我编的程序如下turtles-own [energy], l5 E- O, ~( V/ |
to setup
% E+ I) r- i) A. l clear-all
* t( I9 L* {* ^) a4 H% |4 L setup-patches( Z* K. F3 l z1 g
create-turtles 100- l3 G' b1 h+ ]5 y5 t* w
do-plots
& V3 ~7 j6 {: ~" F6 H" h& W& T ask turtles [ setxy random-xcor random-ycor ]
, D3 ~1 `3 Y8 y. g E" j3 jend
7 A$ M* G6 @/ E: lto go! R: h6 M6 t9 S) U9 G7 F; T
move-turtles
8 h3 E, y# K& v+ a2 c; J& S- V. D eat-grass3 o. q8 O( ^) M7 f! F
reproduce
r- M$ N5 Z2 W% b1 K; u- V check-death0 S. Q# ^; x+ K% m- U2 i
regrow-grass! |) N% V3 R8 ^2 F n
do-plots2 G+ V7 O8 i( k2 V
end
0 G" W9 o6 R' r5 [0 j' p; _0 jto move-turtles: R/ v( ^ B6 n% f- c v
ask turtles [
5 x( A. M" ?! V0 r5 k right random 360) _ N" p) }9 n4 i) g3 K5 |9 m" T: `
forward 1
! y6 I' C+ q- u set energy energy - 18 L5 O. P0 a6 T A4 Q$ O
]
e% I$ M+ @! ^2 `+ P1 m8 yend
% o8 _; f9 L% k0 l: Yto setup-patches
2 y6 f5 p, `* Y0 P8 D! f1 y ask patches [ set pcolor green ]6 z6 [/ o2 C# y- X/ v y
end4 K |" k1 V6 Y- F T$ X
to setup-turtles) C! s$ @2 R+ u* s
create-turtles 100: ]. N n1 ^5 A4 U4 _4 T. f1 V
ask turtles [ setxy random-xcor random-ycor ]* t) P4 J0 i8 I+ S0 T, }8 w, P! n
end, A) K2 c7 \& G) U7 a1 m/ ]- x ?
to eat-grass: ?# d# _' ]4 K7 `& y. N: G
ask turtles [& j* P: H! N- }/ y3 z$ A
if pcolor = green [/ I+ E% o7 U7 E' m% K
set pcolor black1 X3 |$ a0 `. E1 ~4 |: {- U. b- _6 O a
set energy (energy + 10)
# H G& U& g; o4 s1 W: e ]
- _" _8 A1 F+ U1 X) l+ p- @ ifelse show-energy?( _4 f* b/ Y( w" E8 I
[ set label energy ]1 W% B7 w8 P8 Z5 }2 ]4 M% |
[ set label "" ]
* T6 j; b# T) m4 X$ \+ @ ]3 D* x/ D+ y Z. b7 j5 H
end3 I7 z$ v8 M* ]- G
to reproduce
' I2 I% d3 O' Y4 t- V ask turtles [2 D, a4 u0 T6 g) S
if energy > 50 [1 A+ }5 e" e& h/ O9 Q; |3 p. g2 h# h
set energy energy - 505 [/ g) I# m3 q. a) p3 `
hatch 1 [ set energy 50 ]0 @$ J+ O& x- B$ q
] y7 @$ N' Q! `! i
]
$ L' G8 z2 X0 S& Oend
1 M) d! B7 D/ h1 e2 r, Cto check-death% q% }6 [1 T6 Z) a) M
ask turtles [" j' r7 t2 K* T
if energy <= 0 [ die ]
" B6 |; _$ f$ T+ w( A ]3 t7 _% Z4 V) t
end
& O: O" R* H- ]+ U. l ?/ v& r) kto regrow-grass
. c @( G+ ^. F8 G ask patches [* @/ k4 g6 n n; e; t" ~
if random 100 < 3 [ set pcolor green ]
* ?& H! Y ]$ S5 ^6 M8 L ]! T5 r* j; [0 x) W# H0 b# U$ }
end
0 s! D9 B% y6 F/ U4 _' cto do-plots/ U* D1 Z# ^( Z f i4 l: u4 `& n
set-current-plot "Totals"
( e% Q- e% W* @" t+ l% x2 G) \ set-current-plot-pen "turtles"
; T$ l; f: s3 q9 F3 ~# i plot count turtles
6 X/ T% a$ ?- M: x- Y* f: s set-current-plot-pen "grass"0 w; Y. z: s) O3 d
plot count patches with [pcolor = green]
& u$ y6 Q7 E' {end/ [2 ~% e7 [ |* p) ^
可是运行时提示no such plot: "Totals"/ _% W5 D8 L4 ]" r
error while observer running SET-CURRENT-PLOT8 g$ L, v/ E3 |7 L, D9 a( p
called by procedure DO-PLOTS0 C0 }* [7 O. ~; [0 E) X C D
called by procedure SETUP" b% n* L/ ?$ U! c& V
called by 按钮 'setup'
7 z( t2 q9 p Z0 u9 O求大神解答啊 |