我编的程序如下turtles-own [energy]
2 r1 }1 q& h# M8 o/ vto setup
! P- A; S5 p- K5 x clear-all% {/ k2 r% g6 D3 c; D: Q
setup-patches6 v' ]7 t' t1 P1 |) m" w0 O+ U
create-turtles 100
$ G. O# a1 X! s0 q! x do-plots
$ O; |9 t- e# }0 D ask turtles [ setxy random-xcor random-ycor ]! Q, V; s: @, X6 m, }1 t& P& W% q
end
0 ^, a- \: S+ K$ y3 f0 R9 kto go
5 g* P' x; u/ A8 S$ o move-turtles; a" c4 k+ s% s; W# ?
eat-grass
* N. ?( Y! I, }- \$ y% z9 P reproduce
8 Q6 @: p8 _; g* ? ? check-death
" U/ Z: Z! K9 [% K3 B regrow-grass
- n8 }2 r5 h0 l9 @8 a do-plots
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to move-turtles/ n( D7 U- C' I/ N6 {3 P9 @
ask turtles [$ i: S3 ?( B! L6 q% ]: R! q9 R
right random 360% ]% a% l5 \$ V! D$ j, I
forward 1
: _8 `% s& _) a' v3 E9 Y set energy energy - 1/ i" W% L# \& C
]- `+ S) t7 U. u2 ^" S
end8 E C$ }7 S& Z8 }
to setup-patches# } d4 y: ^( L g
ask patches [ set pcolor green ]. ~( L m3 A' ~2 V! n
end2 _) d# |) i0 P& V2 d8 {6 `
to setup-turtles
' j, g# A0 J9 s& v create-turtles 1005 I. E& a$ }* T, v, e, S
ask turtles [ setxy random-xcor random-ycor ]. Q$ z: z. _! s7 w# ?6 O
end
/ G3 i7 K2 a& b, q+ r2 Y) |4 F" }to eat-grass
! T: _: m" w- }3 {/ y( E# Q& P ask turtles [
6 p* R9 }$ F. f: V0 k0 x if pcolor = green [
3 h7 C, O J. _ set pcolor black; a1 v# s' w& x- s W1 f
set energy (energy + 10)
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ifelse show-energy?( d8 E% _1 q& z6 ?3 \4 ]: d8 W9 I
[ set label energy ]
0 {. } g* v1 Q$ l5 K/ | [ set label "" ]- ^4 s/ k" V! I8 d7 m( o
]
' A2 J) h& B1 S1 Fend
" K6 }2 E% A8 C4 Bto reproduce: c6 H+ Z8 v( G3 c
ask turtles [: G2 y, f, s' F5 K3 q5 h0 R
if energy > 50 [- I9 H% u ? x
set energy energy - 50' f. J( F% C7 N9 c2 G
hatch 1 [ set energy 50 ]
* S& o( Q% R( l3 S, `' l. z ]
2 Y6 X5 c% M) R# a# j2 M- @) k8 ` ]+ s7 ]) C" j6 d8 a0 I: L
end
0 L/ X8 D3 O# L+ \) a: _9 T3 y9 H$ dto check-death
$ r- M0 S! a* I' v# I4 u1 T" b ask turtles [+ [2 d8 B/ I3 T3 Q J
if energy <= 0 [ die ]
: t3 g8 e# _* L' @ ]
) l- e- A/ K& N* n. zend/ C* T3 _, n+ e0 N. W" o5 U/ ]# O' f
to regrow-grass
! b, C1 r- X* s# E7 y. ^' G; Y4 \ ask patches [0 X% x- c: D) s" v3 F
if random 100 < 3 [ set pcolor green ]! C/ E `6 O1 s* ?1 ^# ~4 Y
]7 O4 l7 h8 G1 |- ~( W1 y" Z
end7 @6 j2 E/ F6 F* s; I
to do-plots8 @3 t& c% F8 `
set-current-plot "Totals"
I5 k$ D: R1 q3 g/ c: ]( u set-current-plot-pen "turtles"
, B8 t( a. L6 y% ? plot count turtles, G. X, R- V" J
set-current-plot-pen "grass"' w' k3 I, [8 Y. |* m! O- ?4 G
plot count patches with [pcolor = green]" v( h2 F: O+ a0 r) y
end
/ j; v4 x2 E- {& i. D: e q可是运行时提示no such plot: "Totals"' f' Y# F, D$ G* i0 S2 S
error while observer running SET-CURRENT-PLOT1 C8 f1 s" f) B2 l7 X, |
called by procedure DO-PLOTS9 \* B8 O/ C! H1 f
called by procedure SETUP
4 u9 n0 l0 G+ P$ Q" A! [ called by 按钮 'setup'. I/ ~* ^4 O1 [3 Z; X* s
求大神解答啊 |