我编的程序如下turtles-own [energy]1 M3 l7 O5 W3 w2 S
to setup
+ P# x( d+ T( }. A2 }2 ~ i clear-all* O I# L- t9 H- a( @2 [5 w6 S
setup-patches( {7 d) E2 {$ K* T' z4 m5 i$ k
create-turtles 100
: V) L4 I2 p) x+ K* A2 X do-plots, Q+ x5 g. p8 \+ G9 ]3 g8 J
ask turtles [ setxy random-xcor random-ycor ]" O% R0 S! y4 a
end
, i! F; v: T4 a; ]2 Kto go
, d2 k6 _# }# C' f8 y0 e& j6 X; v move-turtles; Y Q/ s2 t) L: e' l7 x
eat-grass
1 \5 Z' M$ _* s R3 ^ reproduce
4 A# g# {0 `, \4 |$ `5 A check-death
" `+ A+ m) D6 H regrow-grass
% i! T0 f4 D. T ~ do-plots9 A% Q, _0 ^5 D! l+ v) e
end
9 `4 ^0 o! ] U O' ^3 bto move-turtles
4 }: h% N- o! B$ m ask turtles [0 Y6 D. f% \9 t; h" |6 k, Y) X
right random 3602 v& G. E* e* Y: M7 i+ O
forward 1
& B1 ?$ Q) ^4 b' p set energy energy - 1
/ v2 q L8 v+ f1 i ]
% V+ t- `: _5 S7 T4 eend; Z- P' T% P6 F: @+ ~4 m0 h
to setup-patches! y8 G5 q& g2 d& f9 }: l) ?% a
ask patches [ set pcolor green ]
- @8 o K% H/ xend0 z" @( C0 V# {& g, u! D. K. o) M
to setup-turtles+ z& c: z h0 a0 [7 Z
create-turtles 100& G( r. e7 `6 Z3 o3 A1 v6 f
ask turtles [ setxy random-xcor random-ycor ]$ I! m+ |* D' P) G6 _3 K! g
end' S- e0 ^( Y7 F7 G6 d' W% r) H
to eat-grass
) X3 C6 ^# \2 o ask turtles [
8 T3 o& V9 k0 |$ k* t& g* J4 W if pcolor = green [- s$ Q. ], h" q) E7 R! J3 [) Y E! o
set pcolor black
# `: J6 h; d3 Q set energy (energy + 10)
) K( }) i1 ]% Z5 M( q. k ]# X1 r! F3 V9 [1 z% G3 ^ W7 y! j
ifelse show-energy?
7 ]1 {# c' g1 l; v- Q [ set label energy ]2 r1 d1 i# y: _ J4 o5 A
[ set label "" ]' p3 Z3 S: J+ u5 h/ z
]
, Q6 w$ N: B7 xend
9 D$ ?/ F5 d" s$ d- J7 Fto reproduce
! o5 Q: h# |, j ask turtles [
8 u$ n8 e1 r. s, H; O$ G if energy > 50 [
: h) n9 D7 a, _ W# r set energy energy - 50! t; D( D4 M8 u0 Q
hatch 1 [ set energy 50 ]9 l, y1 Z) d F% i9 l0 `- g
]3 a7 ^6 q' m( A. E7 m9 t
]
& c! T0 `. y3 N" G: Tend5 G( ^5 b. L. ]3 \, W3 @5 `
to check-death/ `5 ~9 u( X8 U( ]8 B
ask turtles [
, H+ I4 l" I, s* n if energy <= 0 [ die ] @8 B- K0 f3 ?# M. D* W& o- T
]4 b7 d0 }6 O' ]2 |
end
8 F3 p5 y' G% S! `6 lto regrow-grass
8 r4 Y, c7 t+ b7 w4 a5 O' }( k0 A ask patches [1 C' }# Y5 e6 T. Z) j
if random 100 < 3 [ set pcolor green ]
7 q: C3 E& O* ^$ d/ ^$ t ]+ F' b! A& S4 t" C) c; z: a
end+ N2 b. S8 H6 p7 b/ D9 I
to do-plots. g! T# G- g( J s' r$ S1 O
set-current-plot "Totals"% b4 {' j5 x. T, `& U0 g% ]0 f
set-current-plot-pen "turtles"
: V2 p" |* e0 ?+ ~ c, G plot count turtles
* {& F* P/ j7 q8 M9 A set-current-plot-pen "grass"- P. b5 ~+ u: }$ @" n4 ^
plot count patches with [pcolor = green]
4 M' H' O" z8 x0 V$ ]8 H6 }% uend
: c) B+ P$ o- _可是运行时提示no such plot: "Totals"
3 Q @$ G. q# i$ Merror while observer running SET-CURRENT-PLOT
0 ]4 a' a! q+ h* R7 q0 F called by procedure DO-PLOTS
. N0 Z* T8 e m7 X/ E$ d called by procedure SETUP# {8 o( }( {' S
called by 按钮 'setup'
# {' h3 \% O2 { P* @" S/ Y" K求大神解答啊 |
[复制链接]
楼主
发表于 2013-5-29 00:25:38
