我编的程序如下turtles-own [energy]5 E* Q& E8 m9 l Q
to setup
8 y# O8 a4 L1 O2 r5 T/ i clear-all6 x6 j4 u0 [! Y3 ?' ]" n H' y
setup-patches
- {1 k6 f: Q8 I: H* b+ Q( w% _3 A create-turtles 100
& q: N& q7 |! | do-plots
( I! s9 U' q3 a4 Y5 k) \ ask turtles [ setxy random-xcor random-ycor ]
4 b2 e5 @! I9 {; Z2 D( zend* z. G3 K5 t. v" h$ K7 N
to go
+ Y6 t$ A5 V" i) ~* I5 ?# n) u; S move-turtles, O) B. l7 z8 ]1 a5 P
eat-grass$ h; c# `4 U+ `+ |5 x0 ]/ N
reproduce
9 H( I3 m) H/ Q2 ]& p% _ check-death
* |9 e) n# E! [7 M regrow-grass- |4 c; ]/ @9 G. r, ~% N8 p
do-plots. z' {2 t5 k! y) W
end; y4 N' }4 J) @# |6 ~
to move-turtles
# [$ h- Z1 Y! o }8 v6 f# X ask turtles [' J' d1 r" ?8 e% }* [- m
right random 3602 B% H. ]* n! p) V+ ~. H% ~, F9 b
forward 1
* v% x9 n- w1 r( V' X set energy energy - 1. h8 Y& h3 W9 u
]: j$ h: j' Q* P% W! u% P3 g. G
end
$ D+ e% c: X) ^5 J0 Pto setup-patches
1 s2 N1 t4 t9 ^; W ask patches [ set pcolor green ]
2 m& o6 ^5 S/ B& d7 Y7 e, \7 f# g3 Uend
, \2 p" K* X9 N: B% e" h% M" g0 {to setup-turtles. D" K9 I# l6 T! U4 D- b. x3 h+ H( ]
create-turtles 100( m- L. p9 c( U( ~+ d# h
ask turtles [ setxy random-xcor random-ycor ]
% d) E2 l+ u7 P% J* s/ xend
# ?; S+ D+ T& r- ^to eat-grass& |% U5 `) ~# ^; }! r
ask turtles [' o7 v) m6 P; S$ }8 w' s& k& o
if pcolor = green [
: i" N5 B3 e6 L- R' ? set pcolor black
' q8 p( X" R* A4 ~; |% K set energy (energy + 10)
( {! o+ ^6 }/ V6 M* U; C+ M ]) a: h6 T$ K) E+ v+ g+ L
ifelse show-energy?2 }! ]5 o; ^3 D$ n# M& z8 }6 _
[ set label energy ]
$ u# j2 N% t( A5 A3 I* z [ set label "" ]; q$ t* W8 e* ], [" X6 ~4 p
]) S' j0 P( j$ [1 s7 [) P' A
end7 K) q# y2 o3 Q" a5 C, f! p
to reproduce
: r; b+ G& h [' ^6 y; M ask turtles [, e! I" x" C8 M7 N& n- t8 u
if energy > 50 [ O. t0 n" ^, g
set energy energy - 50
: n( ?" `5 }: J' e' a hatch 1 [ set energy 50 ]( A8 M; @5 F+ ]1 s; ]/ f
]
4 A- ^# C2 u9 W/ k ]1 ?% p8 U) ?" \6 e# c
end
4 w; z! V3 Y/ A0 |7 r1 Vto check-death+ Z; M) r9 ^, w0 n% K. [
ask turtles [
0 E! z, v$ |' V1 i! C$ O O" B% E if energy <= 0 [ die ]- d- o+ w2 D1 f z
], l W3 T& [0 u; ?4 E+ k/ q
end3 X1 C7 J2 Y. A+ G* G8 a
to regrow-grass
# \% v$ O, d& [ u7 b ask patches [7 Z7 d- d! o+ f( z+ D) \9 z
if random 100 < 3 [ set pcolor green ]
& W6 t p2 Y& {: Y- Y ]1 }# w" O: O$ W) J2 m$ L! y
end
2 M" A# ]+ Y% \to do-plots
- l! X7 b5 m$ ^' v4 N3 u' `& L$ T set-current-plot "Totals"
" \7 ]! c2 [" @& `0 M% L! x5 J set-current-plot-pen "turtles"8 u! Q; Y0 G- }4 x
plot count turtles$ G/ N6 h4 Z. I, _) w g- q( o! N( z
set-current-plot-pen "grass"
3 _, i% Q) m o- @% { plot count patches with [pcolor = green]
! h0 R. f3 H& r, f2 R3 L. zend
' n& m1 H! S) I可是运行时提示no such plot: "Totals", @8 W7 S: T4 Y8 `+ n
error while observer running SET-CURRENT-PLOT. ?4 f$ r" \- Y* z
called by procedure DO-PLOTS2 `9 R J" Y$ }- n9 _
called by procedure SETUP" `% S7 e, Z$ H/ H& a
called by 按钮 'setup'6 F" b' }1 Y5 s5 }) A7 Z0 Y" ]
求大神解答啊 |
[复制链接]
楼主
发表于 2013-5-29 00:25:38
