我编的程序如下turtles-own [energy]
, Q* `3 K4 ^+ W2 D. A) jto setup
& N2 k9 S5 n& f! b: T clear-all- j- S) G4 |3 k1 s9 B$ x' X
setup-patches8 K2 R+ Y# L/ ?9 o( V) z
create-turtles 1001 B9 r/ o6 _( a! L7 C
do-plots5 }2 Y5 b X% M# e
ask turtles [ setxy random-xcor random-ycor ]
7 b! l; n- s7 L% x; V `! Mend- {3 y r; A) v" j
to go
# t8 d7 a2 D2 F* l5 h move-turtles+ i( E* t' O r" @
eat-grass+ {& ]9 b, v) ?$ d* s) o3 D4 j
reproduce
; ~( [2 m" v2 s# x5 O y4 \9 D- A0 z6 \' Z check-death
5 I( V5 o6 x' ? |6 f, H regrow-grass
5 M+ t7 z b1 h# U1 [! S do-plots
( {. O d# i2 z- Vend
5 J. Z+ z9 B- _/ D& Tto move-turtles
+ n) K* p. j1 o( y" Z ask turtles [+ k3 X e( v. B+ i
right random 360
& C n, U5 u- M& R; K+ F ]2 I" x forward 1
: a/ }+ x# p7 d! t: f5 b* f set energy energy - 1
' M4 o O5 [5 ~ ]
& x$ p1 a( A: k- |1 k3 C& P$ h3 M7 mend
1 C1 O7 k1 A# ?6 }/ vto setup-patches
2 I. }' y7 x) }& o3 G ask patches [ set pcolor green ]
& }, A: I% v7 X# Z' Lend
' ^3 ?6 X# b1 A. R) oto setup-turtles
& e4 M% z. k, z9 h3 A/ U3 o create-turtles 1000 V0 \) P+ k+ T' v
ask turtles [ setxy random-xcor random-ycor ]+ l4 F1 g/ E2 K3 r6 E0 Q8 D8 ^
end8 ^% I1 S) b8 p3 C
to eat-grass5 Y1 f2 C6 U5 V K8 @+ _4 @
ask turtles [
7 G8 G! ?5 _+ Z" T1 N if pcolor = green [( _% F0 u5 V3 c( l+ Z
set pcolor black7 ?# T, O( U' U+ m* e* {
set energy (energy + 10)
6 B2 r: `. z: }# [: [$ _$ r u, w ]4 Y) }0 G8 ^/ E3 Y2 v, z
ifelse show-energy?
$ i0 p' O. n0 O; G3 ^7 ~7 k [ set label energy ]
. ?+ W6 Y& h& ]$ { [ set label "" ]
: u/ G2 |. B! _ Z ]
4 L8 D0 Z' R+ lend% F+ T* _0 i8 m% y( s' y
to reproduce
9 S4 R# D. b9 W# }8 B1 _" n, k$ D. S3 m ask turtles [
( G& v$ E7 O0 ?- g% B: W if energy > 50 [
' q) V( H5 E. r set energy energy - 50& [( U/ U/ @" ]
hatch 1 [ set energy 50 ]9 M5 `6 n' ]1 D' Q1 P
]3 g g8 [# e. Y6 Z8 ?+ b V
]0 i% L, D& G4 x0 Z% s+ q$ Q
end
2 Y+ p# K6 f3 X9 t: ito check-death
y+ T# E- D" T& Z# x: ~9 k# r ask turtles [& q3 K- `" ^2 j5 s: C4 b- S( P
if energy <= 0 [ die ]
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end( ?" g; Z* e! H: u' |6 u: X# o/ K
to regrow-grass
4 F! f' G' `; m) P: `' p ask patches [+ v7 ~' n3 J6 u$ o7 q! l
if random 100 < 3 [ set pcolor green ]: m" X! K% u$ F) {1 S
]
! ~! r) K0 O! B' ?6 T0 E/ mend9 |/ n% u- b+ N5 H+ m1 S
to do-plots& H2 D3 W$ y- f
set-current-plot "Totals"
: F' D( M- Y- r, o, n! V+ W set-current-plot-pen "turtles"
* X+ i4 r/ n0 @7 U: ~ plot count turtles/ M! i; S m/ _: y
set-current-plot-pen "grass"
, `2 |& I' o2 l! k1 p' O5 J' p plot count patches with [pcolor = green]
; K- l* Q7 F# s% P, ~& b. G5 Yend" E1 \. i4 l8 {: z; B
可是运行时提示no such plot: "Totals"2 x5 U8 J, m! ?4 R8 T. o% P
error while observer running SET-CURRENT-PLOT
$ O" `9 M; w7 z4 v! q0 o5 K called by procedure DO-PLOTS/ T( f h2 N' Q
called by procedure SETUP
: ^ ~: o6 ]/ Z9 k3 L$ E called by 按钮 'setup'3 P5 ^0 s* I0 J' j+ }8 a
求大神解答啊 |