我编的程序如下turtles-own [energy]' O6 F/ _# |( `) z# [. u1 E3 y2 t( E
to setup- v& w3 f/ x% Z8 h
clear-all' ?8 C! Z/ y5 o. ^; E. G
setup-patches
1 F6 g- V" W% K& C) {4 f0 E& Z create-turtles 100
/ d- H* D- V+ a6 T1 E+ n& P do-plots
, X5 b3 p% W* Z! S0 @& h) y ask turtles [ setxy random-xcor random-ycor ]3 _% u3 F5 ?- b
end
. q4 n3 S# w) Z- u) |2 Oto go1 H/ w- v: C( Z: |" B) ~
move-turtles
$ f- r& v5 E7 g6 D& m3 V+ J eat-grass6 u" b2 V8 ]! {
reproduce5 F" \& m* ^. n$ `) g3 d
check-death2 a) ~3 v8 o; H, Q- K$ P0 J
regrow-grass
/ x- l8 m ^8 |5 j2 j% L do-plots
" N( m# L7 s1 i& s; E( Tend+ ]' A% B6 I+ x' V
to move-turtles
& S8 F2 }4 t% S+ E7 _ ask turtles [ E9 c& G$ W. \' T- a4 C9 D
right random 360
% }/ ~+ N1 S# Q forward 1
# v3 e4 H6 d' y/ X: b U; X set energy energy - 1
$ Z8 \" ^: J7 ~) k1 U V3 Y+ ? ]
3 w/ y9 \7 \" Q3 Z5 X2 n0 Tend
5 E8 S8 i0 N5 m0 m' F3 {" O. lto setup-patches; [+ i% _5 E t( L% \
ask patches [ set pcolor green ]2 B: L+ m6 M% f* q
end
& p g/ P: \/ r9 f9 D5 Y9 `. e) M3 zto setup-turtles
% ]* e! }- M9 B create-turtles 100! P" j }0 i/ ]
ask turtles [ setxy random-xcor random-ycor ]
1 k A0 l/ r0 mend7 T* u" s6 n& H- o! r1 d) M; z
to eat-grass( ]" y" T( I% T# h: C- s/ V. |* n) j
ask turtles [
# M# p2 I! U6 r: N if pcolor = green [( [- k+ W! b' |+ u* E. @4 D! R B( @: t
set pcolor black) C" a5 j# i4 T0 z
set energy (energy + 10)2 F, ^( x# {' G" U
]
8 i# ?+ y P0 h% R ifelse show-energy?
& R; l$ B, c8 _6 w9 } [ set label energy ]% t E& U% b: U3 f G8 J- I
[ set label "" ]
. ^. P5 n/ {/ q ]
& n; `5 K1 I( b Rend
2 _, T4 C+ m4 N/ j4 r8 Kto reproduce; J1 q8 n7 Z4 P" e1 C5 Q
ask turtles [# _* N8 Y! a m! v9 L. S! P: ^* g f _
if energy > 50 [: a5 m. N8 I' [
set energy energy - 50! [6 o; i l9 {2 {- F, m
hatch 1 [ set energy 50 ] m" n0 M9 R; ]& Q/ {. [% a
]
/ r( V* M; I6 ]& q4 _$ {6 k3 c ]
* `+ u8 P2 G2 m- F( yend4 n. c5 E% d! o5 |' u: R
to check-death
# l0 [6 g4 }# T* X1 f1 \ ask turtles [1 j/ E4 l+ A% s& p0 f6 ~3 i
if energy <= 0 [ die ]
8 }* k( o# {. M! V4 Y ]
: z& D$ u9 @+ Zend& K0 a# r5 p/ H( ] A' o2 d( o6 E/ _
to regrow-grass
& h; q3 H$ f; O1 S8 @5 G ask patches [% _, d4 w l9 p$ w7 K
if random 100 < 3 [ set pcolor green ]
, H5 s9 W- o4 Y! g. O$ F ]" A9 s# e% E- O' _0 ]# G
end
* u/ b, {" [: l6 vto do-plots5 G- M1 g" ]6 i7 Q1 `) g+ M+ s
set-current-plot "Totals"" V; M, N. W% A4 B" l5 V p
set-current-plot-pen "turtles"
* n& A1 N4 S# x- Y/ o plot count turtles7 Y8 t) Q) }% {* C) l
set-current-plot-pen "grass"8 A1 K3 T( X9 G7 k+ s9 t1 @
plot count patches with [pcolor = green]
6 Y* Z+ R* |4 ~) Tend3 L2 A9 d/ l! j, r' o& A5 q! e
可是运行时提示no such plot: "Totals"* }1 e/ |/ [9 ~3 g: ?; D8 l* y
error while observer running SET-CURRENT-PLOT, Z1 m4 Q" ?, {8 t x& V/ {
called by procedure DO-PLOTS
/ q# r7 H: h( Y( y/ t called by procedure SETUP1 ?2 I5 v) h' O" e6 s, C3 ]/ ~) b
called by 按钮 'setup'
# ~) Q* K1 }! R& X求大神解答啊 |