我编的程序如下turtles-own [energy]
! ]; y6 Z8 q6 jto setup
- q4 }/ U1 D9 d5 s4 j3 V clear-all
& u& b! [5 X( e setup-patches v) h% A: j4 m- ]
create-turtles 100
* w$ g! O" o6 N! R" v! ^2 n7 o do-plots
# I4 _5 J1 ?$ C( x" X S" n ask turtles [ setxy random-xcor random-ycor ]
% ]! J, Y l* e; cend
' w! C3 m& Z; a: ?. f% o! W% Q8 c, [to go
8 h" r/ a" p& N& o& P5 e move-turtles5 }+ Y" W) Y0 U3 N; ?+ L
eat-grass5 m9 [. i$ p! _* ^; ^/ \% q
reproduce* s+ p* N T* O, a$ s# G" ]+ I
check-death
' f4 ^" g! I! e# L: p$ k6 g& W$ ] regrow-grass
( i/ |% ^6 `& M0 y" q do-plots9 e) w- u: U- X! `" S
end
/ g5 w) x/ h8 {( k8 ~/ C) }/ k1 _to move-turtles" |8 s" c# t- k2 `% |
ask turtles [
- d2 X: \( K z; X% D right random 360
5 m9 @# j2 T# t( U8 V forward 1$ m) h4 J6 J/ A. G8 z6 K! ~2 ^
set energy energy - 1. Q0 X4 V8 U* Q6 V1 ] g5 z
]
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to setup-patches
# ^4 A# u6 y. H- I0 R+ S* h ask patches [ set pcolor green ]
/ E' F4 _# a% n; J0 U, K+ Kend
0 o9 P# n' w: W5 h* wto setup-turtles
. C" B* ^* v3 s" R4 O; N create-turtles 1007 V6 b! ~: S8 ], l% q
ask turtles [ setxy random-xcor random-ycor ]9 ^4 G. o; e' k) h
end. ^/ e5 W, @# j7 o/ K' M9 \) a
to eat-grass6 E' S( d% o8 c3 v q% D
ask turtles [ V) z; W4 p" q& N
if pcolor = green [
, C* F$ H u+ J- i set pcolor black4 c) L0 }- D. v" Y" h8 a! ]
set energy (energy + 10)/ I3 S. j! m7 O- |
]
" s Y k( {7 N. @, e ifelse show-energy?/ i5 {' H. \8 H/ d1 d& v
[ set label energy ]9 o' {' Z" [- f* H J) G/ _# g3 s
[ set label "" ]( O- v9 m" M) K1 L% u
]9 i7 z7 _* u7 I4 d$ t
end! Y3 }- s. W" ~4 o' `
to reproduce
# l* _' p+ J, @$ s+ j. ?% Q ask turtles [! T. W, u' @; V0 i& Z: k
if energy > 50 [
' X- C8 r4 u# x2 N- B set energy energy - 50
+ z1 j# e; S' t# D/ c( J. D( ~ hatch 1 [ set energy 50 ]9 v$ v! b. @5 { t1 C9 i# F& ^
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end
% w3 ~# z" O. u. Uto check-death' A; D* s) ^" J% H& F8 h, C
ask turtles [
/ | e# n5 T7 F. X if energy <= 0 [ die ]
. r+ q6 e; [/ A ]
% q3 \- h3 K* `* [: z! ^ g+ lend
h3 { f) [+ p1 tto regrow-grass
; J3 y+ b9 p: B) A6 p, U ask patches [
# V7 ^: G* c4 D7 _- _) t% i if random 100 < 3 [ set pcolor green ] v$ h" H0 K/ o9 M: ] I
]- V0 l: I3 U% @$ L
end1 ~& }+ I$ Q/ O6 k- k
to do-plots p/ n0 R& o# ]1 d: ]
set-current-plot "Totals"
3 n- I* Q, w8 M/ ^0 y set-current-plot-pen "turtles"
& K% r0 y+ [6 V8 Z4 K7 v. ` plot count turtles
" n# z' A- l4 r0 M% o set-current-plot-pen "grass"7 ?+ T+ t/ s/ P
plot count patches with [pcolor = green]' ?9 q. O5 H; o
end' s3 {. w# n* g! T! I0 q0 [ l3 `
可是运行时提示no such plot: "Totals"- {: s! S' N1 w; b0 P1 G
error while observer running SET-CURRENT-PLOT7 W7 J4 `5 j& K2 x/ b8 w8 l
called by procedure DO-PLOTS3 w' j! | ^6 K% V
called by procedure SETUP ?3 [6 \; W4 q9 H. I7 J
called by 按钮 'setup'0 C4 {' V3 i1 s' j9 k- R& @9 l
求大神解答啊 |