我编的程序如下turtles-own [energy]
) f' C% X D2 t0 N8 a3 p3 Uto setup" {; T& [' {; K' t
clear-all
) D9 f! _: E" o# e setup-patches
- o7 R: h! U8 C7 D create-turtles 100
+ V1 |+ i4 U4 X do-plots
) f* S3 u3 \" F3 } ask turtles [ setxy random-xcor random-ycor ]
# d/ p0 A- ?, hend
) T/ D( b/ m' V" @5 g) D: B5 N3 A, U0 Ito go
) @6 ^: R5 R1 y2 x4 a& d, C move-turtles
+ x% }. W& n; E3 Y; `3 a1 b9 s eat-grass. Q) `' d: f* F) q, g
reproduce+ P$ _& N Z9 e% x n* e
check-death
0 |: ~% n2 }: ~" {' A regrow-grass; e: e( k# g& x* `8 |
do-plots8 @/ Y2 e8 Q* c8 g+ s- Q
end# f* l) c6 J4 {* ?8 A
to move-turtles! w* c$ ~* o9 L$ P; P$ O2 |
ask turtles [* I% o; ]- Y8 m* o& f
right random 360: a1 M8 T1 O V& r' _: [. N
forward 1' E. R0 g4 K- U! E1 V6 S" r
set energy energy - 1$ r: k1 @; V1 x( H/ i
]) N) \/ G6 `7 n. m, i# d) F
end
0 g" E6 C/ t3 K0 E0 tto setup-patches
% a! m" S; W6 ]1 ]9 E ask patches [ set pcolor green ]
5 T: ?3 s* |3 j7 f& q! |; W6 }6 rend# ^7 j7 Z/ D' P) [6 M0 P
to setup-turtles
0 C( i* b% N. P9 P$ c' p* u create-turtles 100! T5 a) R& h2 d* L" W
ask turtles [ setxy random-xcor random-ycor ]' W; g' g6 r2 e
end
2 u [" O7 O& D8 m. zto eat-grass3 H! d0 t9 f, x0 l0 l
ask turtles [2 C2 k3 ^' x! |3 ^5 ?& ~
if pcolor = green [0 F% I: r3 w1 H4 Y$ {) o2 I1 P
set pcolor black& B1 y7 f- |1 o6 F5 o9 ]
set energy (energy + 10)3 f! ]2 L- S4 }; W/ x
]
5 G) d1 h4 S' l, [ ifelse show-energy?( i6 N) l2 J. u0 T" ?
[ set label energy ]
# \* U, [& u9 o1 m [ set label "" ]; d' U8 q5 ]% K+ `7 u: s; b
]
# V- k4 X7 y% J3 @4 a [5 send
; T+ L4 Z. C( Mto reproduce2 X3 O, ^2 t$ F
ask turtles [
% n6 j( {; }. m$ _ if energy > 50 [
1 p* g0 Y+ W/ B set energy energy - 50
" Q2 N# O2 ?4 s; V# U3 C hatch 1 [ set energy 50 ]
5 W$ J6 O( T4 H. o. q! l ]
. q; q3 w' S* j7 P ]5 ^& J& d, l3 Q& U4 S7 @
end& ~% G% A( A& c- F: g3 Y
to check-death+ `5 \( A7 ?' g- f( _( e
ask turtles [7 P" U0 x( S2 q
if energy <= 0 [ die ]
# F* @7 L) N0 u# v ]6 [! b5 K2 i1 B+ D
end, s9 r/ ~$ v, X+ K% W9 R- w
to regrow-grass
4 |9 k$ K! b& ]# I# | ask patches [ Q' O" b1 P# e; q9 Z
if random 100 < 3 [ set pcolor green ]* m3 s: |; u8 }: n1 B$ H9 S% T
]
_% g- T( c3 T0 H9 xend
4 Z2 z) ~* f6 n- r% Z+ V1 [. n, m0 Ato do-plots, k) k' {& r$ h9 i5 y. l+ @
set-current-plot "Totals"
) G: ~% d/ K( }7 I set-current-plot-pen "turtles"
) X: q+ m; s# c plot count turtles: C$ D, h* N8 [5 |/ v3 L
set-current-plot-pen "grass"
- P7 _# N0 v1 [! l Q plot count patches with [pcolor = green]' y% k' p* k9 x. x
end
% t1 W$ l+ t+ H4 \/ v可是运行时提示no such plot: "Totals"
2 e8 I$ M% h& D: \3 H+ Oerror while observer running SET-CURRENT-PLOT
8 Z+ H; u& t9 B called by procedure DO-PLOTS
1 l) e. w' [! y- {3 m called by procedure SETUP
5 p- K1 s) C" E; v called by 按钮 'setup'& I* a( _* S/ A
求大神解答啊 |