我编的程序如下turtles-own [energy]8 U+ s3 Q7 M" w2 u0 t7 t
to setup. F& u! X" p, n5 V# ~% d
clear-all
' ~: K) W2 N3 y, W% m setup-patches
- n4 z% t H+ o6 Y create-turtles 100
# x1 W2 R( ?9 H/ c( g do-plots+ S0 K$ g z( M0 ?/ |
ask turtles [ setxy random-xcor random-ycor ]
) E8 {* N% p! _; j% Pend; T! e2 |7 G8 K; q/ W
to go# u* [8 Z, W$ ^4 p/ F
move-turtles0 Y5 T4 w5 N2 K" ~/ t' m; w' N
eat-grass
/ u5 r k6 X' E: T. ~0 @2 K reproduce
8 A' ]* f7 {9 J! I check-death' s( `9 o* F1 s6 ~- C8 s# x5 [
regrow-grass
, a. n$ r3 x4 n. t* m$ O+ j do-plots
* _8 ^1 Y( d! j7 N- cend
: A/ h( A2 a% F. k1 e) ^to move-turtles# r$ d. D' L1 [& S5 A
ask turtles [
) G8 L2 w8 @# R( l+ ^3 Q) t right random 360
* ]! u9 _) Y9 K6 i, e8 C forward 1
) K5 I8 ~6 q) v2 _3 |1 i set energy energy - 1
+ o) Q& w2 j8 X ]; P' d: {5 b- T8 E8 z8 J" ^' R
end6 W) b* M& O1 c$ d7 M* T
to setup-patches4 k9 F) e: V4 D* T% k4 r* j
ask patches [ set pcolor green ]
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to setup-turtles
! e# z- t; T6 U3 F0 i5 M3 O create-turtles 100& u+ g6 z& P' F3 w7 v# u$ P9 Q. K
ask turtles [ setxy random-xcor random-ycor ]
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to eat-grass
, \2 b" m. Q* c' \) T% D. X/ V ask turtles [
5 L, m( n+ ]$ Q5 Y- [ l2 [& @' ~ if pcolor = green [! Y1 y/ A, G( x0 m$ t( n- o. |7 \
set pcolor black
" ~% D% l8 K t, u1 G! h set energy (energy + 10)
+ _( d$ T6 m# M, y ]+ f: X& q' P$ u4 M
ifelse show-energy?( }# g- F* }& l( e2 o- L5 q! a2 A
[ set label energy ]
) K. O6 s7 ~8 i, |) F) @* ~. }0 l [ set label "" ]
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end" T) I- d+ j9 B, M6 E. C8 A
to reproduce
2 o6 C# b1 U: i& b* E# ~1 x ask turtles [% B, ] P; h; E" l1 s4 Q
if energy > 50 [9 x8 A4 r( |0 B4 ]2 _1 L, M- M; l
set energy energy - 50
/ G% w/ f, n7 x! ~/ n$ W hatch 1 [ set energy 50 ]
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end
0 L' g! S" ]+ G7 H+ ?- nto check-death
% Z; @4 Y7 `: K/ R# d, H7 s3 t6 i" z ask turtles [
; @0 Q# y6 ^7 x( y if energy <= 0 [ die ]
, n% F7 o5 v/ ^0 O ]
8 u4 l/ q. Q+ m q# P% f' Q0 fend9 D2 R- Z- m( u# f# E
to regrow-grass
- o" j; `7 I! L! o) t3 [ ask patches [
1 ^% m$ X* x+ o% v if random 100 < 3 [ set pcolor green ]
2 }" h' @; J! E6 _ h& e# I+ _ ]3 g" |) [ K4 q5 |! @2 B
end
: S- D" p9 b: y6 I; \4 c% Pto do-plots: j# a5 O! f, H3 K# b+ _+ h
set-current-plot "Totals"
8 M7 l* g, F/ b4 C+ F7 z# L set-current-plot-pen "turtles"9 H. F* l' L7 ~
plot count turtles) F8 ^7 Z( ^- ]- G" E
set-current-plot-pen "grass"
+ v+ e' _. ~$ H8 Q/ j plot count patches with [pcolor = green]
! k) z; A; s% k2 |6 Y0 f& E9 d$ }/ D: ?. Qend) H7 G1 g/ u+ m, m4 V# g
可是运行时提示no such plot: "Totals"! F) A A- J [: H$ l7 Q# i* Z
error while observer running SET-CURRENT-PLOT, q6 n/ i4 L4 A0 Q! N- c2 }
called by procedure DO-PLOTS
7 U. l8 J: F# N. E% \; c called by procedure SETUP
9 o# O+ d1 A' i6 n- U called by 按钮 'setup'
: R3 i, H; ^: ~( U! @+ y$ X. A/ u6 X求大神解答啊 |