我编的程序如下turtles-own [energy]! e, j$ a- `: H4 S3 z q
to setup
) i8 l/ u$ ^9 W& T5 H clear-all
5 i/ t8 k' E: I) O2 U6 H setup-patches
4 G* n3 m7 U0 q0 V0 o, \8 E create-turtles 100
8 V5 A- ]! N: u+ a) _ do-plots6 N+ N9 {* E. C# ^6 V# N4 F
ask turtles [ setxy random-xcor random-ycor ]/ ^7 }. |" \: @
end
" j5 _! M& t7 Zto go: w4 J+ ^. [+ w' J/ L; w' h) l0 S& \
move-turtles5 K# M$ v- @4 c6 R2 p' b
eat-grass9 P* S$ {. |$ [4 u8 S
reproduce
* y% n; Z" m' i1 ?" i! i d% | check-death$ c8 v! }% J$ g& i$ }
regrow-grass& T" V- z( k0 |# ^. J
do-plots
. H2 `1 {6 q' n. _4 Z5 K! uend8 k5 a1 j$ q6 N8 o. a$ R
to move-turtles4 k$ c0 R0 E8 T4 v" U2 f8 e
ask turtles [
: D( V4 r% S3 [$ i2 e right random 360! X, v% `. Z6 Y; R/ k. E
forward 15 x) S: V9 w& }2 w) G
set energy energy - 1
7 G7 ?, N9 }9 B$ U3 R) C- v ]
, H$ h$ q) Q! B' c) r* Y1 Wend
$ `. V( \. m+ k4 A# K$ e( n+ Kto setup-patches% m$ f: d* g9 V7 }8 T- e3 K- D0 e
ask patches [ set pcolor green ]2 o% `& H' _0 G$ D" `! f# a: I7 P" c
end
; b2 O! ?* h8 ?7 O }$ rto setup-turtles, ^+ [4 g' R7 j/ B7 S5 P
create-turtles 1006 r, i7 p3 @% M/ n8 n9 i/ M
ask turtles [ setxy random-xcor random-ycor ]
3 X3 ^9 k* V) k8 M' G9 bend
$ S% p$ [ h! C, _to eat-grass
1 h* \+ Z# K9 v" s! u ask turtles [ z0 y4 E; M5 C* r) E
if pcolor = green [* g1 P4 P* N/ n3 l
set pcolor black
. u/ h/ `- O6 X1 l6 U) b set energy (energy + 10)2 J! m9 s C5 \, ]& h0 a) l
]5 C/ m4 O K$ h2 w$ v* N C
ifelse show-energy?9 G$ o5 [, N8 ~$ J8 q2 c/ z
[ set label energy ]& u. t7 y Q0 n- \# t: `0 C
[ set label "" ]3 O* o0 u+ p1 r/ Q4 [9 R
]: _0 d, |/ a9 N7 m
end% S9 T0 I4 g0 k E# q2 }
to reproduce
5 o7 t3 ] d( N! O: L0 I ask turtles [
; J6 v8 O+ m2 i7 L0 C) T if energy > 50 [
' c% K1 V% L) I set energy energy - 500 l' Q9 l$ D0 o
hatch 1 [ set energy 50 ]3 s, g+ i# {* s, j) V: O( p5 s+ t
]
! v5 k4 k0 [ f) d5 v- M4 z$ T0 K ]
5 \$ q" v! N- L0 Rend
2 b. e4 E4 {+ Xto check-death
, t) V. t$ ~* S ask turtles [
6 H5 d, [& Z( H! ~. h* E1 T if energy <= 0 [ die ]' w$ c% j0 P. g) w: R0 q( X2 x
]
3 V0 a3 c: B6 J# L. G. q2 oend- k* D, a) O2 h! C- `( K. Z
to regrow-grass
- X0 `/ p! L9 d: e ask patches [
7 y. J9 S: X- k if random 100 < 3 [ set pcolor green ]
9 X" c+ ]& ~. |7 r9 x% J ]! A' |. M/ R! X0 Z- l; E* @3 c
end$ o% }+ m+ z2 @
to do-plots
9 f. |6 @# W% U w1 B set-current-plot "Totals"
6 Q" g0 i$ R0 r! ^6 F set-current-plot-pen "turtles"+ ~& W0 t: V) l. W
plot count turtles( f0 f8 I9 p2 t$ _) }2 N, ^
set-current-plot-pen "grass"
! _" g5 {& {# ]6 x& j+ U* `# ~ plot count patches with [pcolor = green]- j& U; A0 G5 D* W9 {. s
end
6 j& ?7 X' d) _3 [ s' B& T可是运行时提示no such plot: "Totals"
# Z/ h; H6 l/ k; t( E, eerror while observer running SET-CURRENT-PLOT/ M7 G) j( u) }5 d P& |
called by procedure DO-PLOTS$ m1 F. q9 K) u1 i: Z
called by procedure SETUP3 [" H* O& W; j
called by 按钮 'setup'
/ o7 U( _9 Z3 z$ u. w+ G# m3 a求大神解答啊 |