我编的程序如下turtles-own [energy]# \# \' _" G6 _9 M% |
to setup
; L0 l V/ Q% j8 Z1 h0 M, q: U clear-all% a+ }1 }$ d% J
setup-patches) b% i4 y8 b9 V Y2 P! ~# F$ Y
create-turtles 100% E- E+ `) W' m5 @7 v1 H* O- o
do-plots
/ q' R+ N) h0 D$ z6 r) ], p ask turtles [ setxy random-xcor random-ycor ]7 x* x2 E; X# l r8 h( t3 L; n* ^
end. n/ F; J/ K! ?: m K/ A6 ~
to go
5 ~0 p9 T& J+ k3 I& d7 o6 K, {1 T+ W; B move-turtles
: P+ K! o6 F9 b/ m& h( \; E eat-grass4 _; F; S" z! U( b% W
reproduce
( [8 R7 K' S# } V6 W. u3 M check-death
5 l. O5 r5 V) D- p- Q regrow-grass
2 C! K$ b. u+ s& v1 ` do-plots6 o' o6 b+ Q; Y2 T0 c
end
7 s, o- @/ Y! {& X& l* m& vto move-turtles, _# V: F6 R+ s( v& Q8 n
ask turtles [
7 z/ Y! p& h" m( @/ O# O right random 360
4 O ^0 l, V' k forward 1
! e9 H% c# R1 r, a set energy energy - 10 n3 k# i7 E0 a. z W8 ]) z, A6 j
]
( y. \- Z; k7 w' u4 [end4 ?+ }& | Q0 o4 m' v5 \6 \* j
to setup-patches2 R$ [7 w0 k g4 r+ B: A6 Q
ask patches [ set pcolor green ]) ~: T% ?. d4 K+ ]4 _
end
9 b1 _! k! v: J2 Q5 Uto setup-turtles+ P6 P! M8 k2 f, k' P; `7 m2 w- i
create-turtles 1007 }# `# j& |! L& ^. Q
ask turtles [ setxy random-xcor random-ycor ]
% c# x1 s4 `4 e8 @8 lend5 D. C. }6 B9 L' _% V/ |
to eat-grass; p: x+ t) _) \8 h1 [9 g# W
ask turtles [
" u* z/ p1 u! y/ |+ C: J0 h0 d if pcolor = green [
) ?4 S" h3 r& m ?0 o set pcolor black
- T6 R8 k1 w5 ~- l! ?/ h( W set energy (energy + 10)
8 ?3 ?) R- ]$ k0 ? ]
5 s4 ]; o; @& E* [& e% n, E2 z# y ifelse show-energy?7 z) k5 m2 K y! P, j4 T/ w7 x' U
[ set label energy ]6 d) ? k" U) r& f* A) L
[ set label "" ]
) R# {/ C' R) f' v' B ]
% o8 F2 h0 `4 L. Rend: J/ x; `$ C {7 k( y
to reproduce% N0 M8 S/ w7 t" j& `( }) A
ask turtles [
" M2 n" H$ H1 T' S/ \% ~9 F$ ] if energy > 50 [
4 K9 f- f7 }# Y7 |! v, n h set energy energy - 50
: c' c) Q7 M* U' p( I5 s hatch 1 [ set energy 50 ]
) p. n' b3 R$ }# s ]+ }0 k9 g3 z8 x7 \3 T' o
]
2 W( `! x+ y: H) H) C/ n# Jend
' ~9 ~5 N7 L! M- rto check-death
+ G) F9 k- Z+ `7 c' L' e. K ask turtles [
3 O1 }. ~; s/ A( P* ^6 f! @ if energy <= 0 [ die ]
$ @; b7 D9 [+ M6 B- K ]
( W1 ~/ T, m, z, f5 \6 }end! i+ M& {. G% i( p+ @* f9 v/ q) ~
to regrow-grass
! ~' g8 i" {2 D2 n" _3 z ask patches [2 j4 }& W$ D: Q4 I
if random 100 < 3 [ set pcolor green ]
3 ~0 G5 l. H7 `* y6 l ]
4 m. _, B' `" Wend
9 {# J3 C6 [. O% ?to do-plots
' K* H1 c9 |0 t3 a set-current-plot "Totals"6 z0 s0 [5 `3 I0 r/ D
set-current-plot-pen "turtles"% X: s4 ~! b& M+ e* C3 v, U4 o
plot count turtles3 r3 q6 M: G! w- [4 d P' O
set-current-plot-pen "grass"
- g& w j+ n8 {" L7 U1 y, G& [ plot count patches with [pcolor = green]3 M* O8 b4 G2 d
end
6 H2 s+ h( u8 m0 X% [可是运行时提示no such plot: "Totals"
" ?% \8 L7 O8 P' ]+ ^error while observer running SET-CURRENT-PLOT: i! n/ Q$ |" s# Z. o
called by procedure DO-PLOTS f$ f/ _( K0 s- L2 D1 ?
called by procedure SETUP
: `; J' w/ F% S called by 按钮 'setup'
& U- b# M1 i0 d* h9 X求大神解答啊 |