我编的程序如下turtles-own [energy]
m; Y. ~- M6 G1 r* g. Q5 Oto setup; t9 _( v/ w$ ^# ]
clear-all
3 ^. g) n( I+ W6 g. O setup-patches& K6 q; F* Z7 {+ }/ U
create-turtles 100* C M3 w5 }4 W/ R8 b+ Z! y+ f
do-plots
2 u' B8 D7 e2 A0 S' q ask turtles [ setxy random-xcor random-ycor ]
! d6 X! K5 o5 v( |end2 Q l3 U; ^0 ^+ K/ o8 f+ T, N
to go/ c; `( F. d4 w) t' c7 R0 C
move-turtles
. j5 Q! h" s: S eat-grass
- c. {+ u1 K. j3 ~! @2 Z reproduce" n6 @8 v, E+ E
check-death4 O' L/ w* W8 a/ \' K- F
regrow-grass% V$ L; F" Z+ N/ M6 w/ W: ~. ~1 z
do-plots7 D1 i/ w, {, X) P& y, |
end% I" `5 F6 a- |3 F- y, d8 F
to move-turtles
1 m; B- S" e$ k7 @+ E) e ask turtles [$ a) ~! s1 s% E
right random 360
8 F) ]3 |7 g. \7 ?( u' } forward 1
* o; U. X. g/ b8 J% E. g) _' ^; s set energy energy - 1
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end
2 ^: J8 n1 I0 W9 Y; _to setup-patches
, b" {# a% y1 k o1 E' f- e* F3 A ask patches [ set pcolor green ]
9 {$ j+ I! S8 s6 G# Yend: [9 ]& f* E% v' `, P$ q
to setup-turtles& y$ f Y S d4 w
create-turtles 100
9 c t8 w3 N% j5 ?. E, P2 S+ d ask turtles [ setxy random-xcor random-ycor ]0 r8 h9 P& [8 o
end5 X1 u! ?& ^5 t5 o1 ?/ n' @ ?
to eat-grass
* g2 O8 d5 ], l; D ask turtles [& r" ?6 l. F- z; u+ v$ [) c
if pcolor = green [
! r) O s- `% ?' y( r7 [4 m. F set pcolor black0 z" C: R' E$ b: l, Y
set energy (energy + 10)
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ifelse show-energy?: J5 m' p$ P) @2 g, u
[ set label energy ]: \8 k, g* r @% d6 z& J
[ set label "" ]
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to reproduce
1 [' P/ l. A4 j- K ask turtles [( I7 [, ]# L$ X. R+ s& |
if energy > 50 [
1 i# V0 e( f& ^; f, A0 p; W set energy energy - 50' F7 v8 R- r7 Z" v: \$ H
hatch 1 [ set energy 50 ]
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]
- q% R. R; ]0 X: cend+ h7 ]! N& y. O( d8 o7 z7 D8 X
to check-death
& X+ F8 g$ {' U" r" |2 g ask turtles [
+ D+ S1 H# X/ I5 {, p% w5 X: P if energy <= 0 [ die ]
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end
% {' M7 r- o2 o" M/ a6 l: a; Ito regrow-grass
0 D# t, I5 J. b) O0 g& o ask patches [( z: J" S: S: L, n1 `; n# @* z; W
if random 100 < 3 [ set pcolor green ]
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' t' @9 J2 g, j# Aend5 h% ] ^- y. b0 b' c- W
to do-plots
7 X0 T% G( R$ K: Z set-current-plot "Totals"1 s' }/ l E% T2 _
set-current-plot-pen "turtles"- x' l3 J6 t! b6 Y5 \1 k# V
plot count turtles! A7 Q5 R: y( {8 o
set-current-plot-pen "grass"
1 ~6 H; K+ O8 v" D& k) ? plot count patches with [pcolor = green]- `: `$ F7 t; Z4 C5 j
end+ R8 Y/ J/ s' L3 C
可是运行时提示no such plot: "Totals"
, f1 M5 Y7 B+ t5 r( Uerror while observer running SET-CURRENT-PLOT
9 d0 e+ }8 J' `. h X+ h called by procedure DO-PLOTS; W. q7 V& I7 v. {
called by procedure SETUP
l9 M" q4 W3 t1 G/ j called by 按钮 'setup'
: f X6 s1 B+ O1 V% D求大神解答啊 |