我编的程序如下turtles-own [energy]& Y% T5 f, ?+ n% e! p& o
to setup
3 N2 G' D8 |) p" J. Z) S5 _" T clear-all
& E, `4 [6 k" K1 m setup-patches+ ?1 z4 b: J7 b( M+ v
create-turtles 1000 X3 C6 e4 U( P( l4 c) _
do-plots
! p- W9 O; a+ r* R( D3 J2 Y& m ask turtles [ setxy random-xcor random-ycor ]4 n3 J) }' X0 x; F7 P: N) Y# [$ L
end
7 a- T) y5 w5 f3 D5 Oto go
! r7 D4 o9 q3 u0 X; y& R; t" N move-turtles# i3 r( P8 ]- K5 U/ f) X1 @
eat-grass
" ?; `, G. T9 w J8 z5 y( Z reproduce) L5 h* }+ K' X5 \ p
check-death) q. E& s/ N- t% n t- M
regrow-grass
, L" i. m4 r8 T( M) k z' i( Q; f. |0 D do-plots1 l! j; T) g! j' O6 }- D
end2 x! `! R7 ]% t5 t- `/ U1 Q/ P- _9 q c
to move-turtles& |3 ^& i+ y: b. s
ask turtles [- y) J" C7 p4 v- P
right random 360 T. y0 \! p( l6 l5 H: I0 |' ]" [
forward 1
" ^6 K1 @ M- D& g! o7 r; N6 W set energy energy - 1* R. n+ k1 Z: _$ u
]
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to setup-patches/ X/ K2 N* f1 v" w
ask patches [ set pcolor green ]6 A( {( D5 n; f# h% f& N" y$ ~
end
" _# h: T6 t$ ]& r( Zto setup-turtles$ ~: t. ^- O/ {- A: v, e
create-turtles 100
; [+ `7 i! z$ _ H* B ask turtles [ setxy random-xcor random-ycor ]- i N4 `. q2 b3 z, ^
end' L9 |7 u4 S2 k. X2 I
to eat-grass
/ d- W! m; R" m+ O3 Y# H ask turtles [
5 p: Q! K V# U! d. F0 j+ o1 Q/ ] if pcolor = green [$ L$ T' ~+ a1 h! o. o" ~
set pcolor black
) q. C b4 `3 r) k' G set energy (energy + 10)
' X& m% D5 Q1 H, L# @! X+ W ]
* s6 x! O) @! v% P8 n: M+ t5 v( m ifelse show-energy?: V5 E4 V3 `0 l" C7 a2 o, E6 V
[ set label energy ]% x: |, n e5 W; [% p. @
[ set label "" ]( ?+ c2 A( y0 |+ Z. o) `; x- r' y. u
]1 x. X, j3 E4 l$ x
end# p& D4 K. A( x) {; m5 w9 f
to reproduce8 l9 r6 r! I7 |, N$ M3 g% F
ask turtles [
: E% N3 ^7 c8 M& B" o if energy > 50 [" u( `/ O; c9 Y9 b" p$ {3 f( [' q, t
set energy energy - 50
( A- S, K+ G& ~2 x$ X hatch 1 [ set energy 50 ]
/ C. P! k. U$ t7 G( ? ]
+ X; p1 ~$ t8 k6 k$ u3 p$ x ]1 k% q$ m8 ^2 z0 Z7 x6 D4 y
end
4 V/ S7 n* @4 K: _& f. `* e( fto check-death
! O; m! G; {% S6 S7 m ask turtles [
6 Y; B. @: k: @; \2 X6 w$ A' _ if energy <= 0 [ die ]6 O( o* T# g* x5 Y
]
" @# I5 c/ x0 A' V' F/ b2 Qend4 m# L$ i4 K" e% ]
to regrow-grass. k: H; A" b) a% k0 C
ask patches [7 E8 P: ]9 ^/ q# d6 S0 ?$ U
if random 100 < 3 [ set pcolor green ]8 J, Y7 L' d3 s; f \$ }( ^2 P
]
" g9 e/ B3 L0 O: U: wend( i3 `7 U* ~+ c0 V) K- H
to do-plots
0 @7 c, o `( J& T+ {- M1 k set-current-plot "Totals"" ^: D8 y& R. y
set-current-plot-pen "turtles"
3 ~7 m$ i! I. V U plot count turtles
/ t5 E9 S% {, q. S5 C set-current-plot-pen "grass"
% w8 ^% b& i0 I plot count patches with [pcolor = green]
# I# _; l7 K5 y! e! I G+ Send
, C3 [# `' o& q$ Q* K$ ^9 u% Q可是运行时提示no such plot: "Totals"
# G: c W- n/ K" W/ yerror while observer running SET-CURRENT-PLOT/ t* M$ g5 ` F, e6 f
called by procedure DO-PLOTS
' K0 c# G$ Y" t+ d2 D ^9 u3 \+ Q called by procedure SETUP9 x& T! ?) w/ j. T0 b
called by 按钮 'setup'' i1 @8 o9 J X: y* ~+ E+ q e$ p
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
