我编的程序如下turtles-own [energy]* P+ B7 m3 g* H9 a
to setup# t' n1 {- k: y. F0 |" B9 Y
clear-all
) ~" G+ \. H$ l3 P- t$ L setup-patches/ c& S" {% h# `
create-turtles 100
) I7 I+ N B3 J+ o: d( | do-plots
* ~2 L8 F V# M ^- g1 @ ask turtles [ setxy random-xcor random-ycor ]
7 t5 r: S, O& r+ mend+ m2 d \; b" C& x7 S& v9 u
to go
4 C* D- L) x0 v" C move-turtles) s+ N; H. E+ W
eat-grass1 s' N7 z, @, P8 e" F6 J0 h0 ^
reproduce7 ~* s/ x; S; q: T/ E
check-death
9 M) ]7 q+ V$ h5 C; t5 f+ g. S regrow-grass/ \' {+ o/ ^7 s0 [" G
do-plots
0 M* s) G/ {* B- Mend- u6 g! }" G" c* ?5 @
to move-turtles$ b! v; Z4 h/ D
ask turtles [
" ?8 V* u" R" \ right random 360
0 t0 M3 o% Z' y ~; ]) |9 ` M forward 1
% R% Q3 V3 g. t. [# C+ I) k- h set energy energy - 1: c7 E3 Y# O# X3 d* @& }: Q! g
]2 \: ]1 H a+ k5 N$ V! w4 a0 F1 h$ F" p
end
8 z' {. u% ]* g/ [2 qto setup-patches
& L: C" i8 l8 X% h1 U ask patches [ set pcolor green ]
' f; g) m* ~% n* Y5 _# A* Fend
% s- q% }. d4 ~: F6 c) `& N. X5 V( xto setup-turtles
9 p' h* E) e; {5 I+ @9 `/ ~1 d create-turtles 100: s# \, c" \# N! c. {2 f
ask turtles [ setxy random-xcor random-ycor ]
) K* _7 s. i1 j8 X: zend
4 X; }8 g/ A |) v) V$ ^1 ~to eat-grass
5 Y1 M' i0 D4 |' Y ask turtles [ s" D: v, ?0 C* l& R
if pcolor = green [" F7 j; B7 @! \
set pcolor black
) g! ?1 f+ X/ V0 _$ I set energy (energy + 10)4 T, O: i! q P% {9 k8 f
], D' R* j$ N5 | {
ifelse show-energy?
# \$ i) o8 G" Z& }% J [ set label energy ]
8 T# a+ q! d6 E3 U [ set label "" ]
4 }2 \ d8 W6 A ]
2 A; U4 r9 i( R( ]9 q2 l$ s& Pend3 [; {- X4 v X$ c1 @1 ~1 P+ x5 O" j
to reproduce
% e# a- t* _. c( r8 ^- ` ask turtles [0 K9 t6 v! k5 v- ~8 O7 n4 E
if energy > 50 [
6 D% {( h$ Z2 F: z6 E& O set energy energy - 50
' u o& T0 q' Q hatch 1 [ set energy 50 ]. h j3 b# U6 k. J
]6 `9 h' A0 l p* P- c
]' E; ]/ a+ M2 A/ v1 p
end
2 i2 A5 v4 H a4 eto check-death
. D2 P% ~; [8 m. Q- s ask turtles [. Z- [: U: D4 H' m
if energy <= 0 [ die ]5 b# @0 W; c7 T& F1 b
]
) {# [% ]5 V, M* x4 v0 Vend
- _1 P3 g; i, X( e/ f. u1 xto regrow-grass1 \, v. y( M) K% N [1 I
ask patches [6 g( b6 p' E8 d
if random 100 < 3 [ set pcolor green ]5 ~, ?2 w4 y9 k
]
. l/ ?7 C6 T1 y" F, f. H3 Yend8 M$ j/ \* m: _; _' t M5 F- C4 f
to do-plots9 ~2 \5 f3 o3 |" {# m: ^
set-current-plot "Totals"9 H; C- q+ W0 F5 k' \" e
set-current-plot-pen "turtles"
2 R6 u" v, \) g& A plot count turtles
( I# a; c( F* J. F set-current-plot-pen "grass"
' ]# V0 I4 g) B: P% M2 Q0 {( f plot count patches with [pcolor = green]
8 U0 Y; G q v1 L! R% t q4 Gend
2 R6 Z1 D# B7 u$ c. A可是运行时提示no such plot: "Totals"
4 d) o$ N/ A9 ]error while observer running SET-CURRENT-PLOT
: X. ^ c* t7 _( u& L: v called by procedure DO-PLOTS
# D& L$ f; H9 x# V2 C9 d+ f/ N called by procedure SETUP/ z2 V( r( I; z- X5 q0 b9 y2 k# g
called by 按钮 'setup'1 ~; X, g7 S: x1 b6 w( K, a; E! C
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
