我编的程序如下turtles-own [energy]
& v; r7 v* X/ F' A: u' ~) cto setup
0 Y9 y" g! F8 m* B/ U b clear-all3 I' p/ T) F0 f
setup-patches; B$ R! l ]# c0 i& M4 \) ~; f
create-turtles 1006 W2 p/ y+ ^4 W$ [1 o
do-plots& L& |4 t" [' f* v. K
ask turtles [ setxy random-xcor random-ycor ]
/ B* Y( ]2 T t% z/ Z6 Iend! @8 @: S& T0 l' L$ [
to go
4 J% o0 P! ]4 ^* V& Q4 G move-turtles
+ F+ r( S1 U4 F9 ~# H3 L t* X eat-grass' V0 A: d# J2 K# R p. B7 {
reproduce
9 E5 Y; n& H# D* G& A check-death
2 b. T/ T- q0 ?$ x/ k" \$ d( B G regrow-grass
9 V- P5 j( c, }! C' o- `7 ^6 L7 q/ p do-plots" ~* c2 W) S5 m; Q/ H+ j
end
+ J1 j/ b3 _: O, a; Q% m7 T. oto move-turtles
" j9 ]9 e; z7 {8 u) K+ ]3 w: Q ask turtles [$ e ^2 ?0 z9 e6 n. _8 `
right random 360( @& V% c x6 J2 z. ^
forward 1
0 m4 h: h1 J! e7 ]$ ^- P ~ set energy energy - 1
7 Y# ?8 G3 W- m; i k ]' V E0 P! w& d
end
( m" [' R& |) @: e+ t! Yto setup-patches
0 K" P6 q P v. D, e% L2 j ask patches [ set pcolor green ]
( ]. T' @% F2 e2 z6 Wend
1 E$ ]- p/ P9 ~! T. C% ?! \to setup-turtles, i: ]' L4 r3 a/ A! f
create-turtles 100* S9 i A K' ^( h
ask turtles [ setxy random-xcor random-ycor ]
9 |' b, k, e( y' l, x# Kend
. d: T5 g3 P3 W K d! nto eat-grass$ A7 d! p8 [0 o6 S
ask turtles [
+ M. i8 z" a. J2 C* n5 H if pcolor = green [( v' r, G5 x7 Z8 ]' m3 }
set pcolor black1 N; t! O) O5 ~+ k
set energy (energy + 10)+ u( s- q0 M5 l1 R' X( _
]
) Y* y: N1 ]7 |5 ?% M- C ifelse show-energy?: a2 e) l6 ~" x/ y+ X3 s
[ set label energy ]
+ y( C. n- L }( | [ set label "" ]8 Y c/ \) \3 x4 A8 s; o
]: R2 n/ }) v+ i. R# F* W& d5 @
end
: U6 ~( Y3 ]. q" |to reproduce8 n" T% N1 v/ C
ask turtles [9 J' R4 d) V# g# I
if energy > 50 [
; T& S5 V8 @9 h7 l. h j set energy energy - 507 w; E/ W- b4 C2 F! Y0 z& }
hatch 1 [ set energy 50 ]
6 i% t, m- T" g' m, f$ P ]9 h. r3 N! {: K$ }
]
; C3 f5 e. I5 m) \/ Q; u6 Oend' M- \/ @' a) ?; L
to check-death* \3 d: Q( }3 t8 n/ |
ask turtles [
, e$ ]7 }6 {; a7 r7 u' w1 w a if energy <= 0 [ die ]
( J) r8 V9 W7 G& d ]# L2 d: N/ m r8 n0 |+ V
end W" a# f# Z- h# v/ B, O. z, q
to regrow-grass
: R& U' _5 {) N" I ask patches [
5 |' t; p' Y, `) D+ h8 P. d if random 100 < 3 [ set pcolor green ]
( w' Z2 L/ y( A6 D5 H ]. p, y" B/ ^1 d Y# |; W" b8 A
end2 }" [1 U9 T# j; A# [9 Z5 d
to do-plots1 M5 U4 A0 w6 H. ^- {
set-current-plot "Totals"
& u0 ~: @" `/ d, G' t set-current-plot-pen "turtles"
- i1 d) G& f% @0 A" |6 B plot count turtles5 f, P3 l, [) E9 b, b- O
set-current-plot-pen "grass"
0 j6 o* m5 b8 q t plot count patches with [pcolor = green]
7 W& f8 s1 T# z. Dend
4 [' h# d V) q6 y) X5 R可是运行时提示no such plot: "Totals"
8 L! _4 X. @; U! [) ?6 Oerror while observer running SET-CURRENT-PLOT
" S* [. k$ y* U' V called by procedure DO-PLOTS2 C T4 k3 K; @0 z
called by procedure SETUP
1 \" z+ ^- g! U# G called by 按钮 'setup'
* N1 w: E! c. }3 k! H* l" O求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
