我编的程序如下turtles-own [energy]
; ], W) z' `/ J% l, D# z8 V+ Oto setup
* [# T* g) m9 i7 g$ Q4 `8 B clear-all4 u: [+ D+ R0 J+ B$ `: Q1 \
setup-patches5 O9 F: g, m+ }5 t2 t
create-turtles 1001 f3 a5 z7 S$ h; y3 A
do-plots% Y2 {. L/ V* a
ask turtles [ setxy random-xcor random-ycor ]
% a. M) _" T# ]- S/ `' qend5 }% `) U9 R: ]4 k) {
to go
" Y/ X/ ` {$ A% h move-turtles
) |8 ]4 n) g6 B9 p6 r T- ^/ T eat-grass# r, B. c. Q. D0 O' S* w9 P
reproduce8 p# K; j; \% B; x+ @
check-death1 B1 A% F( ^' V8 ~! J* E: Z5 T) O
regrow-grass
2 @5 E9 G9 h9 n+ C9 y8 m do-plots/ v7 N! G8 ^6 [# G7 x
end
3 s8 Q+ L5 R+ ]# U0 \- \to move-turtles
: W2 ^* | A- a1 h ask turtles [
3 r& X I1 |; w right random 360; h, D+ B; a) p" `3 a5 Y: |7 j
forward 17 Z! w) E6 g4 u& _
set energy energy - 1
" I8 L \$ }9 [ ], _( e+ g! Z; W$ i
end S* J; W$ b8 d7 l8 H5 X# ~6 \+ A* w% Y
to setup-patches
/ e; g0 A/ h; C6 v ask patches [ set pcolor green ]3 W5 C* S9 L2 x: \/ i
end0 Z& s3 o6 B. j6 ^- F, [
to setup-turtles
1 J2 Q) B2 x! f: C" h. g( d; Q2 @ create-turtles 100* F/ N# p9 a5 M$ W. x
ask turtles [ setxy random-xcor random-ycor ]& v+ @3 K1 o2 G& Q8 G
end
$ z ^4 q; \. f2 lto eat-grass
4 \ X. {- c6 ^2 Y K3 Q& F& H ask turtles [" j# s. k8 F* ~& f
if pcolor = green [
3 r5 F" ~: ]! B' W: U6 F; p set pcolor black) a2 H6 l/ g8 L& B0 r
set energy (energy + 10)
) l8 a! ` M, C1 K* ?/ t5 F ]
' L; z0 J) w: X: [" M3 J1 i ifelse show-energy?$ G5 F+ z, c3 v" |
[ set label energy ]
+ u" a7 g0 M0 |9 ?! _ [ set label "" ]( P4 D, W4 Y7 r+ C4 V; x
]. M* U4 h& x- v G: _1 @
end/ m2 i5 v8 J% W; U0 @, l7 t% W7 e
to reproduce; Q, j8 f: b6 i$ `
ask turtles [' ^$ G' r# g; G1 X
if energy > 50 [
. n! f/ Z/ f" P" I. q2 a set energy energy - 50
9 W2 k% h1 G1 d* t6 t hatch 1 [ set energy 50 ]' S$ F _! Y7 T+ h" a9 v
]: \9 c1 p9 }) z. H- N
]
1 B4 _' g2 F6 r6 @& q& {end. e0 _) K7 c; A. D
to check-death
s `3 J5 A! `, D% u ask turtles [
9 i+ u. k/ d# k1 z8 m if energy <= 0 [ die ]
( B& M! U& O- n# B ]+ x0 \( Q6 Q9 r2 e. x; L
end
. a" G! \) E! R, f" ^to regrow-grass
+ Q/ j* \( t. F; H3 F; {5 z ask patches [5 b/ S2 @0 N, ~: j" [
if random 100 < 3 [ set pcolor green ]
+ j h2 P2 B2 T" o: c ]
4 m( I" t) {, ]+ H) b; |2 |end
! {: v+ d/ I1 k1 g. `2 S! c) eto do-plots" W" V# F6 \ J" t5 N% T
set-current-plot "Totals"
' P! A: ^1 X W set-current-plot-pen "turtles"
0 v0 ]5 s+ h' o4 M plot count turtles
" _: k1 B- X. s4 ^ set-current-plot-pen "grass"
# Y8 [8 Y3 W9 s7 z plot count patches with [pcolor = green]
! l* F1 r$ F' Mend
& _& l3 h9 x9 u; n' X0 J+ l8 p9 Z可是运行时提示no such plot: "Totals"
2 N6 Z8 d6 p/ o4 ~; y& Jerror while observer running SET-CURRENT-PLOT7 ~$ u) g; X# K G" V5 t$ j; t
called by procedure DO-PLOTS4 Y1 w# o/ R" n! r0 U0 x0 l" e
called by procedure SETUP; y0 t. [# I m+ y8 V
called by 按钮 'setup'4 c& q( D! U$ c+ D3 ]6 `& _7 o; G
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
