我编的程序如下turtles-own [energy]
2 W. @0 S. `5 ~7 T1 T" Bto setup
}5 J) y6 ]9 ~& H2 q% a clear-all: q2 W4 I a, h2 N6 G" J$ Z
setup-patches( ~% X1 O7 E1 \; {
create-turtles 100
- E- s( d& O. \8 e do-plots
5 L! e, l4 T. T% n6 z ask turtles [ setxy random-xcor random-ycor ]
" [7 n$ k( Y2 n# c% gend
3 h3 J- }, f! t! V6 T- I3 {- Xto go( k% x, d1 d6 j) _: c
move-turtles
3 O: `" B: m4 e, h$ x eat-grass
6 H1 u' }4 ]; } reproduce
( ~8 o' Z% N! [3 R! A5 N% G, O/ ?/ E check-death0 h; r( d* ~5 D
regrow-grass" b! @( r( B$ ^8 m& u8 Q
do-plots1 d; b- L' j: j; j( l, k3 I& O
end6 E, Z2 m. |0 V8 r* V
to move-turtles
4 Z! K4 T w- Y# Q5 H ask turtles [
0 }# G0 L* ]/ T J0 s2 H' k right random 360
& K# y+ M6 I3 z7 Q9 J8 p" t forward 1: G; y: @) c/ C; ]- G
set energy energy - 1
# u( y% u! Q6 B7 F- w ]
0 W' i& c/ v- a; K0 g) m2 ~end5 Z3 z6 c5 P6 J; a4 a4 W+ l7 Q+ T
to setup-patches
" I$ I7 p9 P# w* L% A. s2 b ask patches [ set pcolor green ]. K# n6 R- K% q! |3 q3 J }: H( K" f
end
% z o* k6 u* F7 F9 kto setup-turtles. t) ]; t' ^& U6 ?0 @9 y
create-turtles 100+ t0 [! ]; R7 v- j
ask turtles [ setxy random-xcor random-ycor ]# o- N( d: U. V0 G n
end7 [* p& {; e7 n- f8 z7 j
to eat-grass
8 `5 u1 [5 L" U: {4 X$ g+ j ask turtles [ Q) G8 @# ~: N m9 ~* Q' _
if pcolor = green [9 P0 B/ f$ M2 T4 `. j
set pcolor black
! b- I" i; \" S8 J7 f: Y. s" j set energy (energy + 10): x3 G6 `* X0 F. G9 N( F; I
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ifelse show-energy?- s+ D; S( }- E* E8 ~: `
[ set label energy ]
, {9 Y: Y! z! A3 n8 b [ set label "" ]
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end
% |' k% E) p% f2 Xto reproduce
# @& ?! D5 l- |) r7 w: V; `" v ask turtles [! s: `: B5 c1 ~# r, c2 q! Z
if energy > 50 [+ U1 E% C: s5 G7 F0 T% B: l
set energy energy - 500 h7 [, S1 d7 t& Y! z
hatch 1 [ set energy 50 ]
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( Z; s0 s$ D& g ]
a9 ]) |0 K$ p% }7 D6 c$ [( G3 z* e8 ?+ Hend
* e1 E9 H# B" ~4 b8 |to check-death' e" T5 Y) ]7 L8 Q! O
ask turtles [
7 |% Z$ s$ q4 Z; R8 Y$ z9 f if energy <= 0 [ die ]8 v/ ]) M. k+ v8 M8 ~9 [* L4 A
]( x$ {$ T, U: J8 d
end
6 p0 N( e6 z; X3 N: k/ X% V! F2 ato regrow-grass
$ ~ l0 V, g0 W+ D9 e7 X! A ask patches [
% A* R( p3 o. b! z% _ if random 100 < 3 [ set pcolor green ]- W! X- X1 j+ z0 R5 A
]7 M; K; D, I9 S
end% Q& E' b8 @! [$ _
to do-plots& E7 o/ a t. L0 |5 I: B
set-current-plot "Totals"
" P: v/ b0 o# n$ S6 T+ [ set-current-plot-pen "turtles"
! Z3 q3 l: E; f1 p9 } plot count turtles8 K& f; x" A! [4 W6 V$ P- O: x- I
set-current-plot-pen "grass"2 q& H: W6 o# _/ T7 X* o3 k; Y
plot count patches with [pcolor = green]
) w4 l2 o9 s7 aend% I6 Z* s4 x, {" M) U
可是运行时提示no such plot: "Totals"
- u4 Q4 c3 t$ A& R# berror while observer running SET-CURRENT-PLOT
# `1 V& U" d! i called by procedure DO-PLOTS
1 o; N6 a$ h g, _+ l" f2 C% v3 d called by procedure SETUP$ i; L+ N0 Y! a& c" n% ~
called by 按钮 'setup'
+ n/ w# z2 a. c3 X. x( J2 F求大神解答啊 |