我编的程序如下turtles-own [energy]
7 C; T2 H4 D* Q( Mto setup+ J. L6 H2 e+ C
clear-all
/ N' L9 C/ e. [* q+ G) j/ r setup-patches
7 l5 P# c7 Z& [7 u create-turtles 100* I0 Q- _( i9 u% N
do-plots4 d" m1 d6 M! b4 Q& c
ask turtles [ setxy random-xcor random-ycor ]
. b2 K- k$ O; }$ N2 k) Z# z& [end
1 `! [+ Y& k( A/ ^) Gto go
6 E$ Y+ d4 W: B5 F: l H. i move-turtles0 t9 t& [' u# A5 _2 i
eat-grass
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check-death: j$ o; h- k. c6 B( c8 `+ T
regrow-grass9 U( A1 ^. Q0 y! d9 h
do-plots
) O9 x9 I( w7 v. A0 ~0 B4 Nend
' S5 ]0 G h0 M3 C, D. x7 r! @to move-turtles7 ^2 [2 W' a( |7 _* B T8 x+ k
ask turtles [
) q2 I8 i4 d* K* x% P' j& T, T right random 360
0 e$ k3 {' J( }5 j h2 w0 F! ^# ^ forward 1) S' S- M8 `& a5 @4 s& [
set energy energy - 1+ M: m* A* K+ }* q1 v/ a6 B, }
]
. @4 N( V% e- eend
3 n g p3 G2 j) Eto setup-patches- X$ O, a, l1 E$ o; z( n
ask patches [ set pcolor green ]. k& i- e r: ^8 ^: a4 M; y8 b# }
end E$ e ^3 t x/ }+ I
to setup-turtles6 E( Z$ Y5 \; b7 e4 z; g" J
create-turtles 1007 `" C5 z$ L; Z! V# v4 h
ask turtles [ setxy random-xcor random-ycor ]
* r' N# H4 D5 b% c$ q0 {end1 q& d$ }" ]& ^" C: p1 z
to eat-grass$ i3 o' K4 v# H7 e) G+ z
ask turtles [4 P- Q2 M; u. ^) X
if pcolor = green [
0 _+ d3 f& W+ H& Q- X! p5 f7 ^ set pcolor black
8 u* [0 S% _6 }; i set energy (energy + 10)
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ifelse show-energy?
; d4 f/ A5 D' W$ p3 Y6 G" }9 W [ set label energy ]- D6 `5 {/ c" e% _( R$ _6 m
[ set label "" ]: I. q3 Q; n9 q0 t0 U5 B }9 J
]* H G; _4 Y0 G7 P% y2 m9 B
end' F$ b k- q% s. d, ` u |7 n) |
to reproduce
( y4 j$ {8 x' D4 n; N ask turtles [, i) W4 f* Z& s- E9 k* V7 e- C
if energy > 50 [& i8 p6 y/ ]0 A; |$ P
set energy energy - 505 A" _% V8 Y3 S- g F, c
hatch 1 [ set energy 50 ]
. b3 ~$ A0 f. N ]
7 _0 s2 _2 r# V+ c ]
' e6 |% g& p% s1 B, Jend% d7 i! C3 o1 j$ p9 u6 q
to check-death
7 n7 y/ }1 W/ P+ n ask turtles [* g" V3 j/ h$ N0 ?$ I, X8 q
if energy <= 0 [ die ]4 S) z* }7 ]9 ~0 H5 g9 S
]# B9 U0 z8 `' X, K0 H8 V2 l
end% J& E- _" w. d) Y. U/ V
to regrow-grass7 c: P, Z9 G: [$ W
ask patches [% T: H4 ^$ S) J! P
if random 100 < 3 [ set pcolor green ]
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end
( |7 Q4 r J5 F* L8 ^9 g) tto do-plots. r* U+ Z$ I' o8 |/ y1 i+ q- x% e
set-current-plot "Totals"
# d8 V7 O+ d+ T: \# W) P set-current-plot-pen "turtles"- Y. H3 y, u+ r7 G8 E
plot count turtles3 r* w1 h( D% D% h
set-current-plot-pen "grass"
0 I. H8 t$ N8 E: |) \9 C" y; I plot count patches with [pcolor = green]
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可是运行时提示no such plot: "Totals"
* {: q& J- g# \0 w% Yerror while observer running SET-CURRENT-PLOT1 u8 }1 C9 i0 P6 x& k/ ]
called by procedure DO-PLOTS
: C5 ^/ o) X9 ?7 m called by procedure SETUP
8 N h9 C P2 i- G) E# m: r called by 按钮 'setup'/ {" K* d/ A9 [5 f1 a; W
求大神解答啊 |