我编的程序如下turtles-own [energy]
) G; }1 i7 E$ Z0 ?1 xto setup
% M. w" Q$ C% @) [7 N5 u% y clear-all
8 t7 I$ e9 x4 v2 a' k setup-patches
/ {/ [; x, S- U. }: L$ Z create-turtles 1006 p" J7 U' I; m0 O& n; [7 M8 t4 C
do-plots6 d: G3 v; G0 Q g. o5 ~) P4 o2 J$ @
ask turtles [ setxy random-xcor random-ycor ]6 [+ M; H$ y7 Y$ u! Q
end4 @8 F, i z% p5 Q5 e
to go) W' o' [* q, {1 j' D9 l. R8 L V
move-turtles
& J8 X: R; i7 J3 Y. y* g4 d9 M eat-grass
' C0 m; [9 H0 G& f reproduce
/ o( z5 |) }2 u1 j' x5 H0 f% g4 j- C check-death7 V' `" T) g8 T) P- p& i# Z* e
regrow-grass; P5 f. G. _0 t
do-plots
/ o+ e% D/ P7 w$ j9 Z% k8 send
6 s. ^) ]3 U. |to move-turtles
3 M" X9 ]* m, b2 e! Z ask turtles [+ ~! R; B7 K$ z2 Z3 ^
right random 360
; c" J* c8 ^5 D3 { forward 1
7 _' W& e2 c( v set energy energy - 1
7 e2 h; M, t+ G. C# w9 F ]
- |3 h' v/ U- {* Gend
7 r R9 K: W: hto setup-patches
t% E9 ^# }- l: i1 o1 y6 D/ [ ask patches [ set pcolor green ]( h2 b/ {9 s" i5 w( R# C9 \1 u8 o
end# I; C6 t9 \) X; H: n, [+ w
to setup-turtles- {# T6 f' O# Q. U9 v5 R" F6 D
create-turtles 100
/ ^. U$ h' x, ?5 i# U! s; J3 g1 r9 K) w ask turtles [ setxy random-xcor random-ycor ]: s) O2 q! y0 } Q3 a2 j$ I$ M) j
end6 o- P" t. ]$ n! p" [
to eat-grass
# i5 Z [% g. _4 w0 [ ask turtles [5 U% x v; u7 j
if pcolor = green [2 x; @, e7 |+ _9 c- K4 u$ v3 ^1 u
set pcolor black2 O- D( l* f( \5 q3 m% T' W
set energy (energy + 10)
4 s5 u V4 I+ S' o) O. O) ?( n+ h* x) [ ]
/ e4 F$ ]$ j$ w! g- h) \9 k ifelse show-energy?
6 d5 @( f5 ~& {6 T7 e! Q( y3 W [ set label energy ]( P( h5 a, h2 N( \5 K
[ set label "" ]
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end
6 W- c" u3 O0 N/ [to reproduce
2 T8 f! y+ @7 u$ {# i ask turtles [
7 Y: g2 |6 }+ ~. l' r, [ if energy > 50 [
$ e7 ^" n8 B! e, I set energy energy - 50
+ f$ G! t E- U hatch 1 [ set energy 50 ]
. w! T- B1 ~: B1 |8 s, W ]! t5 a0 I+ I. W `0 J
]
% T. i3 h( r# }* ]8 |3 R) Dend) ^ [: k; w, b6 ?7 H
to check-death
/ M- G- ~6 O: ?* \- h3 t7 N2 | ask turtles [
: x* Q' Y1 a. L+ Z if energy <= 0 [ die ]
7 y1 n* H9 L. q4 F1 T' r2 } ]
( V' } }5 P+ U: k4 |/ ~end- b0 X2 E) X, [8 E0 o U" U
to regrow-grass
3 a, o, ]9 u/ Q" ~ ask patches [
* \0 `# p2 Y- c8 I; L$ A- t if random 100 < 3 [ set pcolor green ]5 y2 n$ I: \* y" |0 g
]
6 Z8 |7 Z8 h& R! xend
, Q V9 I- a4 L8 ^0 v6 Qto do-plots
2 k3 [9 O4 O) h set-current-plot "Totals"
4 `- e+ Y: Z9 h0 k5 d/ Q set-current-plot-pen "turtles"
1 a! ~1 F( F9 b8 ?( i, A plot count turtles! v6 ?5 S3 e3 L, u" b- ?: ?
set-current-plot-pen "grass"
4 `0 e; ~# L- _4 |0 _6 R# i plot count patches with [pcolor = green]- E; Q4 @" U& f6 g
end
! ~0 _! R/ N& ~; f @ V6 r可是运行时提示no such plot: "Totals"
3 S# t* u" q& E8 p' Yerror while observer running SET-CURRENT-PLOT
% F) l8 A0 z9 I+ B& a called by procedure DO-PLOTS/ o G" ]2 A, H. x0 _
called by procedure SETUP! J& Q8 y3 N" U6 V0 W1 E" ^" h! c( ?
called by 按钮 'setup'
9 f% i" L6 J: A8 P求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
