
7 l$ V- X( R& N2 }. {1 {1 N: Nend, t& o: ]" B$ b) k8 h
to reproduce2 Q W! z7 @1 E) p- I
ask turtles [8 U- g1 [, S! M0 B8 e
if energy > 50 [
2 ]" K2 n, f& V4 c set energy energy - 50
+ r9 t0 g: j, N4 J hatch 1 [ set energy 50 ]
1 V; ~! x5 K ~# l4 c! v9 O ]
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end
~8 J& { W, K7 |' q) n+ M' gto check-death9 m! C9 y& a) ]
ask turtles [% x9 H- o8 Z1 H: i3 G) d2 v+ o6 x
if energy <= 0 [ die ]/ ^) l. h& R) ]: \2 _* r* z1 Y
]
$ ^" c }6 \) r% O, ]) M. U$ Nend
, \- t8 j: J" v" @" {to regrow-grass
% C q8 o- \* i/ a1 x" z ask patches [# c7 V4 j: L3 K4 V8 L$ H+ ]
if random 100 < 3 [ set pcolor green ]
9 D0 @) a& a. t ]3 ^, K+ J# ~/ P& }7 T! A, ?
end5 Y( |* g5 I( H
to do-plots/ f4 I! j H- | A4 i& K
set-current-plot "Totals"- |0 t" c0 o4 s/ e! {
set-current-plot-pen "turtles"
0 f6 c, c, a3 ^( s/ n7 P9 x, e0 h9 ~: s plot count turtles6 o% \& `/ Y' a$ z0 ]/ p! f9 V% h
set-current-plot-pen "grass"
! I; |# s S5 R! A plot count patches with [pcolor = green]
; r- a) O' m1 T9 m" q7 [9 }4 \2 Q/ Pend
- ]8 B- Z Z$ E可是运行时提示no such plot: "Totals" v6 G3 p% X& L# t4 o
error while observer running SET-CURRENT-PLOT
/ q. Z0 o: U P; ~8 f$ h7 H7 z called by procedure DO-PLOTS
3 |2 V5 G: S$ s% h0 C called by procedure SETUP, @: ?! E! u& R, X( F3 r& Z8 }4 T0 l
called by 按钮 'setup', F+ j4 R; F: d2 h
求大神解答啊 |