我编的程序如下turtles-own [energy]
' J8 z5 o- f% x6 w, x# M2 H- Xto setup
3 Q7 R8 `. M% \8 T) A0 c7 d& ?$ r/ [: N clear-all) h% y* x. u+ }& e0 Q7 ^8 t
setup-patches
- A7 o' N" d. i6 F, T0 Q/ U: H( e create-turtles 100' |) [4 ~! t: ?+ W+ W: _
do-plots
9 d5 r' o. ?9 M [9 o ask turtles [ setxy random-xcor random-ycor ]
) x# Z8 n A, i0 h# r, Eend
$ L0 F' U1 |/ Q% Q/ [to go
' N* U; M- H7 z9 c2 v8 Y move-turtles
, b7 _. p6 I z1 j X; P7 W6 u eat-grass
$ |8 ]0 J% `# {. T/ ^2 H7 Z reproduce
% }0 P# d4 |; Y6 v% u6 S; B9 h check-death
# b) d9 g D1 {% O2 M0 g regrow-grass
2 z- I5 O' S$ `3 ~* ]( C: g0 E do-plots
5 o) g' i* r6 ]7 s4 Kend. X+ d" m. Q8 V! b+ d# ]6 s
to move-turtles
+ K" D, F' T5 o3 Y% C9 e ask turtles [( M* O: }5 H- `$ K2 E+ T
right random 360' t+ F! q; [) q; @0 i9 V, f
forward 13 R' B. y8 L7 W1 W% U1 z
set energy energy - 1
) V" V5 X% [- t( k: k! E ]2 ~8 f0 `/ {& @: f: Z
end; ]4 P/ e. L$ J+ T, X% N
to setup-patches
- I. ~! }, {7 a/ M( {+ w ask patches [ set pcolor green ]9 L2 n% R" V+ C0 X0 N# F
end
& }: X# l# `1 M) |9 @$ o( g/ N3 Dto setup-turtles I1 A6 U# K1 i+ g' F& s
create-turtles 100
; m9 g& ~* Z$ y9 q n ask turtles [ setxy random-xcor random-ycor ]
+ ~/ t. s. m, {- l- E, Mend
1 Q8 f5 S% Z) L4 o4 M6 bto eat-grass5 O% H0 i# G ]9 M$ Q( ]2 R
ask turtles [7 ~) T ^, k& B7 [ f
if pcolor = green [5 l5 e5 Z( `- E) Q3 s
set pcolor black
: W5 Z6 X( b% W8 |3 s; g# ] set energy (energy + 10)0 e) ?1 _+ ^( T( O3 K
]
& s e" h, c! A ifelse show-energy?
' q1 O6 c' _: _7 q# C& V! Y) C [ set label energy ]6 S, L* ]. H b
[ set label "" ]
& B/ Y8 U( U/ F; r, }4 g ]
& h0 X" K( O+ b/ iend
$ U7 i* G, i1 x6 C) U5 H" Bto reproduce7 O1 B$ j9 R) R& K& R
ask turtles [
8 q. V2 T6 k9 D% U' z0 U if energy > 50 [
* e' M6 b. B- R/ ^, f8 u A. Y) q- J' K set energy energy - 50
0 w' T5 L) L2 E9 x" u hatch 1 [ set energy 50 ]
- X7 O6 z8 t# w- H5 t/ C ]( ~" t5 i @# l% X) S
]& w0 |; v/ N& Y3 ]% }" t. R6 a8 I
end
; J" S. Z4 L$ Lto check-death
, ^* o4 e+ i8 K& \ ask turtles [
% P: T2 J4 I$ L8 ?) N2 T if energy <= 0 [ die ]1 N: i. B2 L" W2 D8 ~
]# b" |. F3 Y0 y
end
( J. J; P3 U7 D* g3 @to regrow-grass) A! U! J* v6 n4 R: t
ask patches [# Z/ M2 o% y" T8 s5 H% y3 D
if random 100 < 3 [ set pcolor green ]4 x: ?9 L7 X) }5 s. M8 `
]; V1 _# U, g- r/ W$ \, P. G
end3 b2 u% |4 K7 w" T- c* x
to do-plots, a2 w) L# L; w9 w" }
set-current-plot "Totals"
0 _5 t8 ^7 l4 C8 A" q3 S( h set-current-plot-pen "turtles"% ^, D; X: u# [! c; `
plot count turtles
2 ?1 M8 B& S+ ^$ q% ]. i8 V set-current-plot-pen "grass"
. U1 ?, ]' {' c, F% q2 w2 c% M3 w plot count patches with [pcolor = green]
0 ^1 ^# l" e2 ]. w9 Y o( t* ]% qend
; H0 _1 i1 U O* I8 h, G可是运行时提示no such plot: "Totals": |, }# M2 B P/ w1 q1 A
error while observer running SET-CURRENT-PLOT' S# J6 T9 X! Q3 {( i" _5 R
called by procedure DO-PLOTS
: W) w) s, @5 j2 ?+ D7 {! m0 M4 u called by procedure SETUP
# o2 i- C! ?0 u: A called by 按钮 'setup'. X9 D, b0 k% A: X# h
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
