我编的程序如下turtles-own [energy]# f: t! B1 j- ~, Y1 w5 L9 h+ x
to setup
6 l% e1 d9 r& F+ M! @; L clear-all o) {4 S+ O3 E$ P+ {. O/ X
setup-patches9 Q4 _: }, R! I6 v9 w
create-turtles 100* {7 ~8 D# M% I4 T
do-plots4 O, G/ l+ ~# f0 y: u% U5 f4 N) R
ask turtles [ setxy random-xcor random-ycor ]
* q- O+ D9 B0 qend& P* t( C7 B% x8 e/ n8 [
to go
$ `0 C i# j5 A. H P move-turtles
( J8 T0 x0 G5 P, v' J' d eat-grass: N e: R" k- I+ c
reproduce+ p' G: f+ A6 L: R$ g2 _4 B
check-death
, i3 ~0 o5 b* v/ G% N- j+ V regrow-grass
1 x j5 s b$ z& \1 E9 Q3 e do-plots5 j# x7 m& r6 O5 P
end7 b8 L/ D4 U# _6 b! A
to move-turtles
( r# ?/ f* _! f$ c# x8 W/ M" @ ask turtles [
& }; R- g: L& U8 j+ P7 x3 g right random 360/ K2 ^2 Y; n- E7 Q% T& Q
forward 13 V% e. y w+ O9 F8 Y& w
set energy energy - 1$ O0 u+ N' h5 Z6 ~
]4 p8 c% @2 @5 N1 }+ \2 j
end
0 H" @2 W2 J4 n& Oto setup-patches
2 q6 z. z; f9 z/ @ ask patches [ set pcolor green ]5 @ X7 h) @: F3 \* s q5 n
end
8 T( r K8 B0 b/ I Zto setup-turtles
# L( v- w5 r) i create-turtles 100
6 w- `1 I# `0 a3 Y ask turtles [ setxy random-xcor random-ycor ]
1 k, ~$ I# J$ Vend" w( v2 n- ]# g
to eat-grass f& r. F% l6 K7 C
ask turtles [
* x o3 w4 q+ t* v" Q if pcolor = green [
4 E+ C" H$ S& Y& \' ^ set pcolor black
- z0 }* F4 K& q& ?6 j5 h) U! l set energy (energy + 10)
( p* Q) r; }$ b) x; ? ]: C3 y* C J1 X: D f% g! B
ifelse show-energy?
. J$ s3 Q! V! b4 o5 K( _ [ set label energy ], l) J* v' Q3 N+ r5 e. ^; {' p
[ set label "" ]
a a" C, l+ B ]
3 \7 u1 Q/ O0 y8 r' }end
$ x# d; ?& ?5 kto reproduce
- M$ x2 @9 A% p) n8 n7 E( z ask turtles [. n4 p7 p" k% X* e: l, i9 e8 c
if energy > 50 [) K7 [7 [0 L; C/ ]; c* d' j
set energy energy - 50# }0 O M" E7 k( }+ ]+ V
hatch 1 [ set energy 50 ]
0 _" Z% _3 @% X: M, Y0 L4 j: p ]
: S E+ d E+ b" Y" ? ]$ w* V7 S* `1 |1 p4 y1 x# K! r* D
end
" x: [, {4 ~" A& a; qto check-death
3 _1 T/ t6 Y' M9 B) m; Z7 W) q! } ask turtles [3 S( y' O; K- B4 o. s
if energy <= 0 [ die ]
- n4 u/ z% j7 ?* b ]
" c8 b! v* l7 @' \+ Jend
. \+ z. I3 `+ S( w# i2 hto regrow-grass6 I3 ]9 C# J! r5 O/ p
ask patches [, T" S4 Z* }9 Q% p
if random 100 < 3 [ set pcolor green ]
4 L6 g6 |/ i' h; H+ l( b ]
( {9 \: I4 v2 {0 L4 U2 vend5 m" E% f4 X9 k) Z& [/ s% ~8 Y
to do-plots6 O# X6 ^! u( }
set-current-plot "Totals"7 s9 e& N% {8 n7 }
set-current-plot-pen "turtles"
: G. V/ F2 x, @, Q plot count turtles# G8 F: _' d+ | g
set-current-plot-pen "grass"
' u. A& ^: j. U% S plot count patches with [pcolor = green]
+ g2 E! a, I8 a* z' cend
" _: l! {. e* F+ _; | M! e6 Q* [0 y可是运行时提示no such plot: "Totals" C1 O( n3 l/ b9 e
error while observer running SET-CURRENT-PLOT9 r0 o) x* N+ W: g8 \* v
called by procedure DO-PLOTS
+ S: S" n9 Y! m9 O4 j( N called by procedure SETUP
( T; {" @( j& z* {; u' t* V called by 按钮 'setup'
; B% ]5 V: a4 W0 ?求大神解答啊 |