我编的程序如下turtles-own [energy]
! y% K( m- C; C8 W# Qto setup/ p( D" f: O/ I3 w. ]
clear-all
$ y7 T, |. t. \/ y, ^ setup-patches2 r7 d/ k* b) M9 u# B5 D
create-turtles 100
& c# Y( k) c) |' _ do-plots. S+ H1 t7 a) @/ Q p1 T4 u
ask turtles [ setxy random-xcor random-ycor ]! ^; L* ?, b0 |! S: {. J: D/ A
end
' l5 u. r0 E6 j& \+ {to go
2 ?2 j+ v! x2 g! ? move-turtles& M% k& ^+ M( h6 x
eat-grass
& \8 S- i+ T" n6 u reproduce
]5 c& {/ h2 y/ P$ Q1 N" W# Q check-death
n0 i U0 }4 \0 x6 ?1 M regrow-grass
6 C5 @: z$ F! f7 s2 L do-plots2 z2 O4 T( g# |3 w
end
( l6 C7 ~. D, Z. u3 H3 u* F0 P5 Mto move-turtles) C% j+ e( [8 Z" V* U
ask turtles [
9 d5 J" S! ?% s* ^/ N& i right random 360
. H$ F2 v& ~) y3 { forward 1/ m4 {, y+ d6 A) r4 ` ~0 W
set energy energy - 1
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3 t" O3 h2 t5 n D0 kend
* o. j f5 w5 ~0 |" ito setup-patches
6 q* y. {$ G8 G8 _ ask patches [ set pcolor green ]* F5 H: N7 @0 u2 L& @
end T% t, d' b; V; U0 ^' P
to setup-turtles
4 t& X' r2 `: m& J; x create-turtles 100) o$ m* U9 r) ~! E( Z2 z0 Y" @
ask turtles [ setxy random-xcor random-ycor ]
4 f- V: ?9 n% y$ u: z! F _% gend
# N! y5 a& x# Q- P" Xto eat-grass y7 Q/ x. P9 v8 S! F+ `" P4 U
ask turtles [
# m% h1 r5 `4 S- }" g3 ]6 f1 J if pcolor = green [
& A/ v2 a( w" y; n. g; D set pcolor black- ?1 f2 x$ h6 _' K, r" x- g7 z- I( `: |
set energy (energy + 10)
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ifelse show-energy?5 r5 F6 X8 d& J0 B+ b6 k
[ set label energy ]! ?# \8 F Z$ `" m# O8 f
[ set label "" ]
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end
, u% c+ p+ f( e3 q! V) K5 Bto reproduce& z! v8 d' y; M2 a
ask turtles [
% N! @( B; h5 a, P; [6 e- K' a( T if energy > 50 [
0 ?; g0 S& {' k set energy energy - 50, N1 D- [, g& l
hatch 1 [ set energy 50 ]; A1 L0 X4 q' \: c+ g
] ^+ A$ E4 [# k
] K. F: S5 m) V; T; k
end7 g. R4 I3 {5 A2 B' y
to check-death; Z% z; s4 ], n8 F' e, F- x$ ]
ask turtles [3 P9 {9 u0 U/ Z/ V$ U" g1 c! B
if energy <= 0 [ die ]
+ b4 x7 t5 y/ n* |) ]6 @ ]; T; D W( K+ ^1 }7 L
end! e6 { Y2 I! H$ l H2 [+ F
to regrow-grass! e4 C7 H: `1 d
ask patches [0 @' E+ y) [$ {& E
if random 100 < 3 [ set pcolor green ]4 a+ `3 S4 c) Q! u1 `- S8 {
]
1 j+ p' U# Y' |( q. zend
! x( Y( H0 v2 P5 e f6 W1 qto do-plots$ `+ s: s# k$ }. D) P6 K6 B6 U
set-current-plot "Totals"1 d: X) h+ L- K
set-current-plot-pen "turtles"
" n( D2 F# D5 |3 A+ ~ plot count turtles( Z+ w; t8 p# w% z: O
set-current-plot-pen "grass"0 ]3 u2 s4 I* x3 b3 ~
plot count patches with [pcolor = green]; g4 E- K5 d, G. l, r* W( _: B
end% l6 m' n9 F" w: {( [* W
可是运行时提示no such plot: "Totals"
3 [% ^) e# H: rerror while observer running SET-CURRENT-PLOT- H: ~2 f, X6 t0 R4 T8 u, W
called by procedure DO-PLOTS
( }7 X; F+ x* E called by procedure SETUP, g& s1 v% C2 B9 E/ V$ c
called by 按钮 'setup'% L2 w9 }* H6 z9 H
求大神解答啊 |