我编的程序如下turtles-own [energy]# Y, s8 D% w; S0 f% a1 N [& e
to setup# o* {# k+ |4 S* X" q
clear-all: J0 H; g7 y3 ]; X) T1 ~. I
setup-patches
% d' [( D' q C, O% f9 m create-turtles 100& u8 I% I9 _4 c8 X& m
do-plots2 s8 o* Y. Z; z3 [0 h, Q: F
ask turtles [ setxy random-xcor random-ycor ]5 _, `3 j7 P7 |+ D; |) X) v
end) J7 F3 L7 L$ ~1 n+ c+ g
to go
* P; O$ `& ?* K4 f$ y move-turtles
& L! E2 D0 v0 J5 x eat-grass
) m8 F. g- c- j' g reproduce4 B1 G' X7 V+ V( M
check-death
8 ]; B @) h/ ~# j, n regrow-grass1 {$ ^. M- t; A0 ~+ p
do-plots9 E4 Q: L2 `$ T0 c- z- q# j; u
end
! D5 Y6 ?9 m+ M) C9 Q. I4 E9 D6 ]to move-turtles& R. A( D3 G3 Z. o
ask turtles [
6 l) g' j" L* j1 ~$ s right random 360
# Q, K$ \4 x6 f6 g# o$ K8 i, B5 o' ~ forward 1
$ o0 N3 p. f8 {. b, n+ z set energy energy - 1
* L2 b$ o# c4 Z/ H! W& B ]
2 ~ R8 u6 [ W/ {3 x# \: Dend
' E4 r3 K" Y8 X$ X! y/ }/ Gto setup-patches" Z; {& j4 s4 j' c! w
ask patches [ set pcolor green ]' \1 f. [+ f9 L+ M% H
end
7 [4 ~2 @* D, u- Vto setup-turtles* y- W; l7 n5 M2 I) ~7 T2 ~
create-turtles 100 e, N$ ]/ p* n; q% j) Z
ask turtles [ setxy random-xcor random-ycor ]
, E# j0 h$ k0 E& U9 Q" Nend/ J- V5 R! K# t$ o# k
to eat-grass! P& h- ?# B" o- v% X6 i6 i
ask turtles [4 }" W/ c1 H1 ^; S( X
if pcolor = green [
/ h9 g* e7 l% B' r5 q h, H set pcolor black
$ A" Z6 _- x& {! z3 f set energy (energy + 10)
2 X; ~7 y, z+ K, k ]
. ?4 r' }/ S G& m ifelse show-energy?
0 X" D6 M* g1 R% y [ set label energy ]
5 e; c7 b5 z- W; G [ set label "" ]
2 b: N7 E- V) d$ w; I) Z3 L ]1 I2 ]' R0 X0 E) ^6 `6 [
end
4 i; y; E5 }& ?. }7 jto reproduce
+ r; l3 S t0 e1 H, F ask turtles [3 s4 }& y8 n; @2 g% u* i
if energy > 50 [
M& q" C8 ~% e& A/ d$ _6 [ set energy energy - 501 b/ V8 |! g7 J3 i
hatch 1 [ set energy 50 ]6 S. R' j3 d6 {
]
' g" z0 H* B4 w$ I' Z* q' i& Q ], `; F( `; x% p; m+ g
end& S+ H T9 |- K& W
to check-death) v# r; j! m6 h5 ~5 g9 s
ask turtles [
+ f! i( T0 ]% `$ c4 @ if energy <= 0 [ die ]
( C8 P$ l7 M3 _# z, S9 B! n ]2 D4 N4 ] E( _* p7 y7 u
end
3 c* z; f+ L+ [* n* F% V. sto regrow-grass: J! z# ~) P7 s4 w. Y O# I% @
ask patches [
4 m! z, F x3 U c- U+ b if random 100 < 3 [ set pcolor green ]! D) @8 p6 y+ p! I) X+ B
]5 \* w# M+ C( M8 Z. s. u
end8 Q8 w9 }4 t, P6 f
to do-plots
8 r% j8 H* C. @+ J set-current-plot "Totals". ^! q9 ]" _) w* i, e1 A9 O; s5 ^
set-current-plot-pen "turtles"
# o- {: G* |' G! h0 I" [3 c$ x plot count turtles
: D8 ` ~( T; Y p* j$ f4 i- u, J set-current-plot-pen "grass"
5 ]: ?- D1 I5 Z2 l. N, c plot count patches with [pcolor = green]
* X" D( o T! V9 W; K( C9 uend( } U. x+ X8 x" R! @
可是运行时提示no such plot: "Totals"
; Y" R& Q2 w. W* ^( Lerror while observer running SET-CURRENT-PLOT- S- \; [9 O+ S7 p/ H
called by procedure DO-PLOTS
, [ W# B- b t4 f$ a! l( f/ C |. ~ called by procedure SETUP+ u$ U* }) y% L5 j) j( F! J
called by 按钮 'setup'; ?% l) w6 ]$ @7 V' z6 e6 a- J5 n
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
