我编的程序如下turtles-own [energy]( @4 ~/ u( F8 x9 q& R
to setup
- e% B' a( T/ o4 s clear-all
1 ?$ X8 ^4 P- `! F setup-patches
% Q) A" |7 ~; G+ p create-turtles 1004 a1 W# }& {+ p# W& V. C6 y; s
do-plots
- ^; l8 o) }7 u u E; s ask turtles [ setxy random-xcor random-ycor ]
7 |6 M" D( u8 B' l# a2 `4 \+ Mend/ ~6 u6 S% ?" I, ?3 d; u
to go6 e( H3 ]2 T% q. n+ v
move-turtles
8 L& K) a9 ~) ^# F$ N Z eat-grass b5 L4 H. b. ?
reproduce
& i; h% W! p7 }( L8 O: F check-death
9 p7 m" R0 Z3 V regrow-grass
6 x% R, U! k) ?3 |0 } do-plots
) C$ N/ E" e! }- B! F+ r( Wend
& H2 Q( u8 Q0 ?; ato move-turtles: a' h/ ^6 m4 n6 c0 I# ^5 Q( B" g
ask turtles [
W3 w2 ?7 Q3 o5 L3 o" [ right random 360
3 S- c( b/ T( x* J: @5 |" B* E forward 1+ _+ s# Y; Q5 T
set energy energy - 1" L6 K2 j$ r2 N5 C" V' Q
]5 r/ ]) z& f( T; k: Z
end
. u: L* B: c- f! Rto setup-patches' k7 n j/ s4 z9 F3 z5 j
ask patches [ set pcolor green ]
: m" G+ j3 @1 I; L! send
. s# A' ?7 T! i% K% yto setup-turtles& }* a: n: j( [% ?2 N% y/ M
create-turtles 100
" v7 C8 m n$ B: [. g0 p( @ ask turtles [ setxy random-xcor random-ycor ]
6 w; P# Y/ }) ^5 E* Z) k3 T: I0 bend
# _6 n V7 e" y, `, M4 V; oto eat-grass/ l* Z5 |6 E* R+ M
ask turtles [
! ^0 f+ j. [4 p7 v if pcolor = green [+ ?( A+ H. z y0 \
set pcolor black
$ X y H& P; W, N% p7 } set energy (energy + 10)! I r+ R' T# [" q
]! U. h. y% ]% S6 A A: q5 }" K! }
ifelse show-energy?
+ A% V' U( x9 W( ]" Z% O [ set label energy ]. |8 O, N* u- E1 V
[ set label "" ]
7 C* e7 _0 S0 |7 b* e( m) F ]1 u4 t/ i2 v7 ]. q
end
# I& m4 d+ ]4 w. Eto reproduce. @4 c5 J/ r# Z% K) G7 E5 ^
ask turtles [
! R8 Y! d/ {6 g: c if energy > 50 [$ j, Q% c" r6 K$ ^6 z
set energy energy - 50- l! {* M5 `3 ^# Y
hatch 1 [ set energy 50 ]
8 h R0 n3 h" a- {4 Q2 e i ]
" a9 U: f9 p- C- b ]- _0 I }: ~" F& ?5 ^' F
end
; L, W& ?4 D- ^7 X+ z: |to check-death
! W" y5 i# V* s& v ask turtles [
' [. N: a" Q8 ?- [4 }( I if energy <= 0 [ die ] X" v5 }+ s7 L& |- W+ a; T/ B% i
]
5 }5 J, m8 r% u9 e8 |7 V( J" ?, I. Hend p( {. F6 J) s* m. P: V1 k% T: P! X8 i
to regrow-grass& L; H( Z+ p. o; P+ {- F+ Z4 U
ask patches [1 _! c/ R' v: Y/ Y: j* M+ P6 @
if random 100 < 3 [ set pcolor green ]) T/ o3 \1 m+ c" o. V/ l9 n% W6 k
]
) d2 M" y8 _ dend
/ W) |* O6 E0 I, d% uto do-plots9 [7 [/ |$ `7 R- B% O: }
set-current-plot "Totals"5 n7 a$ z9 a" O4 B. z
set-current-plot-pen "turtles"! P$ w* P2 s' m& Z, a
plot count turtles+ i' z; Z6 V/ n1 F2 O% O: Z
set-current-plot-pen "grass"
( N( T- c4 t1 Z/ d b& _0 _ plot count patches with [pcolor = green]
8 n, S& D) \: C* u P- n0 i8 {end
5 {. @: ^9 d+ y& p& Y- q0 b1 W) z可是运行时提示no such plot: "Totals"1 s5 ~. C% H; h+ s- T1 g
error while observer running SET-CURRENT-PLOT6 v. I$ n9 U- i. v1 o- h
called by procedure DO-PLOTS
2 _# ^/ \5 |$ q2 }( T0 g called by procedure SETUP
9 n2 P9 o7 b, g# W. R called by 按钮 'setup'
6 e# J4 G, R6 f; b; C2 u7 O/ T$ D; W1 n6 H求大神解答啊 |