我编的程序如下turtles-own [energy]
9 K q% j2 W* Nto setup
) b7 L5 \8 S" D- L+ e% e clear-all' u9 z2 ]1 T* g9 w) G: u; l& ?
setup-patches* w' ^( N O" C6 a- D8 N6 \
create-turtles 100
# h e6 F7 m' N6 H( B* a2 ]3 A do-plots
" @) T& I3 Q4 }% _+ X" |5 w ask turtles [ setxy random-xcor random-ycor ]
% ^" b( w6 T$ \end
! t) P6 T. H% ]" Q9 _/ n' Oto go
! H! w5 \ N3 e9 S9 y1 ^ move-turtles
( C( w+ F5 r8 {4 Y5 Z Z eat-grass
. z! n) P* x$ W reproduce" E( r) Y& x, k) F1 \4 p2 Y. ?" I
check-death
/ F/ n7 M; ]! { }1 z8 L& \ regrow-grass
, N& i1 t3 o4 R9 ?* t do-plots
. K$ s) y. q0 D7 q2 Fend, G+ W1 x- D! i
to move-turtles
2 Z+ b1 s' u/ S/ b- C3 C$ o ask turtles [
8 R L7 j0 k5 d* G" q, _& {2 L right random 360
/ o0 r1 y+ C9 S& A7 ?/ P forward 1
: z& V( n% u0 K$ d set energy energy - 1
8 D) r5 m) Z9 |. J8 M7 w ]
) @ `" c4 q$ ~, m4 H# u' aend( Z+ g; ?% C' P8 k" s2 s/ ~
to setup-patches
4 ?' l" O$ @8 Y! V; t, `, [ ask patches [ set pcolor green ]* C* U/ a+ U, m/ B) {& g9 E
end7 [2 L3 v. x* u4 F4 q) S
to setup-turtles
( w' p* U. y* x4 d2 ]$ A6 M- T* ~ create-turtles 100
- b) w; }. k' ] ask turtles [ setxy random-xcor random-ycor ]" D5 u% i1 b* M/ D6 l1 u" W- P4 m- d* i8 q
end' ]+ r3 x! v3 C3 i, r! D% ]" P" Z
to eat-grass% ~# ]( y- E: K! m7 K
ask turtles [& r" L5 |1 ^0 o- M0 J8 {
if pcolor = green [, K( @4 F* u6 O! i6 v
set pcolor black+ a) J0 d1 `6 I. K
set energy (energy + 10)
$ B' [7 l$ }2 B R" E ]
, ?& [+ v6 g5 @8 @' H' c- v ifelse show-energy?: l3 Z0 [7 B# j; v8 k
[ set label energy ]
# I" L! E) l0 T. }. v3 l [ set label "" ]# @0 x/ W! c* m' B
]! j/ V8 F, v5 G/ U! C
end0 ~* F5 o3 n+ j; X+ D
to reproduce/ l% g4 `/ ^: {, Z( g3 ?+ _) z" [
ask turtles [
; z- e8 P4 ^3 V if energy > 50 [
7 r6 B6 y7 t" A- Z. T3 r set energy energy - 504 F6 c! O! @) u2 r D
hatch 1 [ set energy 50 ]
8 Y3 i% n) `# z d A ]& L" a* c+ H0 t& H" r& e
]
$ x6 G9 C; p% B( F1 Aend1 j$ o. K9 k+ b+ S
to check-death8 _3 k2 n$ S4 P$ X; h6 j4 ?
ask turtles [
! B" h$ ~1 p4 o4 \' T0 J$ j1 e if energy <= 0 [ die ]
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end
2 N2 |8 n8 v3 l+ g: D$ ito regrow-grass
S; p k$ M- H3 P3 L# v ask patches [
" {$ d+ ~, p& n4 M if random 100 < 3 [ set pcolor green ]( D5 X% l# P5 k, F$ k6 b. {
]$ l# o9 ?6 r, V4 j- z0 C
end
" R7 J" ~" d! t! v- u4 ]. Tto do-plots
6 Z% F; ~. n h& W( d6 ?* f8 V set-current-plot "Totals"* K7 z: N2 t7 J
set-current-plot-pen "turtles"
! A6 k9 A( `: T3 C, t/ v8 q# s plot count turtles
0 V; |. q7 D4 Q1 l2 E9 d9 h( b set-current-plot-pen "grass"* a4 M3 h6 z N5 A8 r
plot count patches with [pcolor = green]) N! V2 s& l' t5 o- t% P% r: H
end' i! n8 f8 Q# _, [$ w
可是运行时提示no such plot: "Totals"
8 M! q5 m7 p1 H3 {6 L1 a. ^8 B* Verror while observer running SET-CURRENT-PLOT) }* m0 y/ L& t3 }2 j
called by procedure DO-PLOTS
, L C! p) U. {: l, }7 J called by procedure SETUP
/ V7 p! Y- M' ~2 p1 r! v0 [8 J) f* B called by 按钮 'setup'
! a q7 N, Q. z0 @1 R求大神解答啊 |