我编的程序如下turtles-own [energy]
2 w9 x& P4 e6 L( n8 \: Q" bto setup
; V) Y7 z+ e+ p: B; d clear-all
* r2 r/ k V& i5 E setup-patches+ ~! c$ y. {" _8 u. A; k( `
create-turtles 100 s( C6 v4 W& q$ @' c+ @
do-plots m% T& I, u- g" N
ask turtles [ setxy random-xcor random-ycor ]# s* Q E1 v% w' y* u
end) |; P$ F. M3 K8 O% m3 R/ q
to go* F( V1 W6 ~- }+ g7 p. N w1 X1 w
move-turtles. h& y& a$ b& e9 Q
eat-grass
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check-death
/ w0 ~" R" n+ @9 k; v7 F3 d regrow-grass
4 c% z( t+ E# ~: K do-plots
% K' w. v1 a9 \5 u1 g4 pend$ t" G. W' B) `% o4 ], M
to move-turtles
6 A7 P6 r% m& ]' k ask turtles [( _- K1 D- N( k" _) v2 e6 L* \* P
right random 360
; [7 D; J! C$ j forward 1
1 h1 w+ m3 S' [2 A set energy energy - 1
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8 v$ P$ H- D, n9 y6 u: oend
& R" \/ `( |4 ]& rto setup-patches; d: x1 w" m& T# F* @
ask patches [ set pcolor green ]
. w/ ?" ]) M1 r) l5 Q* x! j8 j/ z8 Mend
1 {. Y4 m- y5 }4 t! ~3 v# ]: n* U$ Sto setup-turtles1 }) ~# k4 ~* e6 P; i
create-turtles 100- C, s; G( d2 m; _# ~; Y
ask turtles [ setxy random-xcor random-ycor ]
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to eat-grass
4 N( x0 u% N/ d B3 u# e' x; @ ask turtles [
3 Q% ? d/ i z) n, |& j if pcolor = green [* [: l& A( b, u+ r& F5 ?2 o1 |
set pcolor black- X8 N9 V1 U% t- N
set energy (energy + 10)
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ifelse show-energy?
$ @7 U, | f7 @1 { [ set label energy ]
2 e- p/ D% s" a+ g4 O [ set label "" ]; `6 k1 p4 j" h) y$ y
]
+ V- ]' j# p' A" p* s, C# \end# _% u2 r8 `1 Y& l' e7 |8 t7 Y% Y
to reproduce
4 N1 F/ X: R! S( o- o1 V6 s ask turtles [# ?2 Y" g# m3 n* G3 S! p! B0 p
if energy > 50 [
2 x" s1 \6 s u# z set energy energy - 50
4 x( A7 c$ q, l: s/ ` hatch 1 [ set energy 50 ] t( h' N, T' M$ P; m
]
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: S9 _: B) f3 |8 bend
2 I) P6 |& t6 Oto check-death Y* `% b- i6 ]% O( F6 f6 z
ask turtles [/ d2 x5 N) d% f# o+ S) F( o; E, v
if energy <= 0 [ die ]# i1 X' G B, A& E. { c! p
]
1 G. O4 ~- D7 ?9 Q8 Fend
7 Y% n, W+ ^( |" Y0 n+ l( D3 Wto regrow-grass
$ \8 T0 O# f0 N+ M& J, @3 | ask patches [
2 F/ X# M. z! d( h8 V/ N if random 100 < 3 [ set pcolor green ]
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/ y( q- v$ E4 u# I5 e: y: A" uend
7 F7 c2 X m8 @ s4 uto do-plots/ h0 _2 _9 J1 w0 x
set-current-plot "Totals"# c8 w7 k. W7 k3 N
set-current-plot-pen "turtles"' x, A4 z2 Q. V( x i4 w( K
plot count turtles0 P2 o o# F9 V' y: i0 i H" q
set-current-plot-pen "grass"; t, X1 }( c6 t) G
plot count patches with [pcolor = green]/ z- J3 n6 R, ?( T$ \
end
" t( g, o$ ]' s3 D/ t3 K- H: c* n可是运行时提示no such plot: "Totals"
: K" ~ W$ ?6 N0 A( `6 perror while observer running SET-CURRENT-PLOT
# c) x! w2 t( O" S$ K3 p called by procedure DO-PLOTS
: p6 w6 f) h4 {$ x1 q7 z# V' g called by procedure SETUP& V b' P& o' s: v( ~
called by 按钮 'setup'
' t/ m& ]9 [: K: j/ ?( T- T5 h" h求大神解答啊 |