我编的程序如下turtles-own [energy]# I! m' w, L$ ] W) h/ X9 i1 l
to setup
) S, D. l& H. N2 z+ Y( X# i( Y clear-all
7 d+ S( x t- x: x8 e+ j5 l setup-patches
6 J( `! S! C/ ]0 N# X* A create-turtles 100
) W5 W" x0 s4 ~ ~6 W+ g( V do-plots4 V# ?2 M( r0 C6 b
ask turtles [ setxy random-xcor random-ycor ]
2 a, J. t: O3 {1 ?' V9 ^end, P/ l* w# k" |1 M9 S/ Y6 m8 `5 l
to go
( o0 L" ]! k2 O9 q# G' T2 ?: o: d move-turtles
: J4 _" \, j, F' G) ]1 H eat-grass
! n" E# I$ [% Y' P. h+ d reproduce1 u9 W1 U; I7 `! \
check-death
1 `" y2 s7 ^, {- P* T1 i. l regrow-grass
8 y) D) V+ E! c do-plots T7 M; P# B/ Y* Z+ N+ d) r
end
- ?2 g+ A% |4 K# k2 {to move-turtles9 I! h T3 Q" R) Y
ask turtles [
( Z/ C9 c" i A) P right random 360
8 l: Q& X" G2 N0 x0 p% ?/ j forward 14 r! G$ z: p; I p$ n
set energy energy - 1! l$ m9 V2 V+ Y/ X% Q P: G* [# r _
]
: T p) m$ T/ A. v/ qend0 R5 T( _1 P: G
to setup-patches0 g/ ~& u7 @( a8 P: q: a
ask patches [ set pcolor green ]" U$ X+ Z+ z7 r5 B' n/ r0 R% Z
end
- ]2 W r* f# Ato setup-turtles1 d4 p, `; ~1 R: m) P) r" l
create-turtles 100! q& @, H* _; c& b) Z4 q
ask turtles [ setxy random-xcor random-ycor ]% u/ I1 l8 t% v
end: ?8 b" z) B* z* Q8 `
to eat-grass& E0 D( R$ v8 w& ?9 x3 u+ \
ask turtles [5 H" t: [8 {# I2 A( ^
if pcolor = green [
9 b ~5 K6 O) j, x, f- m& Y* d; I' C. T set pcolor black
) H& U$ ~9 y$ `6 D set energy (energy + 10)
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ifelse show-energy?
( A/ [, u/ q, n [ set label energy ] r3 N9 y& G5 d
[ set label "" ]) I0 F) D4 H' D. }7 S. b
]4 d, X6 w: J- |
end9 q/ K+ \, w8 d1 W1 m# A
to reproduce0 i" r: G0 N y) Z$ h
ask turtles [: B7 c5 P# b b, F# B% e
if energy > 50 [
# C1 p; ?. V& o' B0 e set energy energy - 503 s: e' K- q; W6 s/ V6 ?
hatch 1 [ set energy 50 ]- O- O8 S* b0 F; ?' U. h6 I
]: g$ z* m7 k8 X9 S$ e3 }- u" L
]' f/ z! X3 R n
end* o7 c+ O& F5 @8 G# f
to check-death
0 a! C- \- X* S7 i! N9 U) e ask turtles [/ b! _) q. q, H
if energy <= 0 [ die ]- }9 m4 J1 k- f: E2 f; d- p, ^# u! K* S7 v
]: ~) P3 Z( w/ k9 ?; L) q$ I
end
: _% X4 v: H4 L4 }, b- u/ u; @1 Zto regrow-grass- i. m, m$ x1 P' o7 \) G4 j8 k
ask patches [' Y2 k1 Q! ~/ J" o
if random 100 < 3 [ set pcolor green ]
$ S$ S, Z" z0 [$ F0 B ]5 T" `5 r4 R3 F
end
d: A. A4 f8 oto do-plots* g( g- ]0 T: q: n! m
set-current-plot "Totals"
0 ~: a" G' X" K* f) X0 S( }- K9 ~ set-current-plot-pen "turtles"
/ U( W. D' Y a/ R+ L5 L plot count turtles4 f: a; J+ W% |/ U/ E
set-current-plot-pen "grass"4 P1 V1 p/ t1 \% h6 H6 k
plot count patches with [pcolor = green]
5 X" _ m7 {# ?' Wend
/ [& z, R8 Z/ J5 O/ t0 }0 [可是运行时提示no such plot: "Totals"
* X) l/ T' L; Oerror while observer running SET-CURRENT-PLOT
1 O( q3 G0 X6 O9 D* D- ` called by procedure DO-PLOTS n" U% g2 y/ _) l) e& M
called by procedure SETUP' n# V8 M* N7 e) `3 R$ ]4 V: d
called by 按钮 'setup': P9 | x( H* B5 ^
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
