我编的程序如下turtles-own [energy]- x! p3 y V M! x+ ~" u/ t
to setup- d2 F3 C- V" d) k2 q! v4 y; U
clear-all, f, n$ [" b, U
setup-patches
8 t+ n% E8 S: y( J% [ create-turtles 100
. ^9 \1 q' n5 @7 i do-plots
( j% Q& n7 y( ]# s ask turtles [ setxy random-xcor random-ycor ]9 A9 Q8 [$ q, |1 I
end
) |* {) C" b: q+ ?6 tto go
1 H# g& K! @# O3 \/ j7 j' `& I move-turtles0 k: F# a+ R# M
eat-grass% A; y& y7 }4 b1 o7 S8 p- B7 d( C
reproduce6 h& j1 A5 o3 w) C
check-death
& K3 W% p8 t' K" [: v regrow-grass* }% A: L" _1 c3 K# p9 ~. H
do-plots5 R2 l5 \1 }& j! B8 @ h, l
end/ Z- g; S- r* w6 J! `' b2 E! Y
to move-turtles
8 R( a( q ?3 W! z ask turtles [2 o E. M/ j2 p$ A: X4 b3 W! H I
right random 360
6 ~6 h5 w0 J" K3 s forward 1
2 H6 @* N; `( M$ n set energy energy - 1
$ [& e* u/ y1 }: C% G ]$ V B! v2 l& X R& \- I6 d
end u+ K r- c% ]# L7 p; q
to setup-patches
& C8 h7 @- g/ o1 T; ~4 h$ T" Q ask patches [ set pcolor green ]; c. ?- P2 c, w
end3 w. ]2 i, N) f0 W9 m* \5 i$ V
to setup-turtles0 s5 |/ t# B7 _
create-turtles 100$ r) g* q" u9 Q, H* u2 g! {
ask turtles [ setxy random-xcor random-ycor ]
4 i2 [1 k1 h. P( h# @: _end& u% V/ c! E% M6 a) X* U
to eat-grass8 m& J$ m/ P( x! T6 V! y; A- N3 g
ask turtles [
! T+ k" }8 |; [6 e if pcolor = green [; ?0 ?* Z6 {7 D* L M9 ?% ?
set pcolor black
, @5 y0 _9 V9 ^/ S$ N set energy (energy + 10)! M" H! `0 ]; x: Z$ h! F( a
]$ s1 C* Q" L! K. ]. r4 y
ifelse show-energy?
' S" z0 U; F, A% z- J$ a1 }% X% D [ set label energy ]2 V( @7 a9 e6 H( T! h7 L
[ set label "" ]# q6 o" Q1 }4 o) z
]
) f6 A! H; P; }! H1 I8 @end
: n2 O U' f$ \! Pto reproduce2 e; y8 X7 H( _3 a+ [
ask turtles [
/ u; J8 t/ B( D- f if energy > 50 [& r8 R+ e2 ?4 @4 U: A
set energy energy - 50
' `1 T) j K \1 D0 [ hatch 1 [ set energy 50 ]# ~3 x/ `& B7 N& s( K* p, J G
]* k% W! K; q1 I1 M" V
]2 X' G1 C& j4 F* e
end
$ B0 w% D4 c# C0 F: lto check-death
) b) ^6 {) F+ @2 U ask turtles [
0 A$ {/ [7 H3 q if energy <= 0 [ die ]! S$ j% k6 @8 R( m m( x
]
7 k" v& m+ p0 g4 y. n4 L$ send
4 Y3 C% @+ L% Q7 Y3 _* B+ ]2 _to regrow-grass6 k4 j( M4 _9 [" {" U. e
ask patches [
$ j- m" u R, t- u/ N if random 100 < 3 [ set pcolor green ]
% E) j: ?+ P7 k- M$ F. W$ [, M ]
' ~( f$ v- X) X1 P, A$ [5 S' n5 iend
' r- s/ G f) \to do-plots
* T2 F6 a; ~; ^; u% y( g set-current-plot "Totals"
& w, [: m1 J3 B4 ^$ g2 } set-current-plot-pen "turtles") X" N) w: E! Q1 f- i4 O( |
plot count turtles
3 n' ^+ V3 ~3 x+ { set-current-plot-pen "grass"+ Y4 w7 u$ S; n$ f
plot count patches with [pcolor = green]8 r5 {9 U( o* E+ s" W/ X j! ~
end
( H5 n! i2 W H+ Y$ Y5 M: U可是运行时提示no such plot: "Totals"
9 E6 M0 j: {; Derror while observer running SET-CURRENT-PLOT
) }- _8 w0 k$ ^$ V/ | K called by procedure DO-PLOTS4 l8 s9 X1 D0 V B6 M6 ?& }
called by procedure SETUP) s. o" N; V& \( e* [7 e" `( m
called by 按钮 'setup'
2 \% P, p( \) _& r+ a& d$ [求大神解答啊 |