我编的程序如下turtles-own [energy]
8 N7 P, E' n8 Dto setup
1 t8 u$ H! d9 O clear-all0 I$ D3 M+ u! C4 R9 N
setup-patches
$ ?; E" |' v+ M) @ create-turtles 100' S/ d- P% b# d, O3 F* \7 W [
do-plots
7 m# b, F. l( v) L ask turtles [ setxy random-xcor random-ycor ]
# d, N! A6 d8 o+ ^ U! |9 Gend
% ?) K' |# `+ o# T0 I9 Pto go
1 k" b% D, u1 G" B! D1 }% J move-turtles
, m* y" I" X7 L eat-grass
* @9 I' i( _1 L6 \6 k/ M. y" q' u reproduce5 v( \( O7 n- _1 m
check-death
/ Q0 P \, G I( N: S/ n regrow-grass
4 k) c( o" ^# \9 d do-plots
7 _; x! y" M3 z% Z! g4 z. t2 Iend
; m a( l) ?6 t$ a6 B# m. l# {* yto move-turtles
( k. d: t! q0 @ F2 e2 W ask turtles [% {4 y6 D4 X4 C# A0 L5 J
right random 360$ K" F. j s1 L2 s: a* n, m
forward 1
, o9 w6 K$ C8 ~: E. _) y' E set energy energy - 1
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end
- y# S- }5 i- {- Y9 P& Bto setup-patches
" ~$ m0 X( \3 Y: @ ask patches [ set pcolor green ]
2 C. h5 U. `& m: Y) send
$ J/ N! I L, ^& Xto setup-turtles
. ~% C0 c4 j* v) j, J create-turtles 100
! k1 a* [2 q! {& m ask turtles [ setxy random-xcor random-ycor ]
2 y1 H3 V$ l4 Fend
( Z2 i) a' a# a& Ito eat-grass
( E: d: ]0 x: y# W( @$ l$ A% @ ask turtles [
* |2 B$ v/ Y1 D if pcolor = green [+ C. K b' }( h# n* q- E
set pcolor black
" d! g7 ?# f: {9 g set energy (energy + 10); j, r/ n4 n3 H' j9 \) l O
]
+ ^/ k: ^1 |% g% r4 z4 ` ifelse show-energy?
% H7 a: l1 @+ T/ ? [ set label energy ]( x# }: p* x; c6 }/ _
[ set label "" ]
- s7 X5 ?* G# ?7 }; @7 \+ ^, z ]7 Q5 m9 R i* }
end
4 O5 P1 a: X3 i3 e6 A) `. oto reproduce* x2 ~" D0 U# o5 `" q
ask turtles [
9 k( q0 e! U: U3 q; k if energy > 50 [. ], G7 ?" S" b. g3 r
set energy energy - 50
$ H0 m$ i* V+ b hatch 1 [ set energy 50 ]
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]
3 V; v/ V3 l7 uend7 ]) }) F% F! u/ j& Q1 I! N
to check-death
9 e# r! j }8 D! T( h ask turtles [! k O) Q) g/ g( e5 ?; a
if energy <= 0 [ die ]
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end
+ e; H/ b! H0 H: E" Bto regrow-grass
/ B$ D3 k! W* x* x ask patches [
, V5 d' O& |6 b9 d if random 100 < 3 [ set pcolor green ]
- E, s7 v& w6 T ]
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to do-plots
2 }* H; z: a* h; l3 O! F5 r set-current-plot "Totals"
* K+ ]( v( S$ t! o- c set-current-plot-pen "turtles"
( u' z- a3 H6 q1 B7 c9 l# i) [, F) _" h plot count turtles% C( \- H/ x/ j" r
set-current-plot-pen "grass"
6 h, J% t* I) Z6 q' G$ j plot count patches with [pcolor = green]. V G+ D0 Q# ~1 l/ V* n. `
end
$ [, t) s' k8 T+ | m0 Y) c可是运行时提示no such plot: "Totals"
2 \( W# {8 K0 ^! oerror while observer running SET-CURRENT-PLOT
+ `8 V5 G& a1 N/ B called by procedure DO-PLOTS1 Z4 n3 p& S% t& s* E* E
called by procedure SETUP9 V. A6 d8 g( q" I
called by 按钮 'setup'
$ A6 K' i) n+ Y0 h! d求大神解答啊 |