我编的程序如下turtles-own [energy]- U: @$ M/ O) n% |5 m' E, R1 `% q" P
to setup! k0 y4 ` D4 r: [3 I9 J
clear-all- g# A- \8 `9 i, ?) O. x
setup-patches6 l' y! _' r/ Y* h3 t3 ?3 N
create-turtles 100
0 l! ]: x: Z8 c+ i7 A5 A" O do-plots
$ r* A6 ^' E, c8 j# z& x1 P; A ask turtles [ setxy random-xcor random-ycor ]6 V4 \6 t& {- ?; @0 _ s$ N
end
. d" _1 z2 S0 z6 { W# A5 ] rto go' i. }8 |: |. U- G. I3 T
move-turtles
; t' C# b, j% x, C# k _; S eat-grass
+ |* J y2 u; C% v' J; V reproduce% x$ f7 r. B( _. e
check-death
& k# u( O l: |# ~( j' c) r: F regrow-grass
; V+ M; Q& w% F M do-plots
+ j* Y( W/ p! S9 s# \! E% bend+ t7 d K: \$ x
to move-turtles8 H' R l. Y. W
ask turtles [# U* b8 C! W3 ], Q+ C4 v: r( ]
right random 360
2 K! c7 u7 R/ L forward 1' Q" I" e2 q7 E5 n) Y
set energy energy - 15 b( z2 r) _8 i6 f
]
+ x6 P9 h, a+ U8 lend
! j9 \) }' G& Z4 ^3 ato setup-patches. r) I7 j! B% W" |
ask patches [ set pcolor green ]
7 Y4 g1 s L1 zend
1 ~' w- {5 e+ A* ?, N/ _to setup-turtles8 ~- D1 O4 d( I) V
create-turtles 100- \( }- c9 t7 l: o& c5 {/ S
ask turtles [ setxy random-xcor random-ycor ]
5 t8 O. ]# }+ Bend* q7 V1 D" }) y
to eat-grass: g' I! O0 e2 N, j8 G
ask turtles [8 y" L7 T0 e/ Q4 [& ?
if pcolor = green [
2 j- s: k7 U' y, X9 k set pcolor black
3 H2 c5 `& v8 B p4 q" I/ N& H# t set energy (energy + 10)# g) i: q3 B' O |/ W1 n( L
]
: k1 a+ L( u- g( m9 d5 B ifelse show-energy?
- Y9 p9 l# Z* C6 V7 | [ set label energy ]! _: C1 A8 ^( }
[ set label "" ]
. q* H, i+ Y7 b8 y" r ]' u9 d) }7 p# Z
end
( N O2 Z9 G4 Q! y0 ]% \to reproduce
: Y9 l" ~ |% u' q& X ask turtles [! L0 }. |5 Z! B
if energy > 50 [$ z% h, T. R4 D) K& O( t/ a2 \" v% Q; i* Q
set energy energy - 500 T& ]# X" n3 ^' g4 w
hatch 1 [ set energy 50 ]- f" l4 o! w: V c+ w+ A% H7 T
]
* n0 w, q/ z3 W2 ^3 @, c ]
' J/ D, G* j! H( send6 Q% e, A2 H9 b9 \, v* M* V
to check-death% Y# t1 Z; `- F
ask turtles [9 g$ Y, \; |) x6 ]
if energy <= 0 [ die ]
1 Q6 f7 U5 J5 R y5 M ]
# r. K) r3 J( r2 M' d- send
4 P/ T5 f$ x9 fto regrow-grass
* G( t$ ^! m9 \0 I9 X$ o% v ask patches [
2 f4 W& A' y) E7 q7 f& j+ f* _ if random 100 < 3 [ set pcolor green ]
9 m2 X' [ ]+ M) u! N4 U$ g ]' N5 |% s* k. g N6 ]
end( Z) p* k, T" `' q# b* L/ K5 G
to do-plots1 {& F% T; `, M7 m* `* I
set-current-plot "Totals"
8 C; v( l% ^) h7 r' ~+ N set-current-plot-pen "turtles"
% G" O1 G' J# @ plot count turtles
$ n. q( R5 H" V3 K set-current-plot-pen "grass"
3 |) F% S! k1 l6 w( I( \ plot count patches with [pcolor = green]
. p1 I w7 W, J4 Kend- K5 w+ _0 ^! w! R( z3 }$ h
可是运行时提示no such plot: "Totals"
! p3 E* D# a l7 o# X& U# serror while observer running SET-CURRENT-PLOT- m) z6 Q) m( |- ]& }: r
called by procedure DO-PLOTS
+ U' [& _6 l9 n X T ]' d. W called by procedure SETUP
/ Y4 ?. c/ s' ~! s0 e9 V called by 按钮 'setup'
6 _8 c* ?6 `. ]求大神解答啊 |