我编的程序如下turtles-own [energy]
: |# B! }; v: X" ^to setup
6 {) j/ s' y4 M- v) N clear-all' F% {9 ?+ U3 v y. `; N0 M
setup-patches
* b# o5 J; {8 Y3 K' e; ~ create-turtles 1004 o0 F" C! F/ Q' B# B+ Q! ?8 x7 n
do-plots
! A6 ^7 }' H6 F& h ask turtles [ setxy random-xcor random-ycor ]" _4 N4 G) w" g% { E) `& x0 i
end
5 z9 Z5 n& W: e. ^7 N5 Fto go5 ?9 R: t! h2 m' Y
move-turtles
0 B/ |% Z5 \, R eat-grass8 D3 M. r+ m; `+ @ g& _' j
reproduce
; R# {9 v g! L check-death. z. _3 G9 r% G7 S$ W+ x0 W
regrow-grass
; {6 x8 F7 t' W do-plots8 c; G; F8 I1 \/ e
end! U0 s2 K+ D' G- y* ~
to move-turtles
( {& c! W2 ]5 T( [6 l& o ask turtles [8 f' n$ o3 v' }
right random 360* ^$ Q' ]- ?. O8 j0 w+ Y" Q
forward 1
7 c6 |& i1 J* n/ ~ set energy energy - 1/ F5 ?3 R9 J' N, t# t3 N
]
% t- g+ T% O# U0 ^) X/ z: zend. j8 ?! W( R# _ F+ q4 R x
to setup-patches
! f4 J( j' k) ~6 d; w2 m: l: A ask patches [ set pcolor green ]
& p9 ~* {: B/ }! r( A8 ]end
3 T) `2 j6 U2 Zto setup-turtles- o5 I5 T; J5 }
create-turtles 100# L* u J/ L; W& V, Z0 P2 }
ask turtles [ setxy random-xcor random-ycor ]0 l" o; }8 V" x+ ^7 I5 u+ A$ I: r
end/ l" [0 N, Y5 x# m6 e3 n7 A
to eat-grass
- s. H0 F3 X( p6 @$ {! k ask turtles [
* Y) }. T# t1 y% V' f. U' p0 b, {; q if pcolor = green [) H% f8 i2 L5 {8 k2 @1 y- e! @: I
set pcolor black
3 b8 M" V+ V P6 K1 W7 m set energy (energy + 10)5 }1 g$ U n/ Y$ ?; \' e& \1 x
]8 F( \" G0 N8 a- W- o
ifelse show-energy?
6 h% ^+ W" @) c. T9 B [ set label energy ]
" w) E% v8 k% E% O5 m [ set label "" ]+ }, |, ~9 G- n; P7 b* e
]" ~9 [9 \/ ^; c0 v$ r/ [
end1 F' x/ C1 p4 {$ p' n
to reproduce. n; L# i- L; \' \% ?) c$ c, y" c, i
ask turtles [& i6 J5 Q( K9 I$ U- {" r9 s
if energy > 50 [
5 N! D* C' h& K& v set energy energy - 50
w% A# v- @& t hatch 1 [ set energy 50 ]
: A; I5 r! E4 V1 D4 F) j ]
2 M& P: J1 n" ]; u4 ` o6 G ]) N- q+ C, L. l
end, O- E- [) `% P6 m, F& v
to check-death1 @5 p# o9 h9 v1 _! \$ r! [
ask turtles [( Y( d2 w. {6 L
if energy <= 0 [ die ]1 ~# {- r2 Q* O2 G
]( N% s6 H2 @1 ~
end0 a+ {1 o8 N8 ^6 @8 C, @/ G6 V- a) |
to regrow-grass5 d q# O! B; ~; ^: h: k P5 \
ask patches [
4 r% n0 q" `, b* B2 Y9 l( F if random 100 < 3 [ set pcolor green ] O/ }$ s7 V4 r, N5 r$ q
]9 ^% @0 r) c5 R$ `# c: R3 c* ~
end, w, T# s+ V, b
to do-plots4 `* a/ ^/ Q8 R$ \$ E7 U
set-current-plot "Totals"
) Q0 _0 L' q6 a E6 _8 |; J4 [ set-current-plot-pen "turtles"
" X! O2 z. P, V9 P) e plot count turtles2 v7 ]' T! s0 z
set-current-plot-pen "grass"
' q% \0 [" o Q$ D K( V plot count patches with [pcolor = green]
5 r6 k: _; W$ n6 ~8 D$ Yend( X J1 L; a8 ~0 M. P- K2 G
可是运行时提示no such plot: "Totals"
- S( e' B, D) S9 rerror while observer running SET-CURRENT-PLOT
) c1 F/ K4 ]# I called by procedure DO-PLOTS
/ l# }3 @: ?# M2 L: V Q called by procedure SETUP
9 O9 Q2 |0 ?2 h9 g8 ^: B" ?- \ called by 按钮 'setup'
- V5 N: Y( W1 ~: F' l5 C# p( }! m' ~求大神解答啊 |