我编的程序如下turtles-own [energy]
- J) a5 b$ |' p% R7 rto setup
D9 o3 E: m* h( l clear-all
: W) I8 Q( K& b setup-patches
]" J' S/ F2 n' v3 R/ q) r create-turtles 100+ ^2 k9 ] Z% f9 I
do-plots
, `" R8 e. Z: P. f8 r! l. S4 n ask turtles [ setxy random-xcor random-ycor ]# s7 x0 M- {- m( E% |
end
) }1 n0 t2 x B& vto go9 k7 {6 W: l3 z) ]9 l
move-turtles8 `, g$ W6 f: q& O% Q* H
eat-grass
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check-death4 p; e- G7 c+ {9 u6 k
regrow-grass" A% B5 O* y, V5 M Z3 m/ `7 Z
do-plots# \- J( K5 _2 U, o3 {: R! \
end; T$ l: ^) ]& `7 I1 I
to move-turtles. C& n. d9 g" r, V" X
ask turtles [
- M! }. k6 S7 f" W2 I) G right random 360
. U1 t0 ^. ^) }. v forward 1, x; C w" g3 H q2 _2 c; D
set energy energy - 11 R" E8 p# k7 x
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end- h+ B+ f. `. k6 S( Q- P8 \* Y
to setup-patches
- W! ?4 g+ a$ T5 W& p ask patches [ set pcolor green ]5 W8 x# G5 ~0 |! ^7 F: P# f5 H
end4 w& K# w y$ J8 w
to setup-turtles4 f; P( s( R$ y# x. [
create-turtles 100
& k1 @+ o# p6 G7 u- L/ E ask turtles [ setxy random-xcor random-ycor ]. E3 d$ |0 a' `
end
6 h( }, m* Q" J1 [$ F( @to eat-grass& c( f* n2 v" T
ask turtles [
4 g1 J' m7 w# T+ f8 F7 W if pcolor = green [
6 x! u2 ^; L3 P! m2 ?3 h set pcolor black
1 n! x6 o! N) Y set energy (energy + 10). P9 ~. i: ? `
]
; s# ^% F3 ?! {( F+ }( B$ v: [ ifelse show-energy?
1 D: e( L4 ^$ X6 W: ]. F% e) r [ set label energy ]7 Y- Y1 j% f, y# R, `' f
[ set label "" ]
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end
) C6 ^! `. s& eto reproduce& H, Y! @) e8 ~, k$ B2 i% K
ask turtles [
" ?( c4 @' N' r* } x9 ^ if energy > 50 [: m: H& P( {/ H: r7 r! }
set energy energy - 50( u" w: e# A$ v5 T3 \
hatch 1 [ set energy 50 ]9 }) \% o* [5 d
]. @3 e: d5 f; r7 t, ^- x: E, L
]
4 S1 o: s4 s* W6 i) xend! H3 h# P& E( B9 M: K0 @, B# @9 i
to check-death/ L- W5 i) l* f) F; Q- Q4 p
ask turtles [" `! x: i% _4 s, R
if energy <= 0 [ die ]
& ]! P0 d' w$ c+ m2 K' F ]
$ a! `+ L! V3 n# Z. |end$ e) o1 \) w: v+ q: K8 Z
to regrow-grass) L0 e0 a9 x$ ?! x
ask patches [. C+ s7 C( T5 r; z
if random 100 < 3 [ set pcolor green ]: r, w( _2 B+ j4 l: ?7 a; `
]
1 R4 b8 r- Q! }+ Tend
& j1 D- b$ g$ f9 Z" m' l) Zto do-plots
I, i$ l0 _1 L8 {% n7 a set-current-plot "Totals"3 i8 a4 N. V' i8 g; l- u
set-current-plot-pen "turtles". z3 D9 ]* D; f4 K& I& S( s- w
plot count turtles2 j" o8 I; ?! k5 }- N
set-current-plot-pen "grass"
/ t4 f( ~% T# V1 V8 K+ @ plot count patches with [pcolor = green]
u( b R& y k! Bend7 t8 m6 j/ q- b8 f. K4 h1 }5 a
可是运行时提示no such plot: "Totals"9 @3 \0 U: n8 @; a2 J' L& f
error while observer running SET-CURRENT-PLOT: v) r* E- ^, }0 b5 A7 ^
called by procedure DO-PLOTS. Q- h* k% W- h2 y
called by procedure SETUP+ V* P1 J: b6 D
called by 按钮 'setup'
7 ^! W: c* u, @% q9 F求大神解答啊 |