我编的程序如下turtles-own [energy]
5 |8 C- e2 h- h# M. [! k$ t9 ito setup/ z/ j- ]! `: ~
clear-all+ T- p& ^1 d1 ~9 c! P: ?+ E5 H1 F
setup-patches6 P {7 K1 e0 q( p H/ `6 I3 n
create-turtles 100
9 w, G9 r: |. @, p do-plots* S: t+ g4 T& L, p* }$ y Q
ask turtles [ setxy random-xcor random-ycor ]# q k9 F* j( x/ R* ^' y. _5 E
end
$ m c3 j) L5 Q+ T" I( Qto go
8 R2 _# e0 H: C! ^( e move-turtles
) v8 ~# H9 ]$ q G eat-grass
9 k% W4 _1 w8 d6 l, I reproduce! Y5 B9 H9 ~+ N) s7 f/ W
check-death
p- }( O6 q1 m ^ regrow-grass
) L* s3 P8 n) ^4 C5 T/ z' D. ^ do-plots* b: Q8 Z8 u( p: @
end
7 ]. S# U7 u. e2 p* [6 h8 Wto move-turtles
. x9 ?& X' J2 |6 p' E3 { ask turtles [& F" v9 r1 X1 R- ~2 i+ B
right random 360
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set energy energy - 1' {6 B* ]4 f- d& k$ N, @
]
- W1 `/ }8 Q4 e$ {end
! f2 F# `- t% ]* T5 [. @to setup-patches8 y# T% `7 p% H% @' l9 W2 H
ask patches [ set pcolor green ] v' a p0 Q, ]; K
end. b4 ~1 p' o D0 }
to setup-turtles: _) T5 Z/ V/ ^3 r. M
create-turtles 100) }4 u, y9 N1 ]; F/ K5 S
ask turtles [ setxy random-xcor random-ycor ]
- L& ~ f# F8 H. F/ y+ B2 P& t. p. @( Xend
0 q7 v$ d# g, r# y' D3 Oto eat-grass
* K( u) ~% o" ] H) P9 v ask turtles [( K$ {; B3 b! C
if pcolor = green [$ U6 R" d8 ^4 e6 {
set pcolor black. W w. X/ P3 [- J* W" `& G8 m' J
set energy (energy + 10)
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ifelse show-energy?3 A% b4 l: L* t/ L) b3 |
[ set label energy ]) X4 T/ j/ D; B0 H7 y" G$ L) u3 Y7 t6 J
[ set label "" ]
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end" s( {5 K ?& P! M# |+ \
to reproduce" {+ `7 R7 B! U; J
ask turtles [4 M& k7 p+ l' z
if energy > 50 [
9 L7 L6 j+ P6 F3 O) { set energy energy - 50/ S& a; G% f1 ~7 C
hatch 1 [ set energy 50 ]
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]% R8 `) P8 Y2 v' f
end
* l+ b( {# k) H% ~: a$ g5 Hto check-death: F( s8 { |! U' b5 g) Z) R
ask turtles [' e$ E; a/ R( x6 p! K. o" k( }
if energy <= 0 [ die ]
: _5 I+ ^ r( _$ [, V0 P; r) Q ]) Y n% O4 u9 D- H2 E
end3 r- ]4 I: D0 y4 [. [3 y8 e5 w
to regrow-grass
1 s% G# j% C$ E$ b F: D$ ?' b ask patches [
/ h* f" V: Y/ y if random 100 < 3 [ set pcolor green ]/ m8 Q8 X+ o# {' g7 M7 G
]
' @9 z% B; K# z* ^ n. Zend
4 v( \" H+ u6 K0 }3 X! i, Y5 |; T$ m- uto do-plots
$ U: P C9 @1 \* @* c set-current-plot "Totals" q4 p( C2 d g- F$ H
set-current-plot-pen "turtles"
1 r& P, g7 G3 y/ t) o plot count turtles# p2 P) g9 X8 P
set-current-plot-pen "grass"* K- O; I: _7 ]( y* N
plot count patches with [pcolor = green]
3 @. w+ F! S' kend; w& I( z, e3 R( d, ?- x
可是运行时提示no such plot: "Totals"3 R" a7 S3 I0 U F
error while observer running SET-CURRENT-PLOT
% B) N* q4 _& a; [; c called by procedure DO-PLOTS
+ |# x* @, |6 ?( k: u. \ called by procedure SETUP
9 w; I) b( I& Z, u called by 按钮 'setup'
% u c1 _" P% u# w# f4 a求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
