我编的程序如下turtles-own [energy]
! q, b/ L9 E/ ]1 m+ ~& g8 T# Sto setup
2 G0 M# ^% s+ G0 ^3 g clear-all+ w2 n" b& ~6 ~* @+ j F3 D' a! k% [" T: U( r
setup-patches
* k& v5 q: P) D. g create-turtles 100
% P% c1 i1 D1 v; C0 X' S" E( d do-plots
% d- J/ _/ u6 z5 G6 w ask turtles [ setxy random-xcor random-ycor ]
+ s7 C2 Z9 d( Oend, o# B6 V, o/ s
to go9 X0 ?9 ]8 s# Y2 g0 T: N5 j
move-turtles4 [8 I; x# q9 Q3 T% I( e
eat-grass
- Z% [) n3 D& E" C# \6 Y reproduce, z/ ^$ V# S- ^; S T: M! l: N) ~
check-death
) v5 U5 x$ {% F% t$ t regrow-grass
! [8 |' W m: y' g3 E# [5 E0 ~- G do-plots
* l+ ~/ C$ {4 w- s' Z9 ^. Qend& u' b2 A5 L7 O6 l* G8 ?1 {/ m
to move-turtles2 u! e/ l- h# p& `3 B2 |# K
ask turtles [1 e& ~: K) w8 M7 l9 q$ N: F
right random 3600 N3 z0 R2 n( D) m$ \; T( O
forward 1
5 L* H6 A" [) A" [( X' Y8 G set energy energy - 1
3 Q3 k' Z! [1 D2 g) L0 \ ]1 x9 j2 j+ R( B0 `, ?$ O, z9 q$ v
end7 g/ Q" N- @, D5 F5 `
to setup-patches6 z$ Q5 V' m- {) I
ask patches [ set pcolor green ]8 a% E, v: M, }+ D% m) D
end
! ~. ?/ Q, e& O* o1 b- Wto setup-turtles. |! \' S* ^, \# [: s
create-turtles 100
9 m- l% I; K' A ask turtles [ setxy random-xcor random-ycor ]
& F( y$ l1 f; a2 bend5 J) R; J# c5 Z% e( l/ a
to eat-grass9 s. p& Z. u' Z8 j8 C& Y
ask turtles [6 T- p* j' \/ w$ {* y$ c4 F
if pcolor = green [ f5 e8 D5 E7 J* P6 ]9 s6 ^1 H
set pcolor black o- I8 Q8 ^* _0 s$ q1 J% l
set energy (energy + 10)/ I4 |! S: G$ C4 z$ D
]
0 j+ I/ z. `. K6 h( W. G4 o! v. B% [ e2 W ifelse show-energy?
& d" W0 ^! v& g. p [ set label energy ]
$ _6 `$ T' K. @& c, R8 Y5 _ [ set label "" ]
# U, ^1 ]/ u9 E; V- K ]
1 a0 U5 j* @; }% C* H+ C/ S! }, G5 Qend% f. w/ L- j0 y
to reproduce9 }! u7 ~) q& \' Q0 ^* `' C3 Z
ask turtles [
) N, x- }. s0 U if energy > 50 [
0 X$ L/ T) D1 @! z! Z# x* t. t set energy energy - 50
) |# ]# L0 g1 K: M* v hatch 1 [ set energy 50 ]2 |5 ] k& ]% i( |
]$ f1 a0 X% o0 b
]
6 A) p3 D4 `2 H! U0 Oend% G" w: V) H4 m9 M: v0 ]. k Y
to check-death
; M0 L+ }1 @! _9 y N9 V, y2 @ ask turtles [
+ S" D8 }+ r& k3 p; u if energy <= 0 [ die ]
1 b" |2 O! s- {- L' C ]
9 i5 t% x7 a5 M# [4 Oend
1 D- {5 S$ w0 q: f9 R+ \to regrow-grass
, S8 Y: y+ r& T* X5 q9 v3 m ask patches [1 x9 m8 ^/ k6 R7 ^* i+ q
if random 100 < 3 [ set pcolor green ]$ ~' J8 N Y4 p- y* ~% r. h
]# p, M* v- B! @) E4 g& Y7 ]! x
end/ F$ O2 l5 G8 I3 `7 N7 S
to do-plots
9 {& @8 a- d: r set-current-plot "Totals"3 R3 o2 }$ n" H' {- C5 z
set-current-plot-pen "turtles"
! U! f' z- v( s: d" V+ ^' o plot count turtles
- N& N4 ]" u) ]2 g& @( U set-current-plot-pen "grass"6 d, w m: R, h, O9 R
plot count patches with [pcolor = green]2 v5 f* E8 m/ Z- j2 d6 V
end
j# }. o; _) [& I& p0 o1 w可是运行时提示no such plot: "Totals"9 a' }4 p+ h) a
error while observer running SET-CURRENT-PLOT/ R3 \( w# V1 L/ f# Y
called by procedure DO-PLOTS3 x0 Z1 x. [4 ]5 T) p9 B6 R$ w
called by procedure SETUP& [2 O) T9 P1 e5 u/ D. A
called by 按钮 'setup' ?. [- y- Z) E' r3 B; Z( R: q" i
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
