我编的程序如下turtles-own [energy]
0 C; s/ O! n* ~$ C+ zto setup
3 J% j/ t; p U8 }$ Y/ Z clear-all% b: Q; |$ m9 k2 J8 ?
setup-patches2 c1 D6 v! ~+ s0 }/ c% b8 q9 S% @: i
create-turtles 100
p( `* S. _1 E/ G do-plots9 c; c7 s- x! z* l! F5 X
ask turtles [ setxy random-xcor random-ycor ]
8 ? R8 i2 A7 Y' i+ a3 O7 Rend
" i: o! a& P5 a: m, Lto go
3 `8 B. e8 t$ r move-turtles
) b6 k- B1 o. m8 u$ s eat-grass
9 K& d) l8 a g) m3 Z reproduce. Z1 g. N# u) t$ o6 r
check-death/ J8 z/ S* ?5 y# P8 G# k' g
regrow-grass+ W7 t, h r" g( U
do-plots! f8 r# e; E/ c( b3 I
end
& p! Z. b5 N# fto move-turtles% ~3 ~; F0 [, V7 H: c3 k% {
ask turtles [) b6 m0 j- d6 }6 A# k8 N" |
right random 360
% V9 \- I& ^$ Q; q! L, [! | forward 1
" \* @" k0 Y \6 U% ]8 X- V set energy energy - 1, C1 k" D/ S; `% o P7 ^ n1 X% u
]' Q5 j' F9 |: x) t) G
end
6 T6 e3 o! j/ U Y" Sto setup-patches& h. k) M- `" u! W7 d3 U! \5 P
ask patches [ set pcolor green ]2 u! w5 z/ J( X2 k4 |
end7 K s, Y P# t \6 Q/ x
to setup-turtles
1 r& L! m- U0 o( M+ z create-turtles 100
/ D2 z* w/ v% d4 H- A }6 b4 b ask turtles [ setxy random-xcor random-ycor ]( \8 k) T* p3 V8 Q7 y
end4 z( C7 F, ~& w
to eat-grass
) l" t+ U+ u- h$ p: x$ l% c ask turtles [
) t* y2 Y( h+ l* d+ z; A9 _/ Y if pcolor = green [
5 O1 @& e7 V8 q& H3 z$ S* U, } set pcolor black
! i+ k4 `; {9 O' J4 {! F set energy (energy + 10); x& q" e% }5 \
]0 A1 H6 p& f0 C2 T0 ^
ifelse show-energy?
* b' Z- }2 S! M5 T* g/ A4 Z [ set label energy ]) K7 s2 J ^/ z2 t
[ set label "" ]
( }3 ? V% W8 ?$ m9 { ]
) Z H, }( c* M( P8 H6 C7 j: eend$ [ v9 M' t! @* x' f* z# n: ^
to reproduce, n, @1 V; }3 |+ C1 ]
ask turtles [
5 F( ]+ ~; D/ n( n2 y if energy > 50 [% g6 E5 Q3 _" F( G6 r9 ^4 q
set energy energy - 502 o, M' }! v& u
hatch 1 [ set energy 50 ]7 ^3 m0 E% s8 f& A+ ~& t. T
]7 u. p1 m* w0 @6 H
]' ~ `- ~" F/ S$ @0 x6 s
end- m* Y# W6 c! B, V& x+ V/ j
to check-death! F n7 M/ Z! b: w
ask turtles [0 M; B4 ^$ p2 t* M6 t0 D8 @
if energy <= 0 [ die ] c5 g; T6 r0 y ]7 V# R
]5 {+ g- X; n1 t' z6 ~
end
! {8 c2 B( }# L( _to regrow-grass
" @7 D. }: i& ]- {9 [9 {/ ]$ L/ M8 W ask patches [7 r Y# i" A2 {9 X |* `
if random 100 < 3 [ set pcolor green ]
5 T' y {3 k0 l1 D3 H' { ]* t; V+ N2 G# ]9 q
end# O8 @" D' Z" Z! ^6 ]; ]7 k
to do-plots& \6 P" C" U* i% l; N5 i
set-current-plot "Totals"
: @0 ]2 J# m! { set-current-plot-pen "turtles"+ B) H: I' y9 r$ x$ R7 r4 k" g
plot count turtles
% ?* x. g1 P* G) v$ m7 ^ set-current-plot-pen "grass"
1 |5 a: ~- W' u9 S4 X, s h plot count patches with [pcolor = green]
9 S( A$ A+ x5 z6 ^/ j% |5 k! {' xend
& x5 C/ V7 h( y2 Z2 l" x' g$ ]/ F* B可是运行时提示no such plot: "Totals"
, t& p$ @1 |, lerror while observer running SET-CURRENT-PLOT
! h8 G9 C( @) |1 E$ n& y called by procedure DO-PLOTS3 }. ~: G: V. w
called by procedure SETUP6 V5 c$ |9 \. U$ B. C7 i
called by 按钮 'setup'8 E0 Y: u7 B0 h, y
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
