我编的程序如下turtles-own [energy]
# T% O S. t2 ]1 L# Oto setup) f/ [- G. w. M; ^- E- [! y
clear-all9 V \- m) |! p) w& J
setup-patches8 e+ k- ^$ X) l1 N. d6 g- \* {
create-turtles 1006 `% ? D) V# S% a4 p
do-plots
- {. Y4 c) a) n4 A8 W ask turtles [ setxy random-xcor random-ycor ]
4 L. J' F' f9 N% D d$ C0 s2 Rend- }+ K3 p3 k0 N$ s
to go
6 h4 J: y; c) t move-turtles
3 F% v$ Q2 R9 j& i) k% Q eat-grass
& z0 \6 f* o; z. o D reproduce
3 |6 [) U) o8 G; \9 F0 x7 P) w check-death
# B$ u% X. y) `+ x regrow-grass
- ~- x/ T/ }2 c$ O1 f3 ` do-plots
3 g9 F! Z' \3 f$ O% l oend) t+ n4 b, y( ~7 W/ W1 Y
to move-turtles/ _5 [, L' y$ F
ask turtles [6 b) Y. W# \: i# x- A$ I+ ]
right random 360
2 q; ?# C) X3 q+ W$ d+ s7 j6 f forward 19 I9 j7 j# |) N1 _$ J3 {. X2 x
set energy energy - 1- x0 T. z! H# ]
]' \" _1 M/ B7 Q" ~7 w
end6 V7 k. _* Y1 R- {
to setup-patches
; N3 b! B( I( a0 _1 @, p+ E ask patches [ set pcolor green ]' w( S& J. i# e) D0 h/ y4 x, ^& u
end
% ]9 |0 c, O ?7 z7 ?to setup-turtles
& T8 }# W! k1 Q4 Q- ? create-turtles 100
" e; A: C3 `; U ask turtles [ setxy random-xcor random-ycor ]6 n5 b. _0 n5 r7 `' n; y [4 G
end: P9 ~- }3 z4 C+ }! I
to eat-grass
; v; d# l8 e$ A ask turtles [+ X0 I: U* ^" Y: S
if pcolor = green [
: ^+ q6 n0 [* |2 ?' _8 k set pcolor black
: d4 F1 O3 g# ?3 D; [4 ?; Y1 H set energy (energy + 10)
1 h, L8 Y% l8 N, W- J( M ]
9 m& R2 y9 v+ V, |/ S- ~ ifelse show-energy?% o' m7 U5 F' a5 w1 A6 a
[ set label energy ]8 Q1 T' u# Z& ^. i
[ set label "" ]8 n& y8 `. L, {' g' ~
]5 `# L' h& i- z
end/ l' W! e# _, a! z1 d
to reproduce+ d4 n9 U/ ]8 e' C8 z
ask turtles [1 e5 G6 e& y9 g% X5 H6 E2 ]
if energy > 50 [' J+ y/ M4 [% I6 \1 L5 S
set energy energy - 50
) C }2 ]& V: J! w% e hatch 1 [ set energy 50 ]8 {6 d2 {9 \: ^
]
; I6 A- [% F& d" [4 o ]
3 U6 W7 r0 f$ x* W' P* Bend
1 k6 u/ l) M+ v7 b( `+ s# {4 K: vto check-death( `6 J: w$ F/ u+ z
ask turtles [
3 l' x) H8 G+ _2 O& d! y7 N if energy <= 0 [ die ]
* P9 L% w% K7 | ]* r i) V3 U- h7 L7 c( }7 ]' M
end" @3 O2 o: @2 s; i: T. n k N
to regrow-grass: K: g8 O3 f, x1 w/ `! H
ask patches [/ x1 I3 e* @# B$ W {0 h
if random 100 < 3 [ set pcolor green ]
, d9 ^) e3 j1 o( e& _, f; b, | ]% c' r3 ?: o: m; e( U
end, R: w! F& o( O9 q Z" N8 H6 j
to do-plots5 O- V- W. Z$ l0 s$ ^! _; C! W- R- w& s
set-current-plot "Totals"
! @0 O$ M7 s/ b* L. L) h set-current-plot-pen "turtles"
; Q4 r: o! ?4 D3 b1 R5 k plot count turtles( s. a, X6 ^4 ^% W5 b
set-current-plot-pen "grass" l) M2 \+ l& n: \0 v
plot count patches with [pcolor = green]
8 I; A5 {$ F% _( H1 Send
- _6 r- \) K- Y可是运行时提示no such plot: "Totals"
3 G$ t* a0 n) o* D9 ]! @error while observer running SET-CURRENT-PLOT1 t. H4 P( x' U0 B5 M5 `* O/ v9 V; `
called by procedure DO-PLOTS; R* P5 I0 R8 c' q
called by procedure SETUP
) y, P u$ k) h called by 按钮 'setup'- E6 x* p5 \* x% s
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
