我编的程序如下turtles-own [energy]4 B2 A9 {. I1 B* n
to setup
|, b, ?2 c- \ clear-all4 ^1 V+ r! y) l% X3 X1 x
setup-patches
" a- F, A0 n1 U9 z1 S" R create-turtles 100: e) I9 T* b5 }& M1 ~
do-plots0 e. a. Y/ J, z, U' \- X
ask turtles [ setxy random-xcor random-ycor ]
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to go/ H; ?: e$ o) L2 c3 E
move-turtles
$ ~4 h. o' x! W, h$ I: ] eat-grass
& R0 d5 I5 w7 A/ i7 N. ?. { reproduce
; n z3 E" m. }+ x _. a" g check-death
6 z- h$ S3 k. @: F4 \. h1 p regrow-grass8 M4 g, @4 ? }1 [0 u
do-plots( j+ w8 {/ H; `, v ]' G& f
end' E2 ^+ E7 w3 k) p. d* b
to move-turtles) i! j6 P" }6 @6 @2 B& C/ w
ask turtles [
/ @# o& l9 E5 s$ z% c/ |; E0 p: R right random 360 D" D, [3 M6 m3 c$ N/ I9 Q1 z
forward 1
2 R, d% J" P: _- K9 X set energy energy - 1. l* b9 R* g3 b0 y6 W! U! C5 Z
]. i- N+ C U; L( D! E
end( R$ @* E7 k I. z/ l
to setup-patches
2 c$ j! W; Y* ^, H# q ask patches [ set pcolor green ]
' ^3 d2 C9 |: u9 P6 L# C' Gend8 m; A3 K' R Y- I
to setup-turtles
3 m2 s* w/ _ L+ _) V) i; R. G- X create-turtles 100% E, x' W' I. g% r
ask turtles [ setxy random-xcor random-ycor ]
9 r2 z4 ~" G/ mend
+ {/ x% s& M; O& Y0 |7 E9 l7 L8 H: Hto eat-grass/ \ Z; I% X6 n6 |
ask turtles [
9 R$ B: T5 B' z# E! A3 N! ` if pcolor = green [9 H( ~3 I) y& D8 k
set pcolor black
* d4 \1 h2 s# I# G1 i4 S set energy (energy + 10)
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ifelse show-energy?" M( _: r4 S! x
[ set label energy ]
4 ^- W9 i$ Z1 h3 s" O. M1 A [ set label "" ]
3 ^1 l* h l& p( j0 d2 O: P0 r ]
% T3 ^( m# `8 Q8 s( t$ Send
6 \, p* D" [6 q$ Uto reproduce* O9 |* ~! a% l6 c) c) H0 Y b
ask turtles [5 x: W7 D7 x0 Y4 v' h
if energy > 50 [
b0 ]! [; M& A# V+ i' n set energy energy - 50" y) W5 y+ D) e& O# M# z# y
hatch 1 [ set energy 50 ]- I& K/ {! F1 _% N( u- |
]) } x2 F& M6 D! a) d; Y k# E" g
]
% e8 |1 Q% O7 Wend3 H0 o! _( b3 ?" Q3 f/ a% {
to check-death* \- b6 L, l3 L& C7 C
ask turtles [
6 E7 e+ y7 m% J5 d. p' a- ?( I* ^' k if energy <= 0 [ die ]
7 S) D3 b x' U7 {# ]; S ]
% o0 o6 M- n" C9 [end# Z ^) p n; E, G! d; b- b1 K
to regrow-grass% I2 a1 `( |: V8 g' F6 I
ask patches [
) B, {+ y# Z+ Y# X if random 100 < 3 [ set pcolor green ]
7 O" i/ D& @* a" T8 ^) A& ` ]: [' c j4 q% b2 E
end
8 R+ p' X$ e) e) Lto do-plots
9 L7 C: E% m; |1 C& S1 Q+ N, _( s4 C set-current-plot "Totals"; k2 ?$ a" p7 Y6 c; `, l5 f
set-current-plot-pen "turtles"
( C/ m4 n s8 Q( ~' Z plot count turtles
3 K% \" W4 U" s$ U9 q8 N* ~. L# Y set-current-plot-pen "grass"( A' g, W) Q' A$ M. ?$ [
plot count patches with [pcolor = green]
& r+ Q* _2 R, Q; N Bend) w9 F1 Z7 X3 _" H* ^+ F
可是运行时提示no such plot: "Totals"1 V9 D6 U% \( E) \( Y1 u
error while observer running SET-CURRENT-PLOT7 p+ i- b. C# ^# u1 h5 t
called by procedure DO-PLOTS$ L, q$ Z3 j. Q+ y% n: L
called by procedure SETUP
; ]! p8 Q1 ]& [* D+ }6 B& j+ c3 H called by 按钮 'setup'& ?+ l) m' b3 T; u2 Y) ~
求大神解答啊 |