我编的程序如下turtles-own [energy]( a0 t- F8 p6 R+ B4 D1 n% K
to setup
4 t% a; K& q6 O! d- [ clear-all
" q @3 m# ~+ X4 p/ v setup-patches( f6 U! N! F. \1 K N8 a
create-turtles 100
# |7 T3 D; Y5 c do-plots3 v! P/ I2 \& H8 z& F& B) I
ask turtles [ setxy random-xcor random-ycor ]/ h0 v) a2 ]$ m9 N+ K0 C1 S' q$ s
end
) K: D) b" g& _to go- p' S- `9 k+ r$ h" U! K- f
move-turtles( f* X- z! |& F! X1 Y6 v
eat-grass8 A* z! I, q {" B* @. K& r
reproduce# C2 Q9 r/ q. t) @; N6 G
check-death
6 s& \' I1 {3 s/ q- O8 Z regrow-grass. B5 H. M7 \, J
do-plots
# ]7 E9 V0 V' y$ w# l$ A9 Send
8 x$ z/ c7 Z) k6 ~2 t; O) R) qto move-turtles( M$ y3 {6 M; P% i
ask turtles [
1 q3 V6 E7 E' i6 O0 W right random 360
& n4 O) k7 f& T" u forward 1
- V, z8 _- s' S3 w- x$ ? set energy energy - 1
' T8 k# \9 e# M0 Z5 o5 R ]% S. e2 W& \' q, N$ r% M8 i; ?
end
) k3 I- p9 n3 X2 ?$ i" Z+ }to setup-patches7 ~6 R5 o% r& }/ h3 w' H$ V
ask patches [ set pcolor green ]0 c% R. c; B% p+ i3 T" T' b! e
end' F; p! i! s! K( ^1 C
to setup-turtles
' W+ p6 ] b9 @0 U8 z% v1 ^ create-turtles 100+ J9 m* ?/ G6 S! b: H
ask turtles [ setxy random-xcor random-ycor ]
6 g1 g9 e8 V1 f. [$ e1 a0 gend
5 I2 `3 e" v' [# ~to eat-grass
; n" [9 d1 N1 r, X9 D, j' ]. i' q ask turtles [
/ E E$ w% x8 b+ P( f if pcolor = green [
6 w5 f) I6 J8 C set pcolor black
, G! g* i, [% N7 O+ _8 t set energy (energy + 10)
! v1 A4 Q# w8 y( v" g& L( Y ]9 Z) y3 ?- S; |& J
ifelse show-energy?7 F U x( u& a, G/ T# K2 x
[ set label energy ]
# {# T; S) Q9 x" p. i: C [ set label "" ]: |; x+ |2 \* k R
]3 }! k9 d0 Q. L
end$ Y9 I+ K) n, @' y* o
to reproduce/ R2 ~+ _& A* d' p% a; k% m" l
ask turtles [
2 D1 A) T- q8 u) a& E if energy > 50 [8 C9 n, \0 g3 C
set energy energy - 50
0 K% N! D0 O5 `5 n; B4 D hatch 1 [ set energy 50 ]
+ i: ~7 P+ g( k1 X8 Q- g1 Q ]
" V& e. ]. V; f7 ^ ]' c9 W1 J' D) t9 R. P
end7 c6 b+ Q7 g, I
to check-death* @3 E# x0 u1 L. E( P4 _0 i% }3 ~
ask turtles [3 B F( a0 _- Y5 C
if energy <= 0 [ die ]: u6 }" `+ ~2 \1 J: b
]9 ?6 {8 B, [( x: {/ A, u2 Y
end7 S( g0 \. d9 f, l
to regrow-grass, k2 c8 N7 `; u `# K6 C
ask patches [
3 s/ u. ]& a8 m! P2 b" D" J if random 100 < 3 [ set pcolor green ]
3 G* w: c g3 R8 B# M4 W4 q8 `/ f ]* h" ^9 k) m2 x* T! h5 V! e( C) z
end
1 r, {) C2 Z, I5 c7 Dto do-plots, W7 ^5 [, _5 _4 u3 V
set-current-plot "Totals"9 F3 @* i, c: s3 y0 e3 T7 i# ]
set-current-plot-pen "turtles"
- J6 Q% _- T& r0 T+ V& d9 i6 T plot count turtles, `+ u p& V! h* w
set-current-plot-pen "grass"
8 `- Y0 `$ [$ i1 U plot count patches with [pcolor = green], x2 B* C: l( O$ m6 w- S7 q
end
+ ^4 W9 B7 P t- W4 J; P# B可是运行时提示no such plot: "Totals"
% H6 @! n' Q( a% nerror while observer running SET-CURRENT-PLOT
0 B2 f. b! O( E: u& i called by procedure DO-PLOTS
. ^$ h! j; O0 k" \& c* C9 ^; Q3 ? called by procedure SETUP& g+ ^' C7 w- B
called by 按钮 'setup'* p1 @3 F( O% T. u8 L
求大神解答啊 |