我编的程序如下turtles-own [energy]
) I# ~9 W9 J7 b5 V8 A6 o) M, C! h+ lto setup$ y$ E+ c X. ~0 `
clear-all2 Q" Q7 i8 P0 S/ [7 k
setup-patches
; A; K8 d% g5 ] create-turtles 100
/ p( @- n" J: [ do-plots$ t- K8 c2 `& L+ [5 i
ask turtles [ setxy random-xcor random-ycor ]% |: Q8 W% |- n, x0 \3 b, b9 b" k
end
, v2 K# o& c, Z( S4 y% Z8 jto go6 Y" ~- B* \- E* G. T
move-turtles
' P) l* Q0 L( M) x, [ eat-grass, |& x) r* c5 F% p; u
reproduce0 \: F, _& f5 O# P- o% ^% |( b h1 i
check-death
& Z! q, ^ o$ H# @4 [* u+ E% v: i regrow-grass( U& R& d) y) \; ^7 E' H
do-plots9 z" F+ Z5 d' R4 E
end7 N5 H. h7 Y7 a5 B: G5 s* z; ^
to move-turtles
3 N8 y i; W" [: k ask turtles [
" S% b% n2 @. u1 l* ?% B% } right random 360
9 L9 L' ~! c/ \& J forward 1' H1 Q6 D& f- i$ Z& k" [
set energy energy - 1
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3 O1 I" s7 e$ L1 g! g& G ]7 kto setup-patches
- o+ N- l! M' W: } ask patches [ set pcolor green ]0 f }% a7 V4 @) M- a4 E/ n
end. D6 d5 g0 l- p0 D1 A4 ~6 i6 O! I4 k
to setup-turtles/ Q# d4 @# g1 V5 W
create-turtles 100; [4 u( x+ `! z5 |4 @, X. t8 ]
ask turtles [ setxy random-xcor random-ycor ]
: Y8 ^9 H9 O' Cend
6 [3 w# ^2 A7 h9 m' ~6 d0 ~to eat-grass
+ x8 R5 R5 Q1 }# p( B, _ ask turtles [
+ B! w* _- i% X) P% b if pcolor = green [
) G( \2 y9 \* ?: V/ |' P set pcolor black
N/ K$ o* t0 E/ \( j set energy (energy + 10)
, D }) f) {$ y2 W/ P: g ]
! `7 \# X2 k" B5 h/ Q. T- Z ifelse show-energy?
, W7 U5 K, o, d2 H; D3 b, f [ set label energy ]6 |/ K. _! j0 j7 P5 x8 N
[ set label "" ]
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- @! w, {9 l+ ]1 T4 N* y, c. q Cend
, G- _. X% [* s/ N1 d# M! Zto reproduce% _& _/ b+ x5 T1 v) f0 q
ask turtles [2 ^- r; K' q; q9 c0 L
if energy > 50 [; @1 z8 ]) B9 Y. h$ l
set energy energy - 50: \9 r! M* u* s! D2 `
hatch 1 [ set energy 50 ]( V6 I- E2 {0 M/ _
]
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+ U5 C( S, \& \& r& G% E8 a: X( yend
7 c3 T X; P3 H2 ^) C& vto check-death
. @' c9 s: O9 ^# a3 J/ g ask turtles [
3 A9 L1 z G$ S+ r) A if energy <= 0 [ die ] k: A: }% `: }- ?% V) w
]% W& Q- P' R3 u1 X' U2 J
end. f& V" z- o+ a1 F i/ M; k- V
to regrow-grass
K) `8 k$ _- I: W3 \6 _ ask patches [
% K; d2 R/ C, E k7 o4 K if random 100 < 3 [ set pcolor green ]
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2 R3 C2 ?/ C- y$ d5 K$ \end0 ~# V2 M. a: M( b0 s! j
to do-plots" Q; I+ t/ S3 i: w% R' D: i4 R/ |3 P
set-current-plot "Totals"
1 B; X0 g/ h) e3 y set-current-plot-pen "turtles"
+ o/ j) E2 U* {1 E plot count turtles/ l3 s4 b. c2 ^ Y; c
set-current-plot-pen "grass", z& y7 } z# r. G9 ^
plot count patches with [pcolor = green]
5 i0 D/ ]! ?; C4 [# _, Oend
$ G% I$ M. A- t; \& ^; l; `可是运行时提示no such plot: "Totals"/ o8 Y2 H Q$ x: n
error while observer running SET-CURRENT-PLOT
4 f2 K) P; A' v2 _: A, P/ F+ s( ~ called by procedure DO-PLOTS, B8 Z" A1 L' U9 F% ^( M
called by procedure SETUP
" D& b3 K; Z% o" V L called by 按钮 'setup'
3 x0 \0 v9 L; f; y: d0 q求大神解答啊 |