我编的程序如下turtles-own [energy]( z' q' y. U6 C* O0 K, D! V
to setup
+ |* `3 M L6 x" H5 [" l) j clear-all' a' l+ h4 h. f# r0 [+ x5 I! L1 B A
setup-patches. ~3 Q. \3 m) c1 ~4 d9 C. b& h
create-turtles 1008 o3 ~/ S; m, A
do-plots( T! V/ M- V/ D9 J
ask turtles [ setxy random-xcor random-ycor ]
' q, g% d# j! }5 o3 x$ Aend
9 H& n/ Z. H; Ato go' i+ c/ c r% d; d3 T
move-turtles
7 t( S/ z+ \- d' x) \8 C eat-grass5 G! x V% p9 K; D( @
reproduce# h3 l$ v. z" p2 G. }
check-death
. T' d8 w# O1 @0 U regrow-grass
) N4 d9 N# V: z do-plots! ?9 z0 {, H0 \( _9 x% a
end; g' [" \# {; e- {/ t0 q$ l
to move-turtles2 y- C3 T. `4 T0 B
ask turtles [& w) t6 |2 e. M. Q0 h
right random 360
: ]' G1 ]! S1 ^ w& t" E4 G0 G/ H forward 19 Q6 l# j* n7 B, N
set energy energy - 1
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end2 L, p! D% e% v- e; c5 C; S
to setup-patches5 E: o1 i; u7 `
ask patches [ set pcolor green ]
; b; \7 N) Z; I( ~0 e) F* }: ]end
. m3 J c2 \; e2 e$ yto setup-turtles
1 s; z1 n. y3 e create-turtles 100+ h) [4 ]' \0 `' @; ^ a8 S1 n
ask turtles [ setxy random-xcor random-ycor ]
% g; h* c4 d3 v3 s. O, T1 Pend% U) M# y: p# X$ V3 X
to eat-grass: D9 H$ N; A7 Q( Q- G' H- x( ~ N
ask turtles [8 t. f7 U; g1 E% c6 K* }
if pcolor = green [
6 R' K: j8 `0 [3 `" s set pcolor black* _: ?8 N; `; x. v/ }( E0 s# z
set energy (energy + 10)
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ifelse show-energy?. f* {+ S- ~! ]- U5 E
[ set label energy ]( v- H& t( Q! o9 Z( q+ @6 K
[ set label "" ]3 v$ |/ g0 J5 B7 p, O) G7 ^
]
" e6 [1 U0 a$ `0 Q6 O7 e7 tend
# W4 K5 p) ]- Cto reproduce
0 ?. d7 ~$ O" V2 f ask turtles [
: [3 ]( N9 W! u, a) S, d6 e if energy > 50 [! @3 b8 h# o5 T5 M
set energy energy - 50
/ {# Y6 |! g) ` W3 `# ]( i hatch 1 [ set energy 50 ]
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end
$ w' e7 {1 g) }* q( q: O, jto check-death
+ l# B1 \. J9 u# c ask turtles [( s! C7 V; }) x" p1 r1 N
if energy <= 0 [ die ]
+ ]" c. ]. R w6 o6 f ]( g/ Z ?, N* r/ ]7 F
end
1 k( h* k. Y) Y6 f9 T( N( }# t9 @7 hto regrow-grass
! h3 ?8 J' g9 m. i# c9 Z ask patches [
1 E# x2 n5 A% N if random 100 < 3 [ set pcolor green ]2 N# e8 d: l# `8 X: ]6 R
]
% }' v& }4 o6 Jend
. |# q& Z$ o) g4 |. Qto do-plots; S/ M$ b3 d: S( ~+ S) ~2 O
set-current-plot "Totals"
, {) z+ B) m* N/ } set-current-plot-pen "turtles"
2 W" s7 o8 n; J plot count turtles
, [; c: [" H" ~$ f2 o9 ~4 V set-current-plot-pen "grass"
7 k1 b* w! C- F/ b5 w plot count patches with [pcolor = green]/ b# {& T$ W% m
end
* X; L% t) }/ M% h) t) `可是运行时提示no such plot: "Totals"+ S$ K( B1 s" q. ~- L" T5 Z
error while observer running SET-CURRENT-PLOT
; v5 r, e* }3 t& K called by procedure DO-PLOTS) g3 k) L4 X' ~/ y' v* u: w
called by procedure SETUP
; C! Y1 C9 C& k% t. d6 { called by 按钮 'setup'
- c8 q6 p7 a/ @% i3 v. W+ g求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
