我编的程序如下turtles-own [energy]
: r$ S I2 l7 C# X( [to setup
8 }/ D, S! v' W* O8 _% k clear-all1 ?5 R3 L9 J/ I! N* s
setup-patches
: z% s: t% ]( ?$ Z# K, E* E$ k& y3 I0 o create-turtles 1006 ~* ]" |( S5 U G, m
do-plots) Q2 _) T+ B9 v0 G* f: l
ask turtles [ setxy random-xcor random-ycor ]
5 o" w8 U& ?" \end6 Q) P- s8 i0 K. S/ G% \! J& Z4 v4 `
to go
- Z% F( ]( r6 @( K2 a move-turtles
* I5 E3 x2 V) b% f8 z! } eat-grass8 k2 Z7 _; T7 ?7 x2 m
reproduce
" L. e- F: z) `6 S check-death! h" e: n2 z; G5 @# g) m* |- V. W
regrow-grass6 T6 K- T5 x6 I/ @; A+ B) G, D
do-plots
! h# F: W9 ?+ X/ V; ?* T+ M) wend
& Z! g" |" p9 H3 M* ?8 qto move-turtles, p0 \0 W. _ S5 h8 ]
ask turtles [
. V8 M7 `( \+ ^5 Z" k right random 360
: f, K% ]" e; w0 B forward 1! x* f+ X9 x( J. G
set energy energy - 1* |9 T/ k- r ^; c; u# _" k* U
]4 r. x+ ] i6 r* H) |1 ~4 A' Q. f3 A
end4 _: e1 u9 S$ @8 G7 a' J
to setup-patches- ^+ Z9 b( B2 C9 U A5 |" E& r( _
ask patches [ set pcolor green ]6 Z3 y& N9 L1 w5 b
end" `/ [# _( p+ r) z1 T
to setup-turtles
{( o9 X% {; A# X0 I' p/ D create-turtles 1008 X" {' x7 r2 a# m8 l2 y6 `
ask turtles [ setxy random-xcor random-ycor ]
* d9 g) y! D" Y1 L+ J |end/ M. X; z- [; e2 S! |/ }6 }
to eat-grass4 b4 f: x3 R; E7 c
ask turtles [
; a) V% {3 [) W3 ^8 H4 R6 v. i4 `) A5 [ if pcolor = green [
1 v; }1 u6 d U; H2 ~: _/ Q set pcolor black
* O( @! G# @$ Y, ?# w" v7 i set energy (energy + 10)8 H, @1 W3 n5 x" _) a( L8 Q7 |
]
2 A% K6 ~7 L4 _ ifelse show-energy?
+ a9 H9 i8 r2 h3 [. g [ set label energy ]& l8 O0 R8 L2 _/ U
[ set label "" ]2 o" Q! [& @* V( g# H: v1 E
] H% p8 N5 Z# q8 t" |4 E" l
end* z0 H1 A4 n7 O. E5 y! i% j
to reproduce2 m5 k. h/ ~( i* ?+ U/ [
ask turtles [8 U! ]! l& [7 O) }' ]
if energy > 50 [: ^3 ~& z! M' ^ K3 }- {# C+ B
set energy energy - 50
1 W0 L6 R8 M$ k0 K0 a3 D hatch 1 [ set energy 50 ]6 K+ M0 t5 I* H/ [$ b* y
]5 [- M% |: K# ^" b
]
9 S0 c: e0 X( i7 D Qend
$ E$ c0 o8 V% V+ h: B+ Mto check-death# x2 W+ I2 }% d7 l
ask turtles [& v+ L( d; {; D; O( B9 b
if energy <= 0 [ die ]: C7 V0 O8 e, j% T8 F) q6 M
]1 u$ v5 t- B* \
end" u% u" m) `4 U, C0 ^9 _8 ?
to regrow-grass, B r+ b1 t! `$ `' {$ v% ^- L
ask patches [
3 p: B1 p, ^1 w0 ?8 m- l+ X if random 100 < 3 [ set pcolor green ]0 ]; V( r" w E+ o W
]) S2 g: J+ K( }! l
end
) i2 y: P" _' fto do-plots- U& I- @- ~- y- W
set-current-plot "Totals"
6 [1 d7 D" {; _ set-current-plot-pen "turtles", l2 a1 k1 h2 P% ]: q4 }
plot count turtles- x, J( d4 X3 b! l
set-current-plot-pen "grass"
$ b# |3 {3 l0 F" C plot count patches with [pcolor = green]( Y4 \' o2 u/ U8 I2 p
end
) \3 d6 U9 p' @% G* x6 S可是运行时提示no such plot: "Totals"
3 c0 p) w# x* D- g3 perror while observer running SET-CURRENT-PLOT
8 y4 l' C! Q& H8 N called by procedure DO-PLOTS5 G2 Q* G) o0 b+ h5 J+ \7 p, y
called by procedure SETUP
; Q5 ?9 O) I* [4 y called by 按钮 'setup', `; {' F2 l- C* L. [
求大神解答啊 |