我编的程序如下turtles-own [energy]1 S. l2 h2 a. G2 l# G @
to setup1 L& B6 J1 O9 m3 n$ m% Y# `& Q
clear-all/ T% g; N+ y; p+ G4 e7 K$ V
setup-patches
( D) B7 t6 ^0 y" h create-turtles 100
: G% H3 l: I' O; H do-plots
) j. o& e& i3 T) F* e* T. e& L4 J: K' [ ask turtles [ setxy random-xcor random-ycor ]
* |- |: ?$ ?3 F* |* D" iend
6 ?" J, Y- I/ E6 P; R" E! kto go
% c: M) Z) |, z, G9 ` move-turtles
2 p& M% N* m1 f- t/ O eat-grass/ m" A3 y( L L' N
reproduce7 b0 ]7 d# y* ^
check-death
; _ A1 z- L: N8 c2 ], V" R: ` regrow-grass
o; T- h9 N6 J9 Q* i do-plots' j. w! {6 x( ]' [' v, ?
end3 h: [8 a$ V. o0 Z3 d$ Y4 G: `
to move-turtles
- v# ?1 g! j& Z9 i4 R- }! R! y ask turtles [
j' ~# j5 P/ C- t3 M* }+ s: G right random 360! w+ s* l* B1 [) @
forward 16 t' I9 l! B1 i; z, J3 B( ?: ~
set energy energy - 1( J+ j8 f. [4 P. Q+ H+ a3 M9 \
]5 X( y. a( y3 }5 S. `: B
end
$ x; n u9 [3 x6 x8 h" nto setup-patches
" ^7 F) T; a2 k8 V" e ask patches [ set pcolor green ]
* w! x; b$ p6 ^0 ^: f' [end6 s m0 F7 L1 r- h8 k$ z- u
to setup-turtles# }5 G+ i4 k6 B
create-turtles 1008 |. v+ O Q2 o% l2 R
ask turtles [ setxy random-xcor random-ycor ]
8 M) @4 k" I" l% Uend9 P- o* x) ^ \' }7 F) Q! D: z
to eat-grass5 S2 L. P& R4 P& c7 `) B5 x
ask turtles [
+ O3 L; [1 A* n1 r if pcolor = green [1 c! l1 b) j- x- i, W& @* r
set pcolor black
! |- r1 j" g3 x! E set energy (energy + 10)! I7 b" T5 u0 T0 ?
]
. [) b- j$ Z* z ifelse show-energy?* A& V# {6 z' Q2 Y! i# o
[ set label energy ]3 T$ P! V: I2 A5 A: w: X
[ set label "" ]
C, m2 P6 Z- [/ I. c9 \9 I ] V1 l* h7 f8 O) s0 Y, n; g0 V
end
$ w0 T& G9 ]6 v( S) Jto reproduce0 @$ ?+ O' q* W8 J% O! }8 B
ask turtles [) x8 G/ C% ]5 J! X- F
if energy > 50 [
+ L1 }7 V, [* S. o( a- h2 d# P: p set energy energy - 50, y( @+ @2 g3 N
hatch 1 [ set energy 50 ]
, f+ o9 w) B6 ]8 z1 { ]
$ t+ Z) `0 ?. T& X( B: N) o. Q ]4 A' F4 f/ _; ~. p- @# I3 _
end
" G4 L2 M E/ }4 c, r- yto check-death* L$ @9 u- p) J; i( E( s* N5 d
ask turtles [! \5 L9 }* X9 @! s0 i) n1 x" O/ \
if energy <= 0 [ die ]4 `' H2 c9 Y5 } M) ^
]
' A' h( l! b) Q% c( A& wend I; b+ P# D- s- O
to regrow-grass
" L1 r" E1 {, O% n. z& G5 v ask patches [" V; Q2 G) E! r5 t
if random 100 < 3 [ set pcolor green ]
/ |# [- ]) n9 ] p: S e4 r. U4 ` ]$ n% y! Z( [8 ? T
end# r5 R# {4 z6 M5 \+ [6 H3 q
to do-plots
! M$ h1 f. Q2 d2 _2 r" I V set-current-plot "Totals"# b* T5 D5 ]2 l6 _
set-current-plot-pen "turtles"4 E' c4 F, y. _# L
plot count turtles7 S7 @% A6 t0 ^0 u6 s* e
set-current-plot-pen "grass", x4 s9 @ `9 E3 y
plot count patches with [pcolor = green]
$ ]1 M# D5 ?% G) S) f# A1 Rend
9 n9 J, S3 ]& B5 |8 W' z! [可是运行时提示no such plot: "Totals"
A" M# Q; d7 I2 berror while observer running SET-CURRENT-PLOT) g# A0 _, u4 B' q2 ?
called by procedure DO-PLOTS
$ x8 e* c0 m: f, z called by procedure SETUP2 Z4 m/ J/ V/ _" n9 m
called by 按钮 'setup'
! z2 S5 g$ g/ L7 h求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
