我编的程序如下turtles-own [energy]! u# }# D, i7 M" N. r2 f5 u
to setup; P7 Q/ E/ i( R* N9 u2 e
clear-all& u. n$ [4 ^# S6 ]
setup-patches
+ J; q0 \( N7 ~2 i5 P create-turtles 100$ r2 \, o0 y: ?5 x+ O
do-plots
. \; l/ P6 l* \( O9 C ask turtles [ setxy random-xcor random-ycor ]2 L0 o1 l) i6 J& P) }4 Y* |
end
* \, U5 ^6 z9 m0 B. N' u2 Jto go! `6 }* w+ \9 A8 V' ]
move-turtles
% @$ j. d3 w; Y( B' g e: k7 ^' R7 _ eat-grass
! @: [- ]8 w! ]' O) q; u$ s reproduce
) b! x6 K7 M6 M# \8 _ check-death
6 s F S b( j* l0 u( u7 r regrow-grass2 K* a, k& t- Q) F5 c
do-plots
9 {6 ^8 T% \& a2 D6 E2 {end
6 h) A$ I& L- I! B [to move-turtles6 v4 P9 k8 r7 E
ask turtles [
( r4 q) u7 ~! T# s0 z3 | right random 360
E8 t- w/ r# [# }; P forward 1
: Z3 F- J. k* {7 c4 n set energy energy - 19 J1 i4 V y$ Z5 d8 @
]& a% s" T& }" `# M
end
& _- I( Y8 Q6 `2 e+ O/ |' Fto setup-patches
/ K+ l- |; Y; \ ask patches [ set pcolor green ]
( c* T$ Z7 n3 n5 n1 v. Zend
' u# n# j+ ~: [) v0 D$ ?! ]( C* N6 Nto setup-turtles& a5 c5 X! l9 M. r' f
create-turtles 100
" n9 {2 k! f: S- ~" K% V ask turtles [ setxy random-xcor random-ycor ]9 H$ H- E+ r; n. ]9 |/ r( u5 E; y5 f
end
' p: y0 r8 d9 P. e5 L0 d: I* fto eat-grass
4 o! X: P) A% [. k" t0 d, {; {+ M& C ask turtles [9 g. A# M: O8 x3 P6 c& D2 S
if pcolor = green [
! y9 e: S Y) x) @9 D% ]; c v- P# O set pcolor black
, e U( v: H' k- S8 H- s& q3 _ set energy (energy + 10)
3 n5 z5 G: L* o' b T$ J ]
5 W! z3 s' H7 p7 e$ l2 n: Y% a* m ifelse show-energy?4 a H, y- [& V0 P) ?2 J4 _
[ set label energy ]
3 W2 @# E% b. ` [ set label "" ]
8 l4 W3 m2 n( M/ l' R, z% g ]% V: C; f, K; Y
end+ u! _* M, n3 L, B) [2 I
to reproduce
: x" }! S! |4 A8 n T' A4 X% ] ask turtles [- t# u4 t( ]3 S2 s- Q
if energy > 50 [ E5 r, T6 q2 A8 {" m; k# t$ C
set energy energy - 505 d/ S. w9 h% ^7 k
hatch 1 [ set energy 50 ]7 O8 x) f) J9 s5 \5 D
]
9 P3 W' _) m, g3 @5 [: u% Y ]
u* p f# U& ] }, Kend3 ~9 n" x3 y5 Y
to check-death9 r" f- @( k. G" ~8 Y! L5 {' _ `
ask turtles [
* K: H; |; p) Q' | if energy <= 0 [ die ]
+ M5 `0 H- Y* W ]
$ w; a) W; i! Y" z: Tend
' W6 P" {5 _" y4 O& N& Sto regrow-grass
/ p3 j/ {$ W: @2 I) S ask patches [
: q+ b' y4 Z. ~4 A- F if random 100 < 3 [ set pcolor green ]* }, _9 Q) K! v7 ?# w* E
]
9 \! @ D1 m. xend' o& R4 P( ?* T
to do-plots
" l- E) {: d5 i' g. p5 Y1 _, Q set-current-plot "Totals"/ `( |# W8 U& {/ f
set-current-plot-pen "turtles"
1 D; e$ p) h4 M! {2 o6 Z" e plot count turtles& j7 O9 e3 c+ z
set-current-plot-pen "grass"
' w- U! L( d# T: ] plot count patches with [pcolor = green]
# N" ^+ o @/ D) jend" g) M5 S: _( V8 G q
可是运行时提示no such plot: "Totals"
0 O0 J: O4 J, ]* X$ x3 Merror while observer running SET-CURRENT-PLOT3 I9 Q" f' ~8 T( B# V$ e. B% A
called by procedure DO-PLOTS" T$ ~. Q# Z+ I
called by procedure SETUP
: q% @6 B, `. `/ v$ ?: z9 i z called by 按钮 'setup'! N/ }) ?% T! ^$ j( |% s4 q# \5 y* v
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
