我编的程序如下turtles-own [energy]
# L9 R4 K( g9 C& k" c; s9 ito setup
& V/ M3 k3 `2 I1 o1 d6 t clear-all& d- K- r7 k0 K
setup-patches4 }' U8 X. T' {8 R9 W
create-turtles 100
8 c0 Q, L2 ]) S2 i! W4 \5 A; t. S. U do-plots
9 i j* F. T0 X% Z4 \ ask turtles [ setxy random-xcor random-ycor ] z# d" i% ~( r P( d
end& x2 |2 J- n/ h2 D% `. ^
to go% G c' j1 [6 V/ }. ?: ~' ]
move-turtles: W) g- g1 y' } ]& A- Z" _" s3 O" [
eat-grass
0 a& N& M. A' L9 S( P0 D' j reproduce
5 h* y; o% k5 Q) v. o# V+ n check-death
4 B+ y/ {) C- o1 C: K; I regrow-grass
. a! Q* f8 ^1 v+ |) E do-plots
/ F( K3 v) E5 H! r( ^end
9 o1 j9 G; i6 _7 I: }to move-turtles Z) a* O# L+ x+ |
ask turtles [
! J4 @ l* E$ j: r$ f0 f, g' S) a right random 360
8 V& ^/ m K" u: d+ ?& M forward 1; d/ g" B* E8 r, @1 I" b$ M8 o
set energy energy - 10 r1 ?6 r4 {' K$ Y4 k
]
; m9 z0 M; ~' L4 ?, j. c/ lend
% h+ R* e4 U- V9 A1 x' {! i$ g; Hto setup-patches! m1 J8 i+ o1 L3 B4 B- K3 t; {' a
ask patches [ set pcolor green ]1 C( l: }9 O9 ~. X; Q& L; E
end
( ~" z6 K/ _" Nto setup-turtles
* X/ S1 \3 k# L6 }4 W) O" t create-turtles 100- j! P5 V9 n' `+ ?8 v; t
ask turtles [ setxy random-xcor random-ycor ]5 q( a1 Q, Q3 M) c x
end
+ t$ v+ H3 Z! ^- O* yto eat-grass
' E, W+ `" _4 Z$ s7 { ask turtles [
2 @5 R/ J/ l$ @7 o- h4 f if pcolor = green [
4 J) g+ _ [5 N1 b( c; y set pcolor black0 ?4 ?$ A+ b) @7 g
set energy (energy + 10)
1 n' G+ \6 ?. ?+ _ ]
' E. h. l. w! \6 u% R# ~) V" W ifelse show-energy?+ M1 q" |$ D" B/ `; K
[ set label energy ]% Z2 S; v3 z% G4 `
[ set label "" ]
+ b7 N$ [9 F6 |( G9 | ]
& O2 R. P6 O* o! X7 _! i( b" Rend
# W& [+ v& T. `! s* V& Wto reproduce
3 o7 S* u1 J0 k" A& _5 }, v4 ~/ B ask turtles [) }" x8 K* E6 ]2 P0 p
if energy > 50 [% S/ q. `! _& n9 A& f
set energy energy - 50
+ n) _4 X3 x. G; l% m hatch 1 [ set energy 50 ]
% c, J8 g4 m4 z& w ]
: Y( f r! ^9 H. l9 H6 e# L! I7 V ]
- x* }0 |& g: \4 s/ V- `+ T+ Tend" r7 |2 J( N+ J) [4 k0 c" ]* `+ B
to check-death* N- _ M+ x+ E" ^* b
ask turtles [7 a. H5 _ c, g& C* Y$ W! p, a/ f) D
if energy <= 0 [ die ]8 v) _9 V( r1 G7 _& S: q& _
]$ t* I# J) _: |: @$ t
end* P# P7 d$ A }
to regrow-grass
0 E" w( X( Q/ l4 ~0 R( R ask patches [
1 J4 ~) z6 @0 G! V2 \7 y( f; P if random 100 < 3 [ set pcolor green ]
! |2 j* ?. [/ N ]9 L) {5 R& x, w" r. v" a. ^& j9 G; `
end
+ Q1 {+ ` N3 x' W* `4 dto do-plots
- |1 ?( ] W; k( E set-current-plot "Totals"; u+ e& @6 H t' Q! \& x# O! E3 N
set-current-plot-pen "turtles"
) }$ ~5 C, E; |3 T plot count turtles
2 w0 W9 ?# j; E8 J+ W set-current-plot-pen "grass"7 @5 P: k+ N' V3 L7 v" J1 G/ k
plot count patches with [pcolor = green]
2 u8 H- k, C$ n' Jend( u) J7 C k" j. Q& [
可是运行时提示no such plot: "Totals"- ~) [5 a$ @! O
error while observer running SET-CURRENT-PLOT0 t1 `1 c* D. p; K: [6 _4 A
called by procedure DO-PLOTS6 o; G( T1 G& I
called by procedure SETUP3 t/ |; N4 {3 n7 e
called by 按钮 'setup'. S) t! X* F* V) y, v
求大神解答啊 |