我编的程序如下turtles-own [energy]/ g8 [9 M- ? o3 Y5 }
to setup
/ j- o2 a V: i6 Q) P$ s( T4 o clear-all
c; e) n% A( }- x) m: D setup-patches
, i( y+ W9 w& R5 H* O create-turtles 1006 D- b& R- d+ V' ]- J: k
do-plots& e) b7 j+ Q- ~
ask turtles [ setxy random-xcor random-ycor ]
0 r3 q% h! t8 ?3 ~* \end- Y# F+ E( j/ R3 \7 g0 ]6 m7 G' E
to go* l9 ]7 e4 I" v
move-turtles
u& B" ?( ?! V- `; G: W' w; ]+ m eat-grass# j* |, }. X% e8 s9 \' [
reproduce& x8 ]& ?2 p7 k
check-death% v4 z0 p9 {5 j# A
regrow-grass
9 J0 n/ a3 z# m C+ m do-plots
; p) S5 v G8 Y; o. @2 s( L' oend
% e( P4 U* ]) z6 Q1 ]: mto move-turtles
+ o' \2 B* I# r8 S ask turtles [
3 k3 `9 z) I$ d. u3 _; C right random 360$ ^3 w8 j8 \8 p. Z5 n% E% Q& c
forward 1
+ w q( z0 P' i7 I% q( f set energy energy - 1
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$ b# w" y3 @! Q c8 z u2 `" N+ \end6 K, U2 Z' m# C# ~8 ^
to setup-patches8 ~4 M# W X5 c5 a: x
ask patches [ set pcolor green ]
/ }5 q4 B; f1 X! O& Nend
! h; Z; }- A8 U% v' Kto setup-turtles
0 Z% K2 b' m) d% b3 W2 J create-turtles 100
" {! p7 a+ a/ r% `4 P ask turtles [ setxy random-xcor random-ycor ]
$ J' S1 M% k: n* d" i. s) m. wend
; }* m8 L& X1 E* I* V& R o: ?" g0 nto eat-grass& S4 m6 u h v+ j' V- Y
ask turtles [; A! Z: d3 m* s; D" P0 U
if pcolor = green [
: { c T. D+ ^" J; ^9 _ set pcolor black) Z" W# p3 u7 C- K0 i* @% Q
set energy (energy + 10)( t+ a q- ]' G" s1 ]! a
]' Q6 Q8 J4 O- o' Q; P& z7 h
ifelse show-energy?
1 ^6 ]( o {5 E8 t. Q2 o [ set label energy ]" ~' {+ P( r# f$ N: p. I7 [
[ set label "" ]
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( g5 A; t. X: D7 H3 E8 @/ I* zend! r9 C! F+ K2 r" j* R4 u( g
to reproduce
: k' X3 G- G( z, w- i ask turtles [
2 R; j( x8 D1 G if energy > 50 [
1 k( c4 D8 M/ w( v7 s set energy energy - 509 k0 q, z v: S9 e2 M% e
hatch 1 [ set energy 50 ]' q9 y+ i5 n' `$ w2 x
]' b6 c) z$ n A+ a- E* |( r
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end
9 _3 G9 B' o+ S' K( T$ R9 K1 z: ?to check-death
' Y4 O) r6 D$ x3 v; j8 ^ ask turtles [( \; p5 q! U. `. n
if energy <= 0 [ die ]
& F, a' \: W9 g; P ]
\5 R2 C# W, w* W+ Vend
5 [) ?( J }; D7 A% oto regrow-grass
% [& o, |3 v+ o# p$ } ask patches [; E4 j; H _+ y* }
if random 100 < 3 [ set pcolor green ]
X) F: [( r$ G" |' i R0 o% H ]- j2 m4 o0 I& L d! V
end
# _& G: ]7 t# vto do-plots1 q1 p4 \+ X2 `. ~
set-current-plot "Totals"
" M* U% c; s% c8 {. {5 ^ k set-current-plot-pen "turtles"
0 x1 b& s( K8 r; n! J& H; a plot count turtles
. N# f) a6 |! C set-current-plot-pen "grass"
+ v2 d/ ?% g b' ?+ [ plot count patches with [pcolor = green]
0 v" N& x% w) K5 G: T( ^2 A4 Uend- I$ S. A. b' ~/ n) _0 J/ ^
可是运行时提示no such plot: "Totals"" g& V: E, Z7 A. v. d1 r
error while observer running SET-CURRENT-PLOT
$ M R# {8 T, H* h7 W( Q* P V called by procedure DO-PLOTS
( v1 ^5 N( g A* G) { called by procedure SETUP
; l) B1 C7 n9 c8 R" r% T called by 按钮 'setup'7 o l, C2 O' @3 V1 ]: A9 M( j
求大神解答啊 |