我编的程序如下turtles-own [energy]
# |* s: \% Y& F: }# _, kto setup+ f, x% C# {$ }
clear-all) l& q8 ~* o2 ~3 |2 w/ M
setup-patches
' v( U+ C$ ^& T2 \, X' j. Y create-turtles 100; U2 P* R! o) d* _2 u' r2 N% n
do-plots" R9 p, c x1 n. p
ask turtles [ setxy random-xcor random-ycor ]# ?# _6 m8 ~3 o3 K2 B
end
, Z! [ l/ F) U4 Uto go% h, x: U9 j( I# K0 `; S
move-turtles
$ x3 L1 a2 S; ?; x2 a eat-grass
+ W( c* }$ s& }8 @0 q reproduce
3 V6 b# s7 z; C, f, I check-death- l5 M5 [8 T" p$ ]( E W, q2 v: s
regrow-grass1 ?( w! ~: F2 b2 v2 y( A
do-plots6 }. Q& n0 `' m3 ?1 q
end* e' q- P# H1 h+ M
to move-turtles- H! g6 |' S5 P1 K; Q
ask turtles [9 n5 K8 z' r3 Z6 N- Y& G
right random 360
3 P' W# v) p7 B forward 1+ n' A7 @# M5 K3 V$ z1 Y& O( N
set energy energy - 1
* g5 T5 H4 I! `& w& P7 Q% h9 t ]9 F2 m0 m6 K2 O8 i( y6 j
end
6 m& L! m% _9 D- f# l, j3 [to setup-patches
* R7 ]! T2 t1 I ask patches [ set pcolor green ]
& j3 K! \+ K' d% P5 Nend
* a0 P# f" A8 g; [4 R1 Pto setup-turtles
1 v, X4 V1 ?. P, N7 V1 i create-turtles 100
5 B5 \& \6 b% i' q ask turtles [ setxy random-xcor random-ycor ]
# z$ J# v2 d$ Pend
! u4 ]3 R# s2 @& i3 a8 E( _1 f2 u8 G; \to eat-grass
) j+ ?4 e+ {; O* m ask turtles [+ u, k; S b! Z6 }5 p
if pcolor = green [6 L: F" g. G, a; B
set pcolor black
/ N5 p, T' o$ |* }! Z set energy (energy + 10)
1 Z( h; A6 I5 s- C! ]3 I n3 l7 X$ A ]
$ d/ ]. F6 d3 Z; ]/ L% a7 g ifelse show-energy?
; j& h& a, G" G+ j, \0 J [ set label energy ]8 W1 D# N4 i$ F* x
[ set label "" ]8 v% S- s- a+ N; c; k5 i2 z
]
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to reproduce
, z: T8 h. L- |3 U/ E/ T: Y ask turtles [$ q9 u. ~: q$ }! Q
if energy > 50 [
) T& N& P- T. n set energy energy - 50
, v$ M# f/ X3 e hatch 1 [ set energy 50 ]0 x6 [$ I, E3 h
]
6 ^9 G* k5 A) K0 x, s% A0 y. S+ y9 q ]/ \7 B9 P4 U$ ^3 d% w
end$ k x- h9 t9 y$ v% {, I* @
to check-death9 V" D0 s# k" Y, a$ ^
ask turtles [# ^8 A9 Y" |+ s4 g6 ~
if energy <= 0 [ die ]1 M+ K8 b6 S/ g5 y: c3 @
]! Z8 W# ~ A7 N9 K( G
end7 U& ]7 U3 |- l, A" c* G, Y' S f
to regrow-grass
" |3 S$ {" N4 d7 W! A ask patches [0 K7 {3 [4 u# x7 V6 n
if random 100 < 3 [ set pcolor green ]) i3 u6 B. u/ O9 l8 V
]0 }# H G9 s/ G* q& b! v
end
. V$ J2 l- P- ?! ?to do-plots7 \+ ]4 R5 O- R0 B: }% J1 n# o @
set-current-plot "Totals"2 [5 I, V3 u" }* I% ^2 [
set-current-plot-pen "turtles"
6 a1 v/ D# o" s& o4 n plot count turtles
6 s: n( f: @. } set-current-plot-pen "grass"; l" |) w( u* b) @8 B* M
plot count patches with [pcolor = green]
3 h0 }0 m7 s$ Z- _4 `2 O8 G( F& bend( B7 d k6 V- ]# y
可是运行时提示no such plot: "Totals"
; r6 ^ S" E& X2 m) serror while observer running SET-CURRENT-PLOT
, P) ~/ s( u+ F4 z6 G8 q& c called by procedure DO-PLOTS- f. x2 A# g5 _1 X3 D3 M
called by procedure SETUP& l) W1 V% p+ G1 L/ V/ D* @# K0 `
called by 按钮 'setup'2 R0 `; ]* ~& ?: Q! L) A
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
