我编的程序如下turtles-own [energy]
! V3 ]% g: @) k& \; h* rto setup& _5 \/ z- F% Q2 w$ C- e
clear-all+ N5 ~+ x7 V4 C- M$ \) J
setup-patches$ m B/ O, J* ]) J0 R# C
create-turtles 100. F% c: Q1 f1 a, S0 G/ w! V
do-plots" y( P- B+ L1 ?8 ?
ask turtles [ setxy random-xcor random-ycor ]1 l! Z8 Z( B: M$ o% C( O
end# n: ~; i0 w; d* ~$ U
to go
8 s' E; T4 I$ M. F- p move-turtles
2 [' h$ X" Q8 }& H7 g4 b1 m* v eat-grass
, U/ Y9 Q, M8 k6 A* v1 ?2 E$ x reproduce+ |' w$ P% S _( b8 \+ p
check-death
7 y; ?! }- H+ o' @( J+ ?! \ regrow-grass
; H! A4 w3 [7 q do-plots
# J! F3 p# u0 ~1 t4 Wend
( n; a" M" }8 Y- q0 ?5 cto move-turtles$ R; [8 t/ S0 R+ d+ S* q
ask turtles [5 K0 _. f# l3 \$ Y+ c* N/ p
right random 360, }2 C* ?8 ?( p/ ]" w9 I
forward 1% a% S7 B* a( Q; J
set energy energy - 1
* }6 _: a2 T; S, S2 J K0 K+ J( m ]
! f9 \ _0 D5 E% F9 _6 J3 j8 _end
# |2 F; G! C" S9 nto setup-patches
+ p1 e) u& ]5 E8 e0 m% h' e ask patches [ set pcolor green ]
' M8 n. e# I9 tend
9 V W9 L, ~+ P @" c2 t3 F4 d6 Uto setup-turtles! w3 M6 T( ?* y
create-turtles 100
- M7 l0 J2 j* @0 a ask turtles [ setxy random-xcor random-ycor ]
) E Y2 N. K5 W5 d- Vend
# _4 ?) i( G" m3 ^5 Rto eat-grass3 y4 I+ w: O' \ C% I0 v
ask turtles [9 q# }, y3 Y! k! i# m* k) a
if pcolor = green [6 ]! _' \: R3 A- B1 F: d
set pcolor black
1 E' Q+ ^7 @4 Q2 R' E" e& k set energy (energy + 10)
0 x& V$ s* j; r& ?1 ? ]
' \% x% K* u6 B6 f4 X" k2 G ifelse show-energy?
& O4 v s4 G. s& K' a( ] [ set label energy ]
. t+ D" y0 v3 H) N" K2 D) [ [ set label "" ]0 E7 N. f' V P9 i+ B
]
6 j+ X e/ t# M1 [) ~end F) V; _, B9 K6 c& S
to reproduce& c4 s' @; l& E! y3 }5 J, s. |
ask turtles [8 I2 |0 {3 N: v9 S
if energy > 50 [$ q2 d4 }4 G2 a/ A$ r& _1 {" C5 P
set energy energy - 50- W) N$ y- b, `& I
hatch 1 [ set energy 50 ]3 Z1 p: ~% t) m3 h! o# t
]' J: {; V9 R7 u
]
# Z3 l* y3 I3 o3 ]end L1 V$ @9 |) E7 p$ Y; p# T: t+ S
to check-death
& @) j. B4 k. G% L, D8 z ask turtles [
$ c' e6 R% _% q# j( j$ N if energy <= 0 [ die ]5 ?, D- L8 Z0 z k4 e) s
]# r3 {; Y* d# R0 v b1 U
end
, ~# v2 g$ H+ G) G5 }. Rto regrow-grass
, I. {- f' n' ^; I( c9 b4 d ask patches [" {& s0 U% g9 T, j
if random 100 < 3 [ set pcolor green ] \% P V0 e( R" C/ e8 x
]
s: f( t5 ?5 b- e# P! b6 i {end
! C+ _9 h* g+ Cto do-plots9 y9 O5 r1 |) L1 d: Y
set-current-plot "Totals", R) k+ ]5 K4 L+ W
set-current-plot-pen "turtles", D# Z. _/ }, a+ J( k
plot count turtles9 n& v& w' @1 C2 ^
set-current-plot-pen "grass"6 E0 w% w0 d8 C& L" ]) I& R1 e: O
plot count patches with [pcolor = green]7 \" H: Z7 L& ]1 c x" ?
end
& W- G! p0 k. b# W6 d可是运行时提示no such plot: "Totals": `; z: ]2 ~* l( P/ c
error while observer running SET-CURRENT-PLOT" t- I2 A1 z! |2 ?
called by procedure DO-PLOTS+ i7 L4 h6 L, |: S' X
called by procedure SETUP
8 k9 c) i; l8 U6 I; `' ` called by 按钮 'setup'+ e1 R. ?4 \+ P( ~9 e+ _- `9 c
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
