我编的程序如下turtles-own [energy]
, b3 [$ B# w/ v- V3 Ito setup
- c" _5 S( g7 f! O$ e clear-all% _1 l* g% q* x# u2 k+ f {
setup-patches- m, d5 B( e) e; G8 s, u" x! p6 V5 _
create-turtles 100
# q5 ^1 K+ y5 j5 H9 k, r do-plots
) H: Y7 V, }5 h# o: t ask turtles [ setxy random-xcor random-ycor ]
3 Z w3 w; |4 I/ g: V5 ?& B9 E" lend
7 s7 p- l, ?2 }' U8 ^to go
& m, V- R. H0 d3 { move-turtles5 x- v- A! C6 B: b) j. d
eat-grass$ ^* F" d. |7 u5 _/ P
reproduce" E, \# \$ S9 R5 f3 w; ^, s
check-death
1 U; D: I" B0 m( Y" O regrow-grass
3 V: _" X$ ?- s" Y) ~% _' r0 p do-plots
8 Z { K! C- a' Aend
$ j2 J* @; ?% L7 \6 U# _to move-turtles
, `% v& F2 d1 r ask turtles [0 ]" J. k1 N3 ?
right random 360
$ A1 e& ]) I0 C( C* o7 Z, Z( X forward 1
) e9 m" a4 k' T. L set energy energy - 1- u; U6 e# r+ z* K% D( }
]
. U2 r1 L" l) w2 S3 ]end
, d2 [( C: c5 ?0 N2 \" J2 i0 pto setup-patches
, a% R& s5 D m9 Q! }3 L ask patches [ set pcolor green ], N# m4 S/ N, W+ o+ ?7 J
end
# c$ O* t, Q8 n4 q9 nto setup-turtles# t6 T2 M% U. K9 i& t
create-turtles 100
2 U1 u' L& w* } `0 V- F ask turtles [ setxy random-xcor random-ycor ]6 [: M. h3 M2 x% J
end- v" M" Y% {5 k" o9 C- L2 d8 g
to eat-grass
& V$ x5 X! _4 y( f7 W ask turtles [
( |- n( P: s+ U, ^ if pcolor = green [% Q% _0 ^, w) w- b0 v) m J
set pcolor black6 Z" M( M$ h- t
set energy (energy + 10)% [. d( c2 {' h" y4 `% g1 B4 |
]
; q. t. F% H3 z5 ]( y9 B ifelse show-energy?6 i0 @5 c9 E; J) F5 ]" @2 I
[ set label energy ]5 j0 V' R6 r e: V- a
[ set label "" ]) v! U+ ]; V& u. Y
]
; O- f) U: H/ l Hend
; Y7 F- e! q' i" |5 ~( Eto reproduce/ L/ ?$ }# v1 D8 L) j
ask turtles [2 x% a; l6 ~% F c* s
if energy > 50 [' S' U% b% f2 W g
set energy energy - 50/ }9 o0 m8 e* ^; @4 u4 I' }& e
hatch 1 [ set energy 50 ]) S( d f; Q( U: j
]
; n$ o1 m9 p3 e6 S N6 K. v; v ]
6 t# p `; Y4 D: }% n$ d: qend2 Y1 y$ Y9 u9 k
to check-death- p" `: r2 }0 A6 {, M) O! w
ask turtles [8 a- k& k0 K+ I+ m* I
if energy <= 0 [ die ]
2 X- x: ^8 ]8 ]' V) A. ?6 i ]
, s: f/ r" O8 y8 l$ Dend8 K# i6 O8 a7 e, ]0 M- o
to regrow-grass
* c$ @. e/ \0 N) Q8 d ask patches [
, K9 m1 ^3 w9 T. B if random 100 < 3 [ set pcolor green ]: H9 G7 [& o/ {$ i( t, \1 A
]
7 X) R/ N" q8 |: v$ zend
7 T) V$ O4 e2 p! Fto do-plots+ ~# a* R, c+ x" u3 O4 N
set-current-plot "Totals"
7 k% y; a4 W1 x! w. f9 D" Q. Q set-current-plot-pen "turtles". N% u0 o5 T: T ^- f. @: ~
plot count turtles. F, r7 L7 i0 W0 J' D. m
set-current-plot-pen "grass"9 N1 A% ~$ M( I
plot count patches with [pcolor = green]
1 `4 J1 K) q2 g$ E9 C0 send% d3 T7 C! `5 w4 b' [6 T
可是运行时提示no such plot: "Totals"! C0 x: l" S* U1 U* b4 F
error while observer running SET-CURRENT-PLOT/ y. |" P" i: v: c/ l6 q2 j. A0 W
called by procedure DO-PLOTS
* b2 b/ ~5 G5 } s, |+ c called by procedure SETUP
5 f1 n; c4 X3 A; P$ G5 v; W/ r called by 按钮 'setup'
' T- N& X2 N; `4 t1 ?求大神解答啊 |