我编的程序如下turtles-own [energy]
3 R. z! O5 v2 q7 `4 Tto setup, }5 H3 ~' v/ c) u
clear-all
% g. l+ k5 L3 Y' ^ setup-patches5 I9 Q1 Z! \6 U6 ]
create-turtles 100
0 C! a! A# T4 J) \ do-plots
) R3 P# l+ I/ B1 A! q; P$ C ask turtles [ setxy random-xcor random-ycor ]
0 @3 V0 n! ?% P* lend
% C O. d& N, J- nto go& \8 }& m: U/ T4 e# [* [# a
move-turtles! Y2 {4 i7 E$ t9 Y6 r6 P) C
eat-grass0 ?" V: `+ X/ X% h
reproduce* f- j1 R3 Z# @; A
check-death
" K R X3 `/ y" g5 ~ regrow-grass
/ S9 c; d8 U2 J, S" P3 e do-plots
\ K; u- l" F- C( l; e8 d/ @2 x4 `end
. I3 h; U' h( S B' z; Bto move-turtles9 J. R8 e. F6 o8 s$ H
ask turtles [
% A U: J. P) J2 L3 T7 t right random 3603 O+ C& r) }8 ]9 ]
forward 1
3 c& u1 U9 M3 ]2 c( A. X: Z8 y" P set energy energy - 1
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end
: I e% C2 ^' b8 O uto setup-patches; P. F6 u; r1 B( d1 \
ask patches [ set pcolor green ]
( Z6 Q7 R6 {. \+ A6 P4 Z# W: y1 Z$ eend( _. P) w6 G4 _0 `# \; U
to setup-turtles
2 j7 m* d% }0 f create-turtles 100
: W* ^3 a/ k+ h8 n9 z ask turtles [ setxy random-xcor random-ycor ]8 C: _" s Q/ ~5 W% i6 K/ B
end
5 c, ^* v2 e/ O% ]( E& uto eat-grass+ ~2 L5 O5 |$ J
ask turtles [
+ l) H4 S- S" ]$ d( [$ ?& G if pcolor = green [$ ^/ a% G+ P1 a9 b) e/ n
set pcolor black: C2 |7 a/ P9 G! P' Z
set energy (energy + 10)! {$ f2 P3 f( x* H3 p
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ifelse show-energy?3 {% K7 y$ u- E, y+ f8 p" i) v1 P
[ set label energy ]& S0 y9 S6 u" @& ^% y3 D
[ set label "" ]
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end
# o- W% _* L( S3 a8 S# s% _to reproduce$ t, Y: s' ?/ }0 m) V5 I3 N: t- w
ask turtles [
9 r( ?4 z5 `9 T. ] if energy > 50 [. a2 f3 Q2 H" _ ?0 [5 h! [
set energy energy - 50+ [1 {: @; I" h! D9 p
hatch 1 [ set energy 50 ]
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% j. {$ }3 C/ c- s& {/ cend' i2 h4 q) P( E1 B% {: _
to check-death
! \9 l6 N* v+ W* W: U/ ` ask turtles [
" E2 G$ O) `# ~* r" q3 O, d* H# e) ` if energy <= 0 [ die ]
3 V! V9 _- `9 B0 f( u ]
6 ?( b9 {0 ~( Z9 i* t! a6 Uend" |/ C2 t1 X& Z$ x
to regrow-grass
" E* E+ |2 J& y: f ask patches [
3 J' _( v5 V& b if random 100 < 3 [ set pcolor green ]6 g3 l4 u3 D) s, R9 _5 ?
]! k7 p) k0 V; M
end& w/ i P! q/ d/ T
to do-plots
1 I0 {! s6 V# q8 P# e% ?+ ]. p9 I set-current-plot "Totals") X/ _7 J) U$ `* b% x6 d1 `( O
set-current-plot-pen "turtles"3 Z+ A }, W' ]% ?7 l9 ]) U
plot count turtles/ H, O7 Y A2 `' a: l, L4 y2 B$ X
set-current-plot-pen "grass"
C$ u8 |* x: c3 Z2 g plot count patches with [pcolor = green]& i3 k2 ?3 U# U! B5 t0 w2 w
end
r( }; g: q% c; @, `& g可是运行时提示no such plot: "Totals"
, B! V d; W3 Ferror while observer running SET-CURRENT-PLOT
( w/ g+ x9 F3 S; c called by procedure DO-PLOTS8 G: h0 S" f8 [( Q( x) V F* q3 R
called by procedure SETUP
# G2 z: v* g0 w4 g m* G& d. z. d5 ^ called by 按钮 'setup'
) Y; O5 k9 H3 e. Z; v0 Q* [求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
