我编的程序如下turtles-own [energy]; v6 m0 K* v& }* w% e- {
to setup
; G. q( z7 }% G$ b clear-all/ ?/ P4 z% c% L! ~
setup-patches
8 C. l' o' l! a create-turtles 100
4 A3 w* K) e5 H do-plots" I# i/ k: Z: ~
ask turtles [ setxy random-xcor random-ycor ]
J2 r* n7 Y! _ ~/ qend" n; K& H0 `: b, d" @
to go4 W1 @$ m* H- Y
move-turtles
, Z8 s8 a ~3 s( W3 g eat-grass
3 z$ q9 S& L/ R( d reproduce
+ v R0 P2 |7 e: y) I check-death
1 I9 J# J7 `8 D2 Q# I regrow-grass( u9 z8 \9 u( c% A( _
do-plots7 |2 P3 c- u/ C" g9 o) c0 f$ z
end
4 B4 m2 U0 d$ S+ O* ^to move-turtles
6 Z' {; L) }/ L' \7 h# p. k& F! | ask turtles [5 d3 ^! u4 m" S0 L
right random 360
$ C2 j: H( d# g7 G, _ forward 1
2 J# u% k+ n" w9 F4 `: E set energy energy - 1
8 H7 x( y' L4 ^2 \ ]
- E5 R( k$ U9 Y8 }! r7 {- Bend
- w& }9 ?: z' h9 G- B4 i1 e* @& n6 \to setup-patches
' }; s% s3 H- y% _$ } ask patches [ set pcolor green ]
/ G1 P6 C7 m5 J1 @. x) b! Rend3 @+ A' r7 @# N% u
to setup-turtles
: R# U6 W$ [; C/ k* q6 L2 T( Q3 ] create-turtles 100
! `2 c0 L( I5 T ask turtles [ setxy random-xcor random-ycor ]4 N) |8 y1 |: z, J y! H
end6 ^: K$ q2 d" P& b
to eat-grass
. w$ _* D. O/ J" y0 H" T' w+ S+ Y ask turtles [
2 D7 ^) N* _* L( [ if pcolor = green [+ V' O( n7 k2 v! H0 c
set pcolor black+ V# Y/ l0 ^5 B" R% H1 C$ @
set energy (energy + 10)0 z/ i- C( ]9 N" Y7 |1 n4 W0 d0 d
]
9 S% J6 c0 b" H5 D- ]# b ifelse show-energy? b& z8 Q( Z& {" w+ t, `8 ~
[ set label energy ]
- Y/ d- X9 {/ X; m5 W [ set label "" ]
, U, U7 o9 U9 i- @, p ]
5 L# U- W2 |. fend' f4 T- u% G: u; c. T# W' ~
to reproduce: _9 D2 c8 x ^& I% x
ask turtles [
2 J; k, _' M! O& a) r1 y5 U% E8 c. \1 t if energy > 50 [6 y/ c6 q( i$ N& G, m9 A
set energy energy - 50
2 r; E& _" K) p: K( S hatch 1 [ set energy 50 ]
2 {$ z/ C# p7 k. u ]
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end
% c' U0 c/ y5 b9 ?2 u$ kto check-death
, ^2 p: u6 P* v8 M ask turtles [
J0 h; m: y5 q0 i if energy <= 0 [ die ]+ E. n0 s: f. R5 j/ w! b0 p
]* ?8 {- l$ [, x9 w! r# P' a
end# `7 R% T8 P2 L: s, W0 i2 k
to regrow-grass" v5 L0 y+ A' w% p4 n6 ]' `
ask patches [" F7 T, ?+ W+ p F
if random 100 < 3 [ set pcolor green ]8 K9 ^/ T* H# ]5 e, y% h* t
]5 Y+ k7 @ |5 Q! @
end
$ D% K# s( m- w c L. ~) |to do-plots
h( {& p6 _- h; V6 ^& ]% |$ g set-current-plot "Totals"
$ M# _0 i' x2 ?, H) b set-current-plot-pen "turtles". r+ o& J* o; o; g8 A& X) A
plot count turtles
+ l) X w8 G+ f2 \. V set-current-plot-pen "grass"
K, N6 H1 E4 r% U plot count patches with [pcolor = green]
: S8 I9 _# j5 c2 e% h- O2 wend
& Z' x3 d/ v. q: Z可是运行时提示no such plot: "Totals"/ B, a- ?/ x3 D2 O+ T
error while observer running SET-CURRENT-PLOT8 |: M& e p4 R' `" G7 l7 H
called by procedure DO-PLOTS5 R& s: g1 G0 w4 o2 X1 q* E
called by procedure SETUP, A R; Z& L& f5 }
called by 按钮 'setup'& }7 ?% r p6 B5 v! z% ~
求大神解答啊 |