我编的程序如下turtles-own [energy]
' I9 i1 ^' y6 c9 Eto setup% S' D6 }4 j% ?; }* W; W+ g+ s
clear-all
; d9 g) ~5 |6 }; [; H1 F% ^- o- { setup-patches# Z! X$ B" ^% x1 S& _# F/ i& Y
create-turtles 100$ e: s D; M, b" W
do-plots
, K5 P3 w) f+ E- { ask turtles [ setxy random-xcor random-ycor ]# @+ i/ r- {% i
end
, v+ v; ? u5 Z( C7 Mto go
8 \ G* r9 u, q9 f move-turtles$ \$ c/ S9 @9 g8 D/ C6 n
eat-grass
2 S- h g' ^. u- h reproduce6 L) p: r9 }' \( o
check-death5 C2 X9 a$ n: F ?: Y4 M. u
regrow-grass* y% m1 N; B# h! e" X
do-plots
0 m7 G$ h& o) a& k$ m# lend
/ L4 p3 U- h l4 N2 F) r, k8 }to move-turtles
U! B; U' P) g8 v5 o, y8 q ask turtles [
8 A6 n; i% C: e0 }( X, |# N right random 3600 s: s5 W* o5 e$ f5 r! |* T
forward 1
2 B Z! w8 ^, {( E6 I3 }; e( R1 W set energy energy - 19 A8 _8 J; k& G6 i( s u. u
]
/ F M) f+ {3 Pend/ B. z: b( A" J6 k- d+ [5 O
to setup-patches/ \6 C% G. i4 X
ask patches [ set pcolor green ]
: }( M, c7 b4 O- xend) Q) o7 U1 a! n" A1 l, w
to setup-turtles3 [$ h/ s2 D( f; ]
create-turtles 100& G1 f& V: a$ O' w4 y4 p
ask turtles [ setxy random-xcor random-ycor ]
# ]# V, n! t% bend
! m- W+ k3 l: |to eat-grass; q9 l7 D5 d2 m0 P
ask turtles [4 M3 ^3 B$ q7 ~1 M3 K# ^
if pcolor = green [1 U7 S8 H% G% Q, N- j; H
set pcolor black
4 V4 l" k& E ?& L; u* G set energy (energy + 10)
! Y8 D* I) E+ Y; g7 K ]
( B' d0 X. R- t5 Y& ?; H! h3 t ifelse show-energy?
3 e) _1 l% ~- n7 R8 E' D [ set label energy ]" n' S9 w7 g4 c0 `) M' K0 N
[ set label "" ]: ~' ^4 i8 Z$ `1 ]4 O& ` R& |! y
]
& i# w# O/ X9 |+ B# z Dend9 X" W4 K6 y) k+ g" G! ?( \! M
to reproduce: P ]; C0 [/ M! n D
ask turtles [( S& C+ B2 F1 o |
if energy > 50 [
, Q2 a. g8 v7 V! ~5 E* _ set energy energy - 50+ }" l4 p: i: b6 A& D
hatch 1 [ set energy 50 ]
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]
+ j" J. Z' m% A Y* Z+ Z1 Cend& j( |$ f, P& n2 d5 q$ z
to check-death! R8 x1 t4 y; o- L9 a6 \' C- ^
ask turtles [
+ n* H5 w" a; l2 a" J if energy <= 0 [ die ]
2 J% F& I9 H7 M ]9 B6 r! @" J% E
end
* A- y. D4 M' [% hto regrow-grass2 y0 H' n' G7 a; Y! X9 K/ m9 L
ask patches [3 M; w- n* @3 g4 r# a& s+ f; H. S! s( E
if random 100 < 3 [ set pcolor green ]
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end
' q% \% b$ g% d1 Oto do-plots
; V, z' }0 k& E3 | set-current-plot "Totals"
/ [7 H* J3 T1 _+ ` v set-current-plot-pen "turtles"
3 Q9 G% b& G: U1 H8 Q# u$ o2 e plot count turtles3 d. c- _3 p! @
set-current-plot-pen "grass") D. @% @- R) n. u; ^3 g
plot count patches with [pcolor = green]" V& [. i; h0 T0 X3 |5 W
end
: K* ]$ i8 Z% @: l; Y可是运行时提示no such plot: "Totals"
2 m- A* c" x6 F" k; r7 {( o' Zerror while observer running SET-CURRENT-PLOT
0 }" {, ^/ S! C% X called by procedure DO-PLOTS
) z- [9 Y# L) t( {3 T called by procedure SETUP( _0 e4 o3 G9 d }/ b4 u+ ^+ z
called by 按钮 'setup', I" _; i$ [/ p$ ~% c& Z* c
求大神解答啊 |