我编的程序如下turtles-own [energy]" p p2 Q. r. U. }) @9 e
to setup/ m8 |' i( S. n- T0 e# k
clear-all. ] [2 [+ G+ w5 Y v5 U, d
setup-patches+ H2 E, J' q, _( h4 E
create-turtles 1008 ~8 V& A, f' L
do-plots" L! z. P( d8 o, e* n; B
ask turtles [ setxy random-xcor random-ycor ]% m0 j! A4 @1 I) {# j6 N; m! m( o
end. d: R3 [) {7 W1 c
to go
1 H9 b6 q( b4 `% C& T" a0 a move-turtles
* f. w6 S1 d. M. Q% i! {! D: B eat-grass, }4 W1 Z1 R( I& W5 s/ v
reproduce
- ^% [9 S7 g1 z+ x1 _ check-death9 q W t; z, r: [; U
regrow-grass
2 {. @1 Z5 o2 [2 D C1 ?3 A do-plots9 X$ I' Q& W# ?7 Q
end2 X1 L$ q3 d# w! q& a
to move-turtles3 g8 E: T; s) w5 q* ^
ask turtles [
* e( v6 R2 k0 L; f right random 360
: E5 g3 K/ s2 |' E+ c; N forward 1
6 {8 T3 [; f$ d8 l8 c8 R; I set energy energy - 16 s0 }$ l, A/ ^. c* e9 Q% l
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end, _4 p) I' ^$ a4 f7 f
to setup-patches# x* r. {# Y1 @5 y, I
ask patches [ set pcolor green ]. [$ v- ]( i/ x
end
* O6 G# ]* p/ ~ G! F! B: }to setup-turtles, m+ _2 f- k O) _6 r2 m) E) Z
create-turtles 100
+ o( |7 ?. G3 N j ask turtles [ setxy random-xcor random-ycor ]
) V5 t" u! {, s! a9 vend8 i! H0 W1 @ p- _( y1 v6 ^* a
to eat-grass" W; P0 b! L$ k' `
ask turtles [, \( z e* V% h) I3 L, H. A; b) I
if pcolor = green [ l; e4 A1 @9 t2 `7 r: _. P# h) ^
set pcolor black
1 c4 f \6 z4 a3 c* l set energy (energy + 10)3 e/ T4 Z0 V4 X7 L
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ifelse show-energy?
( k( Z' h2 M' K0 _1 ^% @ [ set label energy ]3 j) M: G2 I( ~0 _( v& r5 ~
[ set label "" ]
* k& J3 `0 E/ e" s% V) z( T ] q3 r7 K9 j+ ]& a! L& r/ a
end) @5 q/ v& o. K
to reproduce7 m) K ~ v' M1 b& D- ]0 M* Z
ask turtles [- v0 ?9 L( b# V# {: d$ P( q
if energy > 50 [" T5 `4 v9 b: W- L. j- E( v" k5 W
set energy energy - 50
2 ~5 N) }! S; j5 A( h hatch 1 [ set energy 50 ]
|% f% h9 ?( u/ `' ^# g: u) T ]
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end9 h% e0 t: q6 w, k/ m" b/ W# Q5 V. ]
to check-death1 g; G& b8 ?# |8 E- C& P9 K
ask turtles [, H8 t6 [. e E- O" b
if energy <= 0 [ die ]
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end, Q9 p" d% Q0 B2 n
to regrow-grass1 Q: J! o* g8 o2 f& R( n
ask patches [
U! n$ O/ H7 a2 h/ E if random 100 < 3 [ set pcolor green ]- p* d. Y$ `0 \( p* {5 x
]% E( Z" i# i1 E" \. `4 Z
end5 B- ]5 y' k1 Z) ^/ F7 v% q" o
to do-plots f2 l( E; L8 X$ ]0 ]5 }
set-current-plot "Totals"
1 V3 Y& `5 [/ N3 [ a1 ^ set-current-plot-pen "turtles"2 p! i' E* j& o( t3 ]
plot count turtles
" N- V. [$ T3 f5 s set-current-plot-pen "grass"% k2 T! a( T3 b- e! b$ J+ `' k! u
plot count patches with [pcolor = green]
. ^4 U) ?2 F8 A3 Kend
! q% c3 J/ T- K/ E5 F可是运行时提示no such plot: "Totals"
' G% G+ u: f. u. u+ g Ierror while observer running SET-CURRENT-PLOT. u) |4 i8 z9 d' C* o0 H# w
called by procedure DO-PLOTS+ F% z9 ~6 d2 u, L r) D$ o/ _
called by procedure SETUP
( j* f' @9 ?5 B3 x$ F called by 按钮 'setup'
; X8 W/ r2 s8 F; N* T6 ]( B& ^1 t求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
