我编的程序如下turtles-own [energy]$ y1 j& Q0 {1 }# U: L
to setup
/ X# x1 V( R8 z% M& X6 u6 k1 V, _ clear-all* _0 I9 r7 U8 |* d, d3 D! c
setup-patches0 d4 Y/ |+ T/ ]
create-turtles 100
# P1 i9 j P4 h4 Y0 O8 l# }4 v& P do-plots
( N% T9 p( U$ F3 R ask turtles [ setxy random-xcor random-ycor ]
' D( U& j1 r; d- send
7 z0 T' r1 {. k1 E4 ^! ?& _to go
7 y% t7 {) O/ a* [. p. L move-turtles
5 X4 f/ V+ h0 @& x" s% l eat-grass
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check-death
# Q2 D* k6 H8 l3 K0 X) G3 } regrow-grass
* y; R5 A. O: s do-plots
% b( Y5 ^% G6 p( N4 |7 T) Dend4 b: s2 w' a) k3 m' g
to move-turtles
2 `1 N- B( U1 c. Q ask turtles [, t% z9 Z! Q# J; b3 z
right random 3600 ?; o! ^9 b" T0 Y. p8 z' Q7 R
forward 1/ b3 x. ]1 d( T. ]3 _
set energy energy - 10 q; s+ h& _. e. K( b
]% f5 H5 c% m# f) y4 {5 d
end1 e- I' `! s9 ?, T* Q
to setup-patches9 H+ m& @ J1 i* `
ask patches [ set pcolor green ] V! |5 d! u/ I5 S/ u2 G$ l
end
% u H% Y7 F& c8 I! fto setup-turtles
- \5 ]+ @ H# E7 w9 m create-turtles 100
3 A8 O' v7 g/ v4 P2 G3 D# a ask turtles [ setxy random-xcor random-ycor ]
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to eat-grass3 b2 N8 E. f! ?, d A8 _$ U; R: n
ask turtles [9 b8 V) W8 m: q6 }5 M5 w2 H
if pcolor = green [( A8 u' O {% T4 \. r/ A9 V8 \
set pcolor black, o0 I5 a8 z: l' u( }" {7 ?
set energy (energy + 10)
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7 Z* V' A+ q# `0 q7 C ifelse show-energy?
8 d0 ?3 G* @: {$ J% t2 ]" R9 [ [ set label energy ]: x% l( v# O) j: Y) R3 l) x, |* q: e
[ set label "" ]
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end' S% ~9 F5 l( z- k2 n G' C
to reproduce
8 h1 E% y. T: x; E5 k4 b ask turtles [
8 K, }. Y8 ^2 O if energy > 50 [& l/ r3 E( m" j
set energy energy - 50
$ P8 I# k: e0 q$ W: f6 A hatch 1 [ set energy 50 ]! l$ v* O; l; W/ ~) `, i" P1 ^8 G: Y
]( z' i- X1 \9 z: }1 v
]
9 N t" ?4 b- p. O% W% Y5 S# Yend
9 q) M. [& Q; d5 Vto check-death
; o) U) e- _( y% u( y ask turtles [; C' w$ @4 G* ^ }3 r
if energy <= 0 [ die ]
4 s& [. r0 p, L: u: B8 ] ]
# T; S+ u7 [) v" D2 ^end( [+ ~0 _" I4 i0 Q; }4 S. q
to regrow-grass+ l; Y& B: i2 P r# e/ O
ask patches [0 z5 _$ Y/ V+ k. p
if random 100 < 3 [ set pcolor green ]
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% Q# x6 s9 p1 Qend
1 j' R2 U D/ rto do-plots2 P- W( A# e/ i# }2 I/ I
set-current-plot "Totals"
% V2 Q9 x. v; K: \+ W9 N# _+ j set-current-plot-pen "turtles"3 f3 V% I- V" Q% _" `# n+ S
plot count turtles
1 D, T( j4 I/ \7 X6 H set-current-plot-pen "grass"
" V7 X3 @( F( y1 I plot count patches with [pcolor = green]. ?5 R7 u0 w) M+ u# L, L% Y+ b
end
! Y. }: Q6 {! [9 g( B, j可是运行时提示no such plot: "Totals"
( t, G- K2 {7 g& Y, ferror while observer running SET-CURRENT-PLOT
6 v7 ^6 e- `9 w+ \ called by procedure DO-PLOTS
. z2 z( n! @: j/ Q; ?1 H0 q called by procedure SETUP
$ X6 Z+ o* U: |8 u called by 按钮 'setup'
! C; b E9 z) E求大神解答啊 |