我编的程序如下turtles-own [energy]
9 \$ N2 V/ s) R2 S( M2 F8 \; bto setup u4 |4 N9 n2 A( s) g
clear-all7 e- U1 G* E d6 O: S
setup-patches5 {3 z! J! Z( d$ W7 d0 }$ K- |
create-turtles 1005 T, G& Y% X `3 ]0 F
do-plots
2 F, z. V, T& Z ask turtles [ setxy random-xcor random-ycor ]
( |9 z1 f. u8 u ~end" V* B: C% p1 P: w8 t9 e& Q; N$ e
to go
. z. G6 q9 N3 ^" n3 S move-turtles
2 k* ]0 X# e! ~/ c1 h9 t8 o eat-grass
' M, A9 [% S- F9 B* [4 | reproduce
! Q. O! L- H+ Y" P check-death3 V% e7 a6 S+ A# g6 A4 n* a
regrow-grass8 d0 K5 u& t0 ?0 _/ y
do-plots4 b* P0 R6 t* w5 M2 f; U M, X
end! j9 l/ Z4 l+ f# M; G0 [
to move-turtles$ ^2 w4 _+ _7 v% U+ y
ask turtles [6 N3 s7 ~' l& @) u1 Y+ c
right random 360
& d$ ?9 h' ?1 ^7 ?% U8 c forward 14 X( _: ^! K7 ? }8 g* c
set energy energy - 1
) Z% M; }+ _. ~1 m: ?9 q) l ]
C6 O4 o1 `8 L; _8 K+ V2 Send
) f7 i$ z- K/ B# C2 @& bto setup-patches
5 b; z& x. t0 n$ E ask patches [ set pcolor green ]: `' l' I+ O' [4 Y' B5 W
end0 J2 n6 K* Y) _) h* o
to setup-turtles
- C0 U; k, x+ J( c create-turtles 100, k9 l. g5 T" }% D
ask turtles [ setxy random-xcor random-ycor ]& Y& ~) d9 M/ ?# |) m% D
end
; R9 M5 ?7 N3 Q2 Mto eat-grass7 d$ h2 x7 Q$ W [' Q
ask turtles [+ }8 }) M: W8 c0 y5 @
if pcolor = green [
9 U$ [9 e ^: ~6 l u2 A set pcolor black
[$ v( l7 {' R7 d0 r# l set energy (energy + 10)
) l$ G f% x$ p/ E8 a+ X ]
6 |3 P2 Y: K7 L( a5 v ifelse show-energy?2 p! W4 O! E! F) g' R; k) L
[ set label energy ]" U5 ^+ X e% S1 r& C, E
[ set label "" ]
4 j3 w* v! B$ P% ]+ F ]
" y5 H! n8 W* T0 l+ @- `9 bend
5 x# h( Y; V/ dto reproduce
( t) b( _; @1 X, p ask turtles [
5 e! Z) _ C+ k% j5 S1 B& E if energy > 50 [
5 n9 _% M1 X1 f* | set energy energy - 508 f4 S: u( T! B2 b1 I
hatch 1 [ set energy 50 ]8 C4 N& j* {4 c( E' c4 ]+ \
]( {4 N7 f. a9 c& a/ y
]1 B3 h0 V8 w9 a4 _5 c
end
/ G9 q, W0 q) m fto check-death5 O3 ~8 x5 O/ G2 U4 `
ask turtles [
5 l0 }. ^- w. _7 K- U! G if energy <= 0 [ die ]
5 j1 b8 E! h; [ ]
8 W D& \* E) q8 [7 \' Rend
# |' l4 r, m" l! vto regrow-grass4 j- d, m' t8 V: T
ask patches [/ c& { L, F- u1 H% j6 C5 e# o/ j" m, [
if random 100 < 3 [ set pcolor green ]8 L, N7 \( n+ K/ j0 a' n) P
]4 z+ X0 v& E1 U& _+ ?/ `! r8 }$ R
end3 y7 {6 L0 H! s5 j! s4 w
to do-plots* s- G& U4 @5 V) l5 G( c
set-current-plot "Totals"
# M ~& y# B! a. Y, I7 W! K% } set-current-plot-pen "turtles"! k$ b4 K8 W9 O4 u9 t
plot count turtles
2 ?' a5 J2 f _5 [# J set-current-plot-pen "grass"
! [: I0 r2 b' b" Y6 e; F( `7 |' @6 { plot count patches with [pcolor = green]
, o8 b8 h$ B. O" Uend
$ N$ M; }) f& K$ F可是运行时提示no such plot: "Totals"
$ f; m/ V! y) k' D2 {# u0 X( M8 gerror while observer running SET-CURRENT-PLOT
! `; e8 {5 t9 L/ v" `! T) n- X called by procedure DO-PLOTS
1 S! V2 Q: n* |, i' T' p* M3 t2 z* z1 w called by procedure SETUP+ e" F$ J6 e1 t. D$ _
called by 按钮 'setup'
; E! a% H m4 M; u6 q求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
