我编的程序如下turtles-own [energy]$ M8 v* k' k) ^' o* g
to setup1 f R; s0 _$ V4 U/ |
clear-all
' F% p d4 c' Q4 `# ]- I7 `( r setup-patches
! K& G8 @$ ~5 ]/ t$ k2 J( n create-turtles 100" s/ \$ o( }. V: |& T
do-plots
, B. }4 r7 H {, }5 U$ X ask turtles [ setxy random-xcor random-ycor ]; j: h: c5 S/ T; Z; N7 t: ^# n
end
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move-turtles3 l4 Y; A& r1 r% }; Y4 y: C
eat-grass4 r8 s# [0 [% X$ T
reproduce( G, c* p% o; V% c$ F+ d: ~
check-death
8 w/ f3 j) _1 B( K5 w. ]/ [2 d regrow-grass# g O1 @; ~7 M) k$ p }! R
do-plots
) r0 `! e. C; Q9 z8 ?end
7 W5 P( _# w# f6 n- Fto move-turtles
! e: m' F/ q# w5 @2 ]' X$ ~ ask turtles [
, ~/ R. w1 S3 A+ u: U. @( K( i* x right random 3608 _9 i, D& z" d& w# [0 ^, C
forward 17 H' }) q. b# t# N5 f
set energy energy - 1
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to setup-patches: J& O: s+ Q; W! c" f) z/ A I4 G# R
ask patches [ set pcolor green ]
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0 G8 P5 ]9 g7 t U2 zto setup-turtles
( \- i+ i8 Q2 x9 A create-turtles 100$ I) M: m: P! ~6 r5 ~0 { k& Z) Y
ask turtles [ setxy random-xcor random-ycor ]
! Q7 c7 C: y: R3 k- qend
' R& I8 X& G1 I# B9 r/ yto eat-grass
, I# N6 B( s/ n$ \ ask turtles [
5 f, Y! V# D- D0 o) b# ` if pcolor = green [2 p4 v. w5 U2 Q8 g& J9 i: z
set pcolor black2 c4 e, A" }; b: ^5 @
set energy (energy + 10)
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ifelse show-energy?$ x; }- H/ }: y; F2 c
[ set label energy ]4 u% n1 d t+ C; ~
[ set label "" ]6 J) [) R% R8 K
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end9 w: Y( ], S; m9 P
to reproduce+ u4 k- z* F3 G
ask turtles [
$ w4 q9 W. {% h3 J/ Z( U if energy > 50 [
6 ?5 Z6 @9 A+ `4 r! t# i; F set energy energy - 50
/ H6 M2 M- t0 @% m+ m' R hatch 1 [ set energy 50 ]" o9 c5 a9 l9 G ]
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]
# J8 b7 I4 L) Kend
( v* W! f1 C; X! W: Ito check-death
* J3 ] _6 X3 W ask turtles [
, H6 t: y! `/ U- D* e1 _- a if energy <= 0 [ die ]
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end/ q/ F3 `% O: M6 F: O
to regrow-grass2 g) W7 B) H0 ?5 C: Z4 H a
ask patches [8 }$ ?4 o2 [. N$ k; A$ D
if random 100 < 3 [ set pcolor green ]
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end
% @/ P. \( Q9 ?1 m) L! p# sto do-plots' f4 s/ C/ }+ d; c; \7 E
set-current-plot "Totals"! ?" e, E/ B, _
set-current-plot-pen "turtles"
% ^1 {! l' _+ m plot count turtles0 n+ o3 A5 N+ b5 V
set-current-plot-pen "grass"( w1 o% p, R1 Z6 ]% C9 X. x! k
plot count patches with [pcolor = green]) B2 G( B/ O5 H" o
end
2 `. b0 K; B [% f! S可是运行时提示no such plot: "Totals"& c) i$ ?* I4 J; o8 Y/ D& s* u r) s
error while observer running SET-CURRENT-PLOT
) u2 z- Y8 o, g8 j+ Z7 d called by procedure DO-PLOTS
7 G! }7 }! t+ W. ^# }6 M% [: ` called by procedure SETUP U F7 v! ]: U3 O( `7 n
called by 按钮 'setup'
! A; A: d# y( a9 C0 i' \求大神解答啊 |