我编的程序如下turtles-own [energy]* l4 {1 d6 ^; e7 r; Z! k6 G; i
to setup
' ]6 K$ e+ ?+ P clear-all
& Y4 e, E8 u n& q& ~/ o$ _$ q setup-patches
# C2 F& r0 u E. X* Z create-turtles 100
( j' [$ x! `7 |# H$ c/ n2 I5 S# o% E m9 l do-plots
" K" j( u+ J" G; M4 ]% ^ ask turtles [ setxy random-xcor random-ycor ]& G0 m6 |. Y s% L% [
end3 h7 d( I0 S/ t i, k
to go4 @5 s% S% O- \& h
move-turtles) C9 ~3 R8 E N' L- N
eat-grass
0 ]# N5 k; N% M reproduce
( a6 E2 Z+ ?2 j% ? check-death. S, }; s R3 L9 C# Y% z
regrow-grass
% g% Z2 y! ]( Z7 f' A1 ` do-plots
( ~, a4 X+ W0 t; l9 zend- J3 f* v& ^4 L3 m5 _. @
to move-turtles
6 _: O7 a2 B9 ?5 K; G* A ask turtles [ P7 Y0 e& ~7 H2 `
right random 360
+ h, |' D# y% z5 e- B; O x forward 1
, w+ k7 t& Q: j7 a# ? set energy energy - 16 l, i7 Y. P6 J+ Y% O
]
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to setup-patches
: B7 C& F9 D. y7 ~6 M k ask patches [ set pcolor green ]+ D1 s7 \0 y0 ^/ ?3 S) @
end6 i" S2 q' E/ }# Q
to setup-turtles6 ?3 d# C' e/ Y; \* B2 i
create-turtles 100
, Y" Z' P0 p7 g6 u ask turtles [ setxy random-xcor random-ycor ]* n' I8 h9 D$ F9 F9 O& A3 E
end
9 D0 ]7 K: o. P1 Eto eat-grass4 T4 _, K) K, k1 J9 X3 p
ask turtles [! R8 y; B# w+ u: d4 h
if pcolor = green [2 v1 E! Q3 j; R2 Q; L1 Z
set pcolor black# E" ]" w& u0 F& k9 q# b4 Y
set energy (energy + 10)
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ifelse show-energy?* V" J, n( {' I5 ~0 u# X
[ set label energy ]
4 i1 D3 x s3 w1 c* A [ set label "" ]9 G B" I: X/ Y* t9 ^5 `$ W3 b; a
]1 j7 m2 T2 a: n
end
- m% | g2 O6 g8 A. Fto reproduce
" l) N# m+ [. a ask turtles [
) k T4 l3 W- J5 d* ~ if energy > 50 [
9 j) }; t' n5 E9 |0 m2 \ set energy energy - 50
& Q5 ^$ ~8 ]) v+ T( A7 K! K hatch 1 [ set energy 50 ] f+ i2 B5 B# s9 h: A- k
]
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end
G6 `7 V$ J/ ?+ n9 I3 [/ xto check-death
) X5 z- `. m0 n- l1 E: y6 x0 q( O) C ask turtles [
6 m" n; R9 s+ b, d+ P( C* f1 _( ~ if energy <= 0 [ die ]; @- J b4 |' b6 p, |
]4 C. A6 N/ r7 e: g, Q4 a; s2 w/ D
end
# o! B e4 p0 j8 Y: oto regrow-grass3 E6 C, L5 f( v, n$ m: c) V
ask patches [
4 }' e& @: D, o5 F if random 100 < 3 [ set pcolor green ]
! A ~- H6 H$ U4 @ ]8 y/ x% N- O, l; L- G2 r
end: C# v! g- y: Z( }, q
to do-plots
& C1 Z# \& U) H+ e. S! q6 g0 A5 I4 k set-current-plot "Totals"4 U0 R! e1 e5 n) T4 r
set-current-plot-pen "turtles"# p2 \7 h/ ]2 c1 ^+ P1 A' e
plot count turtles
% X- ~8 V2 B% @2 K" Q# ~) F set-current-plot-pen "grass"( b f; A* X8 K( |
plot count patches with [pcolor = green]
+ X7 u. u- Q/ _" \8 Eend
# O: @, ^0 P2 q2 p$ y1 h可是运行时提示no such plot: "Totals"4 `1 y! K Z6 I- a
error while observer running SET-CURRENT-PLOT
( y; Z1 q( _1 } t( c \ called by procedure DO-PLOTS5 {4 f0 e. `, q8 c
called by procedure SETUP
+ t% v3 y U* o called by 按钮 'setup'
5 i6 v5 g7 [/ d, M' q求大神解答啊 |