我编的程序如下turtles-own [energy]
6 B: `3 ]# e' t9 c6 d+ O3 _* mto setup/ P4 ]3 s% N" @# v z' ~
clear-all
7 b! L! y! @, B9 q" C |9 l9 ]& T setup-patches& J d$ ?( ^2 n% V0 {$ t
create-turtles 100
, t/ M5 u, ~) y5 \$ a* K8 x do-plots. V1 G) A: ? ?! Y# |$ z$ T4 Y, Q
ask turtles [ setxy random-xcor random-ycor ]
6 v: J8 j+ d; z) P1 `end
4 D9 a! m. ^5 ? Y7 l+ o: o: p8 Mto go9 |: a. k' j- \9 Q# i2 _
move-turtles
8 ^+ O N$ S) O8 Y9 l/ ~# X9 x! y eat-grass
2 r- O; N" n9 M, v* F reproduce
6 h/ k( P0 |1 y; _9 a check-death4 g/ X+ _) o% [0 g4 y% o
regrow-grass
4 H/ L6 ]! ~+ W8 l8 U- C+ ^" b do-plots: P) O, @+ b: B# y. w! G N: Y
end+ r4 Q6 G. d4 o8 [( V' u0 f
to move-turtles. B5 k5 J" B `& X0 U. l
ask turtles [0 C2 |3 `, Z1 J9 r- B' o3 Z
right random 360
; H1 C$ _9 Z7 t, k/ c9 s5 ~ k4 J3 q forward 1
4 B6 z/ x/ p+ u8 M set energy energy - 1( S- |& m0 f3 b* D
]
: _' S3 V0 d' g0 }( iend! G a8 z6 p+ r6 Q+ m7 h `1 @% V7 x
to setup-patches
4 N9 y( f- [/ {5 q4 D! r4 x ask patches [ set pcolor green ]+ _7 Y% ?! g2 P1 x* x
end8 j: x3 u- M" X$ E
to setup-turtles
( V8 |2 o# D/ ~+ j& |1 J# r& B4 i create-turtles 100
) V$ B( L7 A5 L1 K# | ask turtles [ setxy random-xcor random-ycor ]
! X8 b3 j5 A. X S: i' R) q4 zend
5 m2 j1 G z! i# Xto eat-grass& A" D% u( m" N6 N! F8 W! }! K
ask turtles [
' Z/ g3 e" A, f, w if pcolor = green [
) t. u! u. I, b- R# Y1 x set pcolor black W0 }6 Y! o- d8 c/ G+ U; W% w
set energy (energy + 10)4 k. o$ ~$ ^3 ^) @
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ifelse show-energy?0 u& Z: m/ s( e$ f; T' A4 D! v4 J
[ set label energy ]
. S6 M0 y! v2 Q1 M0 v [ set label "" ]
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! K: g4 `/ J1 Q$ M, E& p7 N5 jend
% g/ O$ P/ L9 g O0 @to reproduce3 o# e2 n0 F$ p8 ?
ask turtles [
& p5 g# w( N+ T E if energy > 50 [3 I( e% ?8 o6 x" C3 I& d
set energy energy - 50; j! b# K& j1 ^7 Y9 B6 X3 u2 q
hatch 1 [ set energy 50 ]
+ ? i" ~) b. B; P9 i& e ]
# x. U5 `9 ]$ s9 N, p4 _, O ]
% Q% n1 X$ k. y; X# ^end
7 H( y6 P I9 T3 ^- D, Bto check-death
6 d+ S/ O' O0 C: N ask turtles [1 D% y1 ?- S/ z! W! p
if energy <= 0 [ die ]
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end6 E8 n! f5 Y% g$ R" o- O* H9 _
to regrow-grass/ y1 i, J3 Y4 v1 i
ask patches [2 H+ k) T8 u1 g$ {6 C4 h
if random 100 < 3 [ set pcolor green ]. x) `) g, j4 k+ N7 H
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end
7 Q K G* x, D( Nto do-plots
( t+ @& g" Q% L k, E set-current-plot "Totals"6 x1 M% { v( a6 x/ ?4 Y
set-current-plot-pen "turtles"6 j! d e2 n+ A# l5 d( b
plot count turtles$ T9 ^4 u5 J# `$ W) E$ W& ^
set-current-plot-pen "grass"
9 L# w3 Y0 x0 `& u) w7 g: P plot count patches with [pcolor = green]0 g: q: T! q/ m" |- b2 e
end
' S9 `% U' ~5 c) y( {& B c可是运行时提示no such plot: "Totals"3 C, E! I w* }$ ^6 o
error while observer running SET-CURRENT-PLOT
/ E L$ W* d. V' _$ O1 L called by procedure DO-PLOTS5 p: z4 Z7 k7 ?: k# R% W; G# R
called by procedure SETUP2 }2 ], b: U4 y
called by 按钮 'setup'
, H: x% l* G' i) e) z# d+ a% p求大神解答啊 |