我编的程序如下turtles-own [energy]) |' V% z9 g' Q+ ]8 N, s: q" c
to setup
5 P6 w1 O2 l7 M clear-all
5 T8 W ?) a( b setup-patches' K/ k7 \' h, o' ?$ _4 ]. k
create-turtles 100) X" P7 D- f0 s' R& R3 ^& |/ m2 B
do-plots
: t' L" t+ J: H7 x4 m1 C# g ask turtles [ setxy random-xcor random-ycor ]
) j( i4 c" Q4 F0 {. L/ h/ r0 v+ Yend
5 w9 U+ q8 Z, y' E( J% @. Uto go0 Q" S# f$ k) @
move-turtles0 ^/ V' i0 L6 w+ c' s5 v# Z
eat-grass! F( s+ |: K. C S2 x1 d* W
reproduce, G+ N0 {, T4 |6 r
check-death0 O& \$ U6 s: v0 A* r( w3 H1 ^8 a
regrow-grass
6 Z0 W2 f8 y) K c4 h/ T$ ]& z do-plots
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to move-turtles, W7 k, N9 n0 C
ask turtles [
+ t8 P& F: l+ G' ^. W8 w$ M right random 3609 p3 ~! ~3 E k
forward 1$ G; s- m4 e% s7 {8 o2 A7 u
set energy energy - 1
" E# D( ]" D0 j! l/ M ]
% F( U0 @( K7 A1 dend
7 U3 K, C; k* p3 v. B7 F) eto setup-patches
9 q$ l3 p; j4 _8 I, j# b ask patches [ set pcolor green ]2 ?. A/ O. g4 m2 n3 V# \' s
end; e+ d/ J* X" a% X9 s2 {
to setup-turtles
% V" @* p) b' \ create-turtles 100
( e2 z4 @1 \6 \- c( y* V ask turtles [ setxy random-xcor random-ycor ]
* ~# G, w- m" h. c4 u+ f1 lend& H- _0 |) g ~0 O
to eat-grass
, I# u5 F; A" A' Y. u& c P& W ask turtles [
. F3 O B, I9 ? a7 S" e; b8 f5 v( Q if pcolor = green [
7 \! J& {& _1 m) B: G. K+ i set pcolor black" I/ w% d$ v& h2 r7 e
set energy (energy + 10)/ i( N6 n2 Q- w# k( k! N. \% J
]4 m. P! P& s$ c1 Y. a# a0 P$ E
ifelse show-energy?
- R' D6 x7 j- V [ set label energy ]1 Z' x: b' N" H; m- H8 }! U5 [3 f
[ set label "" ]/ i7 g8 ]- R& l: a6 l& z1 |$ p
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end
$ u& r, D$ l1 A5 C$ y6 Jto reproduce* G# k, B+ h$ E5 I9 F, \! T- Y
ask turtles [8 ]% z, G9 G5 o. Q( `+ ^9 H4 w
if energy > 50 [! C! w# {" V9 `" H
set energy energy - 50
R! G7 n+ x1 @& C( y7 `+ S hatch 1 [ set energy 50 ]
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4 Z- g8 N( w! |" h3 P7 q ]" b( e( w- K# [3 y
end; Y# a7 J; ~$ m8 _) J
to check-death3 K) d- `1 A! ~1 }
ask turtles [
+ W8 r/ d" F, t, ` if energy <= 0 [ die ]
" y0 I: e' R' N; p ]* u, P) U/ B+ W: N) x3 u1 J8 n# X) s3 N
end
" i! \' [( }( u- H R/ C6 qto regrow-grass
9 c. }3 F' A- Q& }# ^- e0 o# } ask patches [
7 j( k* i/ o$ a9 m$ q& p. c if random 100 < 3 [ set pcolor green ]( p7 k" d& ^) u3 I0 j, J
]$ ]' }5 n% Q2 H% J8 ~$ S
end8 v; i2 A) W/ N
to do-plots7 ?6 K/ b- l. C
set-current-plot "Totals"0 u# G: O9 Q- y" x. {# f
set-current-plot-pen "turtles"
" l5 R$ C, W$ n/ E plot count turtles% s9 s8 b, }* t) V9 \/ c; q% F
set-current-plot-pen "grass". y0 s1 x; n! D' y/ `$ {
plot count patches with [pcolor = green]
+ y& V* O( s- u7 }, e0 Lend
' V: H3 M' ~/ u3 N5 j+ U3 _9 n可是运行时提示no such plot: "Totals"1 R& v$ g7 Y5 m: {6 \ ]
error while observer running SET-CURRENT-PLOT
# j& u; Z) t4 h a called by procedure DO-PLOTS
J. `# ?9 Y/ B' D' p9 ` { called by procedure SETUP. Y; L |& \7 t6 L9 d3 c# y
called by 按钮 'setup'9 Y4 v0 @ Y& N- y" }' S; X
求大神解答啊 |