我编的程序如下turtles-own [energy]
8 d. ~2 \/ M6 N; @: L1 wto setup
. Q I: L5 A- _8 F clear-all5 n$ h7 U$ R4 i4 P r1 b7 l
setup-patches
/ p9 y) C& E. g' e- _, j create-turtles 1006 c6 m1 N0 y9 H- O
do-plots
+ G4 O% q* E3 x7 U$ J! u ask turtles [ setxy random-xcor random-ycor ]
+ P/ \1 L. x/ A8 qend
' y n6 P. C. B; }9 F9 F/ \( `6 N1 X4 Lto go
! K9 u- T ~ ?5 \) y/ L; r move-turtles, y: L) ?* l9 Z# J5 v: D2 E
eat-grass: d3 V+ n4 @; R5 j' c1 U# N( O
reproduce! _+ c( a& Q* i/ c+ r. E. ~
check-death
- p5 }0 N# |9 {5 t. K regrow-grass
" ~- t3 V- a6 {7 ]7 s: _; B do-plots# B9 i7 T2 H3 ?$ V/ |
end
0 ^7 j9 V& H- a8 u' fto move-turtles$ O/ j' y2 [6 E
ask turtles [
7 t& w! C3 ?3 `0 ?. J- | right random 360
4 @' z( M0 ~) S$ l% M forward 15 l9 A, q' q: V
set energy energy - 1
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end
+ S; ~7 ^. Q% B- [5 rto setup-patches
# |. }, p. H2 y; |6 C- c ask patches [ set pcolor green ]1 r* K& z! k/ E
end* E6 q+ e9 B8 x
to setup-turtles
% ]+ R U1 h8 l, ^ create-turtles 100# J; i& G% R2 |
ask turtles [ setxy random-xcor random-ycor ]
4 G2 X' T; h5 u% a; c' Mend
! a, u5 C$ p8 M1 }6 b e( J# k; fto eat-grass
" g1 i9 _& s4 w ask turtles [* u! N1 u! l' d1 G$ x1 p
if pcolor = green [
+ a* O: t2 n/ u: U) E! @9 M set pcolor black) ?: i8 m; l, @+ E U9 X$ Y: M5 x
set energy (energy + 10)+ ? }( V4 `9 D+ ~5 S+ V D
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ifelse show-energy?6 c3 @9 e; p5 R! _* u
[ set label energy ]& X( R7 y8 ?/ q8 N' H) Q1 N
[ set label "" ]! m$ L: o+ c* ?$ h( P; ?/ ~+ V
]
! E5 f9 \* y+ G4 Cend
5 n6 |# z) p9 p7 gto reproduce
! b- Z8 {$ ]* F( j! h ask turtles [
" [, Q( p9 `& l( E if energy > 50 [
3 T8 \; h3 \/ E1 y# I1 H% O0 k set energy energy - 50$ _, Z' x n" C5 t! s
hatch 1 [ set energy 50 ]
% ?7 q: W. w8 l$ F ]
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end6 U% `6 u1 g8 I. K! y; L9 c1 e# p9 a
to check-death% M, g8 M. T6 `& i+ K$ ~
ask turtles [& G! ]: i! G5 c5 D' b5 o
if energy <= 0 [ die ]/ X9 c0 K0 P5 \6 A# I5 ]
]
& a1 E2 d3 s, j9 N9 ^' Cend* L& K; _& n8 }; e! G
to regrow-grass
/ W# r3 q' ?7 X& d$ O* H ask patches [
2 w! Q4 x' L+ z3 K if random 100 < 3 [ set pcolor green ]
; b( l) `! C' @$ } ]
}: w* k. A0 N/ hend, ?# J* m. U" h Y4 d
to do-plots
5 m: _. m |: Y/ i4 E$ C# B set-current-plot "Totals"% ^2 r& ?9 W8 l f8 W% h: `' U$ t
set-current-plot-pen "turtles"
) h9 N6 y4 G% ?. ]+ x plot count turtles1 h1 x" _0 I: S* D" A& C! E
set-current-plot-pen "grass"
" W( D: d8 _0 Q3 z" s8 ~ plot count patches with [pcolor = green]
5 q3 M9 `- h9 R: x, p6 { I8 Jend
^* s# C/ P( f" J! q可是运行时提示no such plot: "Totals"& m; b2 O% V! h: Q" ~
error while observer running SET-CURRENT-PLOT4 a+ ?) a2 Z/ G5 D4 y5 O
called by procedure DO-PLOTS
6 {0 b* W; g. Q4 `/ v, K! b& O called by procedure SETUP
8 n5 ?7 k' H! L called by 按钮 'setup'! Z. B7 t: t( R& P+ T
求大神解答啊 |