我编的程序如下turtles-own [energy]# _: y0 X/ d0 e$ ?
to setup% q- v, `/ ^4 c( F4 Z4 L0 M
clear-all
- s" I% N! y, {, B setup-patches. D, z' `% N3 p! }3 q
create-turtles 100
1 n. F' `9 a W6 f% z: `2 f do-plots; ~$ m8 s& Q, |- M: q& O0 P% S3 ?2 ]
ask turtles [ setxy random-xcor random-ycor ]
- p/ \2 L0 v/ |end
" I; ]2 u/ j. ?5 J% D, Uto go
9 L e- x% }4 p$ }$ u% Q move-turtles% h8 Z" A; Z( W$ H
eat-grass
# \& l0 v& x+ J6 j9 e ]8 j. {/ i: ^- } reproduce
* X) i' L* S6 o# j9 I: L7 C7 T check-death# ~+ }2 S7 P8 x, l) x
regrow-grass7 \' k5 X3 e2 ~" x
do-plots% J7 l7 ^+ t( M0 B% ?
end
# {# V" c. {0 l0 Jto move-turtles, u/ G$ `7 x$ I0 d7 g2 u! y
ask turtles [4 V6 I" w, F' b0 [2 ?
right random 360; B" K9 G3 v& U) z* `
forward 1( E1 @4 J! ?) n+ v5 @
set energy energy - 1
9 s- D2 g3 ~+ X4 A2 H I ] a4 v( Q; c5 |7 _7 c* M
end
$ z" X8 r* G3 fto setup-patches
; [0 n* t# |+ T" E ask patches [ set pcolor green ]
* h; [: a/ B! w% N3 E9 ]$ vend! T; L' U! p/ _, J- B
to setup-turtles$ h; U" q# V! P" [2 ^% m' |! ]
create-turtles 100
3 s+ u- N& f$ f& I; I ask turtles [ setxy random-xcor random-ycor ]0 h; f, z9 A( E% k6 l- M
end) C# d) G, A0 M K8 l
to eat-grass
4 q7 E" W8 x3 K8 ` `0 Z) o ask turtles [) z; Y$ j, J2 Z7 k s* l" D" u8 g3 q
if pcolor = green [6 J6 Y( f0 s# I4 l' d# K- S- C0 w
set pcolor black
' M8 S$ n4 v5 S& {. S3 \2 v" i9 |0 A set energy (energy + 10)
* A1 z$ _4 P, @: }5 T. Q: } ]
* ^" Q" [: v+ d. i( S ifelse show-energy?
1 s' r* @+ G9 R. \ [ set label energy ]. x4 K" M" N; K$ z
[ set label "" ]4 A2 u6 o/ e6 R7 A* B- X7 H! ~
]! F0 O) t' r$ T6 h* n
end
. U2 M P t9 L* I8 I+ I& a7 p' s7 {to reproduce
9 v2 _' M8 d, [+ T* ]5 } ask turtles [( I9 }* `+ u& O( ~" Y: L. p
if energy > 50 [
1 \) U# j1 O9 z* f2 x$ C$ b set energy energy - 50/ x# J( `! e- T) C% y
hatch 1 [ set energy 50 ]/ H" V) P; Q& O n$ T
], W* p# k6 _" e- y4 \6 w
]
0 J2 u% i8 v/ q( z2 Z- Wend
& i1 Z0 ?! z; y. X8 ]+ |3 Bto check-death p t- v5 X' r) \% }9 X
ask turtles [7 X: d8 y$ ]; T7 ?/ H7 F
if energy <= 0 [ die ]
) Y; L. \. N2 s6 ^" ? ]
4 c2 r$ A- Y7 K7 t/ Cend
, q; [3 g3 u+ t) Mto regrow-grass
2 R- e) V) q5 t! O' k5 [ ask patches [" D' Q+ I5 e$ X& G* a5 R& y
if random 100 < 3 [ set pcolor green ]( X9 u: N, Y( e
]9 L# N+ _0 t H
end
; ?7 E" ^; e# J. R( H' L0 ]to do-plots' _2 ?$ b9 @% L. E6 w$ i6 W1 l
set-current-plot "Totals"% X) u" X7 W! u2 o. O
set-current-plot-pen "turtles"
+ Y& P+ N1 D, x2 q% P f0 i- r% k1 K& D plot count turtles$ A! M, t) ^" l0 r5 \
set-current-plot-pen "grass"
3 D# Y- \9 A" r9 {9 _9 W) P. e: L plot count patches with [pcolor = green]+ y! H1 b* ^8 m, i7 j8 P
end
& p% j' \+ {: R7 q# e可是运行时提示no such plot: "Totals"
8 V) i& P( T: t; H3 m) lerror while observer running SET-CURRENT-PLOT5 |& _3 c! V; ~ u" a% O$ M6 r
called by procedure DO-PLOTS
/ F. ]; v7 X+ [, p# F* m" D- T called by procedure SETUP# i" ]! Y H1 X! e2 f, y
called by 按钮 'setup'
; ?8 Q" t+ B" f, r求大神解答啊 |