我编的程序如下turtles-own [energy]2 Q5 j+ s# e3 Y
to setup
& a* g' P$ }' O/ m clear-all
4 a6 }2 [3 ~/ ?4 I5 A& D setup-patches
$ `, Q0 R; h' ]& q/ l9 ` create-turtles 100: ~8 \; s k' \3 Q! E/ D5 ]# y9 b5 j
do-plots0 i3 e' C! |$ ?
ask turtles [ setxy random-xcor random-ycor ]! f* _& }8 e% H3 @) r( N
end
5 g& Z- ^. ?8 `9 ` o# Rto go
! ~1 p \$ `/ W& ` move-turtles0 P# o$ L7 P Y/ |6 f
eat-grass& l- j: U m/ T' @. z
reproduce+ Z" @5 S& B* r! }1 @6 b9 x
check-death) E4 L" s- m! K9 M) M
regrow-grass8 O' h2 ~, W3 F1 z
do-plots
s! Q3 n- k( V% E! D Eend
) Z2 t$ E, O6 ]6 |+ b' mto move-turtles
^. b5 R( b+ I! z; {: M: S) ?0 g0 u0 F ask turtles [
2 L6 f9 o; K$ K) Z2 |3 ? right random 3605 S, ~ S" P, D# e8 Q2 g
forward 1- f0 q: C1 W. d2 a0 I! C( m
set energy energy - 1
0 h; G0 ~/ _+ M4 G2 b: F- r: m+ i ]( X- c( |# m% T" ^6 x
end; T Q, r4 Z( R, y8 E9 N" K
to setup-patches: Y W4 Q& l! G4 ?4 l
ask patches [ set pcolor green ]
4 Q% X7 N' m8 R! C* ]* h7 @; ]end
6 q# @1 g6 i) @3 Ito setup-turtles
+ Y0 [+ o* t( h4 e: a$ i. j create-turtles 100
: P4 r" X# \" Q ask turtles [ setxy random-xcor random-ycor ], Z7 ~7 L8 v( z7 c y7 q; w0 r
end1 l$ g5 L* j; z$ P
to eat-grass# p' }" e/ x* g+ a
ask turtles [" m: F; a5 y8 ~1 o
if pcolor = green [/ d+ G3 z2 |# \' k! B; ~5 ~
set pcolor black
. R# \2 W& V, c0 T. r C; ~ set energy (energy + 10)4 |6 y, @; A# ^5 x
]" a, L2 |& y* `" a$ ?' H
ifelse show-energy?
1 J' b% V/ h4 x$ ]3 G1 W' [! o [ set label energy ]% U* q, I( A9 A4 t0 j, w0 G
[ set label "" ]
: x* j4 ]$ A0 {: p3 I& y ]
2 o! |, U- Y u1 J/ W" Pend7 ?! F) w! g y
to reproduce
4 q g* g9 n! E( I" ~8 }! Q! w ask turtles [
. r" L5 W( ]' z if energy > 50 [
; [' t; w( }) j9 |% ` set energy energy - 50
, {. ^* S) \7 e) Q hatch 1 [ set energy 50 ]
1 L6 A" F' @7 M3 m0 u$ l0 Y7 b ]
0 o* j3 U& q8 N" W ]
6 O* U* K$ D7 Y5 P9 m+ Dend1 y7 ^; q1 R) j' T2 @4 B; [
to check-death
& f% w: p+ [- r6 Q ask turtles [
+ Z. y% }* Y* b0 b2 _. l if energy <= 0 [ die ]( D( J* @" |& h" K5 q% M" j+ C9 E
]; H& {- Q {& i \1 B' v; V4 [0 G
end
}9 b' M/ j* u7 e: \- @, x9 R! Zto regrow-grass) A2 @% e! l6 a% }) Y, s% n! [
ask patches [
$ e1 B( p9 A1 o2 ~6 c5 q1 }/ t, t! N if random 100 < 3 [ set pcolor green ]
8 h& f/ w! e. T0 M" t ]" l8 H9 `1 l# I1 _
end6 W. L* _7 q5 |7 B" j, N) ^
to do-plots
/ S7 y0 `- D: e! F; ]5 [) }8 p/ R set-current-plot "Totals"
( C; G! B+ o; N) z set-current-plot-pen "turtles"$ R% t) s9 z* R" b4 A% a$ P% ?
plot count turtles
1 ]7 |$ o( s" O6 l, t set-current-plot-pen "grass"9 l+ C% ^5 N9 {8 k- c! Y1 ~
plot count patches with [pcolor = green]
% y8 }$ Y" W- p3 L4 }end9 [$ l. W {6 X) {0 L4 T% n% K9 E; V
可是运行时提示no such plot: "Totals"
, e# R& u% }+ _error while observer running SET-CURRENT-PLOT5 E7 L, ~# j$ _: s/ D
called by procedure DO-PLOTS
7 t/ D3 ?* R9 U, ?" k called by procedure SETUP
3 e# v+ L; m. T% w called by 按钮 'setup'
8 h, W2 Q* N3 ^' p! R0 m求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
