我编的程序如下turtles-own [energy]
1 c- {2 d9 ? }: ^! bto setup
+ K6 w- s: x+ k! T+ f clear-all
) O8 K( y3 Z7 Z! {4 a setup-patches. T3 C9 o. [! T, }4 y1 o. L5 H
create-turtles 1003 p n1 a8 d. |, Q' s7 }# i. _
do-plots
- }6 Z: K7 D7 x6 p+ p ask turtles [ setxy random-xcor random-ycor ]2 i/ h0 v: B$ t' T- y2 T$ A* n1 n$ }% A
end' S' W1 T/ y, o( I( ~ Z _
to go1 q0 m! |& D9 A" P" b+ B
move-turtles
4 u2 n# b7 z/ [; d# ^' e eat-grass$ N0 b( {' i7 D/ q' c! p6 Q2 N' h
reproduce1 R$ M8 w8 S0 d5 G" t' o
check-death
8 P3 T) Z) ]8 r3 ^- D regrow-grass" k0 D% T5 W$ M) E: [
do-plots) \- P! o# t9 _1 X
end
* ~- U: u8 ^+ w4 P' `to move-turtles
# L" o u3 p$ [+ | ask turtles [
/ j( L# w# n W, w5 r! Z right random 3603 Y! b+ O3 c7 _6 a% W. m
forward 1
. I0 ^& A; j% G* T% j set energy energy - 1$ J3 m) G* Z g9 O7 R
]7 ~1 y5 Y" H& B4 t. M! X. t# k
end6 B. z4 c) q3 w K
to setup-patches
" a; A8 Y* P! X9 T- } ask patches [ set pcolor green ]
, e5 f k& G, Q3 \ h$ ]" Cend+ ^8 U/ t1 d* p/ y4 O3 ]9 B
to setup-turtles
$ {7 _" T. M: k9 V+ y8 r create-turtles 100
' ]. a; U" j" ] l: A4 ] ask turtles [ setxy random-xcor random-ycor ]
+ k' l7 `3 j4 k& eend$ C- _: X, \# t1 i/ U
to eat-grass
3 M& m6 o" M0 ]% O ask turtles [
* u$ |1 a/ ~% n C7 d: m) E9 ^ if pcolor = green [
9 t$ a0 U) j- ~$ G: T1 e) U) a set pcolor black
! | \0 g; H4 `( M @5 G set energy (energy + 10)! X. F8 \ C* s& j" }
]
4 e2 u$ z- p! w ifelse show-energy?
r' n" n) K4 Z [ set label energy ]
/ O8 ]/ P: m d ^ C) w* K2 f [ set label "" ]- O! ` x/ m2 [8 G. J7 ^: ^
]) k' [. P" }4 ]# f$ s
end& R+ |9 R I( K# c, ?' |+ V
to reproduce
" i3 I% r6 ]6 j, [0 E. i5 ? ask turtles [
! H$ \ W( j; P' H% y if energy > 50 [3 `& }2 r, I5 u3 H( f! G
set energy energy - 50
; u1 \, Q- ^) ^; w2 a/ Y, l hatch 1 [ set energy 50 ]
5 z) }+ b% q3 |. n! k ]
/ M- N5 {0 w% c2 M2 L0 L ]8 O; h' o7 ^1 X- ?* H+ a' Q
end
. I6 ~1 U) G2 q3 j# }5 a. @6 j" Tto check-death: K2 _; D7 n3 W. o$ e! R
ask turtles [
E- y6 }1 C1 D8 a+ O if energy <= 0 [ die ]3 H9 P- { _1 w, I4 W! _
]9 Z: j _/ ~# D+ V E' X
end
! E7 b( i' {4 }- T ^to regrow-grass
8 W F9 W, x, n6 @ ask patches [& H x; ^3 \5 N8 M' B ~/ t
if random 100 < 3 [ set pcolor green ]2 \6 [9 R+ q+ S7 L1 {/ g
]# L4 U8 m* F8 A
end
) {( E0 x+ x+ i ^# C. Jto do-plots3 Q0 g' q B" ~7 s( O! J a* W
set-current-plot "Totals"
5 z6 c+ S7 s1 O, ^- Q' k3 ` set-current-plot-pen "turtles"
1 J; b$ y8 p1 q" t plot count turtles
" z! d2 }0 K ~5 O. } set-current-plot-pen "grass", n* G/ `2 ]1 j( E' I' R
plot count patches with [pcolor = green]$ f9 q2 q4 A+ d+ F$ x. t, j
end3 n7 v4 J/ n: c8 D
可是运行时提示no such plot: "Totals"
; Z j) O$ h- N" @" \+ i* Gerror while observer running SET-CURRENT-PLOT: ]. _ e! l9 @* G, ?
called by procedure DO-PLOTS! Y; i- f8 l/ c
called by procedure SETUP8 x/ @/ S) Q& Y. r9 l# ]1 ?
called by 按钮 'setup'
' }, ~, T+ J# e y5 p8 ^% T求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
