我编的程序如下turtles-own [energy]
4 c) @% n. @: T/ M$ p3 Ato setup
! ?6 q3 Y8 c5 M8 }% J. x clear-all4 l$ ~( E8 a/ L3 Y0 G' }
setup-patches
' C% k: }0 {8 V2 ?! g create-turtles 100
3 w7 k. c1 j6 }- p do-plots4 j7 ]( o6 L& d: p* ~/ v7 c$ d
ask turtles [ setxy random-xcor random-ycor ]- z) b/ G; _5 p; }
end
! C3 V' ~) E; ]8 }7 q; H3 c- p* eto go
v$ e4 b5 I0 ^! }7 @6 m move-turtles
. ^- j( @0 Y5 P; D: F! L eat-grass- o0 w6 N9 M1 K( j
reproduce
0 m m. z) t% M check-death( D( D" Q1 r" z! b \' ]" ^8 C" n
regrow-grass( a( E0 E- M# F9 r# a% K2 W# I* _: @* s
do-plots! K% ~5 K& t0 a! {) N& ~' K+ o( G
end/ o% n' V2 R) D" e
to move-turtles
' |% W3 C1 ^% I+ o; }4 x& q! r ask turtles [
2 G( P4 q) S l8 z7 C7 h% g2 W right random 360) X( X9 p+ `) ?1 W) z9 r1 k
forward 1. _$ ]7 I$ r7 E" D
set energy energy - 1
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end, `& x. l$ R8 F) V/ i
to setup-patches3 w4 O& O% @* U/ k L
ask patches [ set pcolor green ]
0 {5 G. `5 {/ x" Zend: N' v/ E+ |) k0 K
to setup-turtles
: \3 o2 U2 C' V5 e4 ]/ z create-turtles 100
: @5 ?1 B3 Q4 k) Q ask turtles [ setxy random-xcor random-ycor ]( q% `1 T+ N: |- k% D; a0 L, c: r
end
4 t: u$ z3 a/ r' u) Y* vto eat-grass2 _0 |8 c- Y/ \4 R/ U
ask turtles [5 `1 x7 ~- [# o: P- ~
if pcolor = green [1 I: d9 i/ R {
set pcolor black
; H" q2 L( q$ j# Y set energy (energy + 10)
+ r2 n6 M8 x0 y7 a3 B) N ]
, A( Q0 s1 E- d% { ?' P ifelse show-energy?
$ M/ N$ Z% @2 _ [ set label energy ] Q; `, N7 U' L2 p7 C- X
[ set label "" ]
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end
& s/ z# C' k9 u; x- V: S! ]to reproduce
" G! N5 G4 i6 _; d7 ?$ d4 `- Q) _* Q) e ask turtles [; H* r! K. a7 K" Y4 {$ Y3 [# V
if energy > 50 [/ O* t6 \- Y( Y- E/ B, e
set energy energy - 503 @" H( f& }6 _+ n7 `4 w
hatch 1 [ set energy 50 ]) D4 G1 T; V$ x/ _
]
( L( K' e& P/ Y& \( U& |% ?+ N; J ]
/ S* l% Y# h1 n2 z8 h. z+ I4 T |+ {9 Tend4 {) s( `% W9 E( J
to check-death' R( [: w$ a( L0 e0 k
ask turtles [8 z( G5 @8 B& z3 t) h
if energy <= 0 [ die ]) g3 Y6 Z, v2 J& i1 i) }
]
5 ~- x* ^$ {7 `, n, wend
6 _4 E/ {! ~/ Wto regrow-grass5 f3 n' j; P. o8 t. H; n- w
ask patches [# L' v5 }! |6 g& M
if random 100 < 3 [ set pcolor green ]
) U5 x8 A5 u' I5 O ]
5 e4 s* w/ u5 O V/ h4 Aend& p; @* j$ j4 ^ e
to do-plots$ Z' S; K+ }" w; D* V1 Q
set-current-plot "Totals"
7 C; M2 k' [2 o6 G: q set-current-plot-pen "turtles"
" i9 q' l9 H; w( N: O4 ?& n4 e plot count turtles
3 c0 T" y) Y# b" l; ~& L; x. u. L3 Y set-current-plot-pen "grass"1 p+ M8 I1 w/ @8 T6 x, s. {
plot count patches with [pcolor = green]
# k3 z: S4 N% p+ H' _end
! [/ ?) ]% m/ C. K1 b" z$ C可是运行时提示no such plot: "Totals"
' s7 _0 S4 Q! b" @: L; Rerror while observer running SET-CURRENT-PLOT
* C1 `* b7 U7 ^; i$ Q( M. ~4 l called by procedure DO-PLOTS
* }# P W5 X% g9 [; C2 w& e* f( c called by procedure SETUP/ A+ E% W8 E a- w: T
called by 按钮 'setup'
' Q/ h z, ^( {9 u* e, t求大神解答啊 |