我编的程序如下turtles-own [energy], Q, D# b" T/ U& O. X
to setup+ ]& n8 t4 c, P
clear-all! r1 K: f. x: X( T/ ^5 A" {
setup-patches `# L* a. y) r, O1 ?
create-turtles 100
: @+ S1 \& v; p. `% Y do-plots
- y& u0 q4 v5 O ask turtles [ setxy random-xcor random-ycor ]; Q% q; X- E; X5 G
end6 W& D9 A1 J4 b: |8 Z
to go! _# R. m/ c# s# ~
move-turtles: n3 l" R" k! l1 Q
eat-grass% S( Z( A# v; H1 H
reproduce
" l2 n g2 p! { X8 I check-death+ u; f" v, y0 X- Q
regrow-grass) X( P8 \, i/ y1 I( u3 E6 }8 t
do-plots
* {) _: E% T# |end
7 I5 T* J1 E( \+ r6 Eto move-turtles2 }( `9 K8 \3 m/ O _' s
ask turtles [# h: f! M( n9 `2 c3 }
right random 360# a& R$ C$ a! L" d
forward 17 V0 [! o# ?% Z4 J6 x- ~2 B; j
set energy energy - 14 z, `- G& _+ f) k, [% M8 j: b
]3 I! y9 K! d1 ?/ y" k* X
end. V& |5 U% ^$ I! n% ]; W, j( b! w
to setup-patches
4 |4 ]5 f4 |2 r( c ask patches [ set pcolor green ]6 s+ w; h8 z0 f! p; F8 c
end* ]. d# V0 Y( E1 a) t
to setup-turtles j* J5 q5 }/ w" b6 {: [! Q. l9 I$ k
create-turtles 100
$ B% E& \: ~6 o6 a& e% @" | ask turtles [ setxy random-xcor random-ycor ], r; ?1 S/ G0 }- v! d$ J- q; T
end
# p8 f' n( E) ?1 S' t0 Uto eat-grass
8 [. T- n9 ?# [ ask turtles [. \5 I+ R- z& R5 P1 c/ g7 R' {
if pcolor = green [& x. F8 v1 l. ?3 P
set pcolor black
# P& I% q+ L+ q8 g h6 N set energy (energy + 10)
/ _# G* a4 F- }+ X% L) W3 \ ]3 y. f) N( U y
ifelse show-energy?! G& U# ^. j7 _& R0 N' r8 G& r
[ set label energy ]
1 ^+ W9 X4 p r+ _ [ set label "" ]4 b% v* }: Z8 y' p) O
]
4 z' H. ?- r% Y9 U$ W; M' oend1 \7 q2 o0 \5 m. {. V8 N" w
to reproduce
7 O+ M% v. M, l9 x4 ^8 m9 b E/ Q ask turtles [5 n% C/ B7 a# ^( r2 N# u; L
if energy > 50 [
3 c9 d: j7 m1 q( l9 z& k9 c set energy energy - 50
8 I- ]9 ?( g( A hatch 1 [ set energy 50 ]
C7 `5 e, p3 h l ]3 R, w+ t$ a. }; o. P
]1 A, `7 ]3 v! L# ~( L1 s* T
end# l$ ^+ ]; i2 s2 ?5 |6 E
to check-death# {" i8 L7 [' l
ask turtles [4 X9 J K" t% m- c3 K6 s) |
if energy <= 0 [ die ]
, I- \" j2 H( Z ` ]# d8 h8 j$ F' S" a
end
. ?% |* ~6 \! }/ F+ H' D; ~to regrow-grass) }. ?% k' O' z) M0 P* y, {
ask patches [
$ G' @" E- n3 U. \7 m% x if random 100 < 3 [ set pcolor green ]
7 l! u8 K4 ]; t! h, X; B ]* L4 k* O! k# I1 M
end
; E/ L/ c% z% }) Vto do-plots4 _" p1 K- Q! ^( L
set-current-plot "Totals"
+ s |& A7 r6 \/ r4 a$ Y set-current-plot-pen "turtles"
6 d- d/ ]- z% e* b8 { plot count turtles
+ v: U" G" y( V5 o set-current-plot-pen "grass"7 ?$ q5 l0 v7 G7 i( p
plot count patches with [pcolor = green]8 I y% T9 x' k' S
end
: |8 R2 | w% T: L可是运行时提示no such plot: "Totals". F6 ~" `/ F& L9 V
error while observer running SET-CURRENT-PLOT
7 {0 H' g% h( `! [% y) e1 b called by procedure DO-PLOTS$ O) `0 s( b. {' R D+ U
called by procedure SETUP
/ c. c1 j/ h- V$ V) l# t* L called by 按钮 'setup'. g* m& N) U4 v/ h3 }6 v' y3 r
求大神解答啊 |