我编的程序如下turtles-own [energy]- {# G9 E+ n _ f! Q( G( D4 e, r9 R
to setup
$ k7 k* U+ [# |- J4 M# h clear-all7 M3 Q6 ]8 \9 m* d7 w7 T0 J$ B* N2 X
setup-patches
. [: D+ p$ a7 s create-turtles 100$ O. [0 T( R }$ B5 |" j! V
do-plots
3 `: Y1 T' F, |8 L& f6 q: @+ E ask turtles [ setxy random-xcor random-ycor ]
# M( n- V, r( c' O: wend ]4 ]' A( d, Q6 c3 r! ^
to go
2 g2 A" t* H; l/ O5 I8 o1 E move-turtles
- A7 J, @* @2 @; ^* H0 P S: O( ^# v eat-grass$ I' J& Z6 }* @
reproduce& S+ @( ^+ r! d/ L* J5 t
check-death& G5 H8 O! B1 i* B* ~ G3 C i
regrow-grass
$ f' Q5 G& \5 z3 @/ ~) z6 @ do-plots+ m: `8 ^) y1 Q6 O2 r
end
6 D" S9 u' c7 [6 J) Q }! s% I* oto move-turtles
! D" ^7 ^) ]5 _( { ask turtles [" ^4 z7 E: H# N# N: A
right random 360! H& o3 P- f% W( b
forward 1# y: P7 Q6 o6 d8 H
set energy energy - 1$ _% g1 t7 }" u, e) }
]3 u+ H/ P' w' I% |
end
# ~" C: e( T" T$ T- U) X3 I- sto setup-patches
8 W8 U! G0 C1 N! [8 i ask patches [ set pcolor green ]% r h! u9 G+ ~. |+ [) t
end
! n) y9 h2 I/ _, e/ Pto setup-turtles
, N" x/ a4 t u( M; ?; w* J create-turtles 100
) t3 r3 N* l1 L6 n" g, R ask turtles [ setxy random-xcor random-ycor ]% a( Q2 N1 l( z% M& e0 k
end
5 _; f+ \) i& M/ \; lto eat-grass
9 \+ @1 z5 A8 x4 n0 N, J' T. H ask turtles [
6 l+ E3 U$ @ G, d; J. q) X; x if pcolor = green [' V( L7 i4 P! R; R; {4 s% i
set pcolor black
, G+ q: q. \6 J2 X2 M set energy (energy + 10)1 }, H( _* E% }1 G/ Q
]
; y: i0 }- b( \1 S: } ifelse show-energy?
7 ?& G+ \2 N- M/ U- @3 ^ [ set label energy ]
0 S5 h1 O, e# r9 V3 w. G7 |8 P3 S5 c' Y [ set label "" ]. ^" Q8 u" A* G1 v X3 [" c8 n
]+ H) a/ y w. d- V7 [! f
end7 r; }$ p+ M9 y$ e% h6 T5 z
to reproduce8 W' K& x/ X( j, i8 [
ask turtles [5 O( W9 i1 ?( w
if energy > 50 [6 @; f/ d7 H+ i0 y, t4 P
set energy energy - 50: [9 z& [, z, @5 a% Q0 L
hatch 1 [ set energy 50 ]
' y9 u) r0 j2 X c ]: m% u0 e( v. e2 Q' k a+ P# l
]
3 \. l2 p* W. @0 K6 w. h1 A xend
/ m- L9 t( ^ P) P; P& yto check-death
3 X% |5 F6 t& @6 c+ k9 ^3 g% w ask turtles [
4 D. q6 x7 K! f: `1 h7 F if energy <= 0 [ die ]9 v5 b7 y* `- I" ]( l
]! o. |7 o9 N+ x4 g1 o
end
5 h5 L8 v$ j# `) |- v9 ^to regrow-grass, M( G1 z' l3 z5 R. }8 O
ask patches [
+ }" W0 l7 z8 k* @4 | if random 100 < 3 [ set pcolor green ]
. B( ^5 L% x& q2 Y: T. X9 e' x0 H% | ]# e- v8 s* Q, T3 U- @" k0 O8 O
end \( L: v. t( r& J* h
to do-plots! `$ P$ H: U" {1 m4 I1 m
set-current-plot "Totals"$ e' n2 @6 _$ M: W
set-current-plot-pen "turtles"9 V$ J( R6 s4 p% Y1 i
plot count turtles* L0 w- t3 ^2 K4 c/ D" B
set-current-plot-pen "grass"4 x& _- J" }" K) A% }
plot count patches with [pcolor = green]
3 e; D' F& G- G* i; p2 D4 ^- Fend1 Y4 }" {1 X: o) h
可是运行时提示no such plot: "Totals"
- _2 M; Z# \0 D% {; s, i' Jerror while observer running SET-CURRENT-PLOT, V; t( |! O5 k0 `# e) a
called by procedure DO-PLOTS( a6 `1 n% `& E5 Z# u, C3 p% F
called by procedure SETUP
/ ~) k {( E9 L; P: I( Y called by 按钮 'setup'5 l! U+ E& s+ S( g1 H3 u) G
求大神解答啊 |