我编的程序如下turtles-own [energy]
, e9 }' P+ R: S; @) E( H/ ito setup, ?# T$ S7 Q% r1 S+ B
clear-all
6 e& Y: s: Q8 y$ k setup-patches+ B. P4 [' ?4 m+ ~
create-turtles 100* f6 Y% u; U9 T' A/ ~; i0 h2 {
do-plots
% J% v( X+ w1 M2 e, g' b) W7 P) | ask turtles [ setxy random-xcor random-ycor ]
; k* C2 U4 f9 T- \; iend
$ V+ z! s" w; O5 r& kto go2 K6 H7 f+ @ r2 a# k6 d, I
move-turtles3 i" B' p5 H: }4 N
eat-grass# K& C' w3 G5 f- L; P: ~4 J" y
reproduce
2 `6 q5 j! q1 q) ~: _4 t6 X check-death. k }& j W$ a/ C2 B7 [; ~
regrow-grass6 U5 X' K' v/ Y- j" h7 z. T
do-plots. x* V+ B5 L" L4 d9 B' L' S6 [: z
end: g4 _, S1 A( l4 K
to move-turtles* _0 y& M5 w% f( Y% Q3 a2 n
ask turtles [
( L2 r9 w( U0 i3 V& x5 `9 J right random 360% F, ^6 G; o+ S3 e8 ]
forward 1
" ]6 `# w# E' }. j [3 O: m set energy energy - 1( r# j& v% b* j- @* Q0 Z
], g+ A5 C; W7 }
end
* l% k4 C7 t) x Z0 rto setup-patches
, }0 O7 I, ?* F' t ask patches [ set pcolor green ]* N8 r6 s. g1 h1 T1 K. k* i
end
% y7 J8 V7 N- O! o( f( {to setup-turtles
3 Q% e% `" L) y5 [$ z# \5 [$ b( z create-turtles 100
& i4 v3 o0 `9 D$ j; b, j ask turtles [ setxy random-xcor random-ycor ]8 {% S* P# ^1 o) d! c" z; T
end
) W) }& ?1 ~2 K5 X' D: \to eat-grass
* ~, g& n5 R# X8 ?- Q" S, q ask turtles [
: p) ?) |3 s0 A( c if pcolor = green [2 _, w/ d$ p& \! S
set pcolor black4 _' b2 f+ I3 z. h) K/ d
set energy (energy + 10)
) G; o: O! f3 M3 Z. R& n ]
) }3 b* H, S3 N5 j% Y ifelse show-energy?5 f0 p' L: B' a5 j" w
[ set label energy ]
( a; b; K+ G: C$ w6 C# n [ set label "" ]
9 W( P- n# P0 g0 I8 Q- ?5 F ]
4 p( H9 B1 Y$ x5 i) r7 O2 Send
, l: K! \9 g3 a" I1 q- eto reproduce ~( [% p* Y. b) x
ask turtles [; ~5 a+ c$ l( Y2 \( U6 q
if energy > 50 [! {7 B5 Q& U7 w# z6 d
set energy energy - 505 I, `, u: D: w7 C5 O" _& g2 x
hatch 1 [ set energy 50 ]% o- o' [$ ?" u* p- v& ?* w
]
7 h5 L: A/ ^ i3 j ]/ G( }- r o; B2 h% R6 ]% v
end5 G8 V& ]! w0 l' `* X6 M* z# c
to check-death) y0 a! J! s0 e8 n( w7 d. S( x+ m
ask turtles [2 m! [. q$ U) s) v! J
if energy <= 0 [ die ]( x5 P% [7 j5 P# V8 P6 N
]/ V: e: B; S( P2 ^, n
end
" T0 _: P: d6 N0 pto regrow-grass8 x( q9 \1 S2 x: C2 p" i. s
ask patches [! @- ^- @+ _7 I" l( O6 O" Y
if random 100 < 3 [ set pcolor green ] G2 l, n# Z' t& o; `: ]0 b- E
]
+ a" D5 I/ q! X6 q; c/ c- x: wend
2 Q9 d L. h& U( E$ E8 K& uto do-plots1 d; \. I J7 }! @- U
set-current-plot "Totals"$ i4 v1 V2 `! Q. |% h3 y! S N
set-current-plot-pen "turtles"4 @1 E! p& G$ U4 F
plot count turtles
) D, j; [4 O6 a* P' Q set-current-plot-pen "grass"* x) s I: l5 Y3 h# V
plot count patches with [pcolor = green]9 f5 D( V, |$ n+ z
end
: u7 A; Y1 k6 A$ c- I' |7 _可是运行时提示no such plot: "Totals"
& M% S6 Z0 U( D% h- l' `) b% qerror while observer running SET-CURRENT-PLOT9 U3 t) u$ G6 o
called by procedure DO-PLOTS- S5 j# u* q% j! n
called by procedure SETUP; Y( x+ h+ e/ I$ ^! u
called by 按钮 'setup'. E% M% u) ^: r& e( H: f7 o/ z
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
