我编的程序如下turtles-own [energy]
. N; Z+ ~7 M$ e; g. Ato setup2 }8 K$ z) g. m+ }8 r" {; X
clear-all# k1 Z" F* x) H( j
setup-patches
2 N' X# p# Z( V& ?" y0 c create-turtles 100* U' O7 O* t# n3 s
do-plots
% C1 a: r& q% B. J( y1 X ask turtles [ setxy random-xcor random-ycor ]! u5 T4 ^' v! `. t
end
. i8 G2 p* H& P2 k. V& y" ato go( \; s6 H( z+ x! y# W: N- y5 g' ~
move-turtles+ }& ^) _, S# [3 L( r$ k! ]
eat-grass6 _, ~: M- K O: Q- Y
reproduce- b Q; c3 l; C6 Q! r# G
check-death
) Z, p6 @! e* I1 F regrow-grass
) @8 N6 w# D5 x4 |: w& p do-plots; j# K% T0 a) Q! x( ~, ~: x
end
, t3 b$ O" l+ j( hto move-turtles
" J5 q8 T5 \5 Z2 g* ^; o ask turtles [
+ L1 s4 t! ?' B right random 360
: z- M% S) q+ O/ _ forward 1% e4 R# D1 U# Z/ \
set energy energy - 1
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! }' s3 F( I* N% }- Y3 L% M" Q4 T! E+ bend
0 V0 ? |- N+ ?9 ]1 {# l( Yto setup-patches
: w' N9 w8 R' Z6 E0 R; g2 J6 v ask patches [ set pcolor green ]
% q, h1 `- `& p+ [! {end5 |- @. C7 _7 _3 W1 n
to setup-turtles8 W+ ?: S h. [0 @% ]2 G
create-turtles 100! s( u1 P0 b6 t6 ]* U; T% P
ask turtles [ setxy random-xcor random-ycor ]
% v, [' ]; L% a( kend
8 `5 T1 ?8 o3 p+ u4 V+ |/ E/ ]to eat-grass( @3 L T% L- X- `, F* n7 V
ask turtles [
/ I1 Y$ X% e5 r if pcolor = green [
9 m5 v+ V1 q+ Y' |. {9 F set pcolor black
6 _8 ^7 ~& N9 R1 V/ h) Y) ` set energy (energy + 10)
0 @5 A1 l; y8 I' q7 I5 h ]7 Y6 ?" [. B+ d* `
ifelse show-energy?
8 H8 Y7 k# I$ T3 r1 ?) ~ [ set label energy ]
* S6 a" D: h! D& `, `, t" a [ set label "" ]
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end. [( t, x( n$ [% f
to reproduce' a; ]- l+ Q9 I, }! k7 e0 s
ask turtles [6 y# O/ t* w8 D; H4 s4 M' g
if energy > 50 [
, ^) V) `; O+ U6 z set energy energy - 50
, f+ n" E, w* j4 X hatch 1 [ set energy 50 ]* c# ?: |+ G: ?
]% p0 a, B# A V( C# T
]
" U5 x; u5 {. J7 ^8 M( fend1 t$ f% i+ M1 u! F' j0 o
to check-death
% J0 W# s* i2 ]1 z0 }! U% [% S5 g ask turtles [5 I% i# d+ l* q( u, m: J& Z
if energy <= 0 [ die ]
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end
" M9 ^ _6 ?6 `! vto regrow-grass
5 |5 Z+ h ^- u: t( W" S ask patches [. y/ G9 b% R' C
if random 100 < 3 [ set pcolor green ]( }4 J, {6 k; w1 p! J% s
]
7 i1 d& q# T1 F1 N, H, _3 d% eend
( G, L4 ]6 r9 T3 E Qto do-plots0 O W# H) B# q6 k _4 k% L4 b
set-current-plot "Totals"5 t; M' a, v3 K/ z/ s1 J. n, c4 @+ d
set-current-plot-pen "turtles", Q& s+ {- z, j6 z
plot count turtles7 V9 D: J+ [/ q
set-current-plot-pen "grass"
: f0 _# Q1 _; w* q6 g+ X/ U plot count patches with [pcolor = green] K! Q3 Y) q3 B: [+ p
end- z& w: U, I7 s3 O/ w
可是运行时提示no such plot: "Totals"
& v9 k+ A" w, ~9 i7 C; _% ierror while observer running SET-CURRENT-PLOT
h. P4 k; P' \9 g: { called by procedure DO-PLOTS0 R5 b" ^1 B! z
called by procedure SETUP, H# m7 \3 W( z; u4 L- l' p
called by 按钮 'setup'
- _1 p7 t: f3 y求大神解答啊 |