我编的程序如下turtles-own [energy]
& [: G7 D" Y+ U3 z$ h' v6 @, c) eto setup
* W7 A' O4 S9 \& z; H8 _0 o clear-all* W6 p4 C/ c0 l2 Y3 ]" a3 r
setup-patches4 k8 @* e- B6 l# u. T. n
create-turtles 100
' y9 S7 J* {* t+ d. v" G1 }) ]- a/ _1 m do-plots
: L- O* V# j2 ` ask turtles [ setxy random-xcor random-ycor ]/ P5 z1 Z6 j( d6 D* @
end
6 |4 B& z1 g9 w& n) G1 mto go
! y9 ^/ c, P, N% [' G+ ^6 l move-turtles
! C- L# n& t }- Z6 d eat-grass
8 b8 x' |: H: C6 f6 W reproduce4 x& ]0 @3 S s5 e/ d/ Z
check-death
- g- g! h% K" W9 q% I" f regrow-grass( e0 \; @2 J- v+ l
do-plots! b: n( k4 N* V; k5 o7 D5 b8 N
end1 I9 `: M$ f0 t8 ]2 T3 M! F
to move-turtles( `0 Y6 J5 V+ t O) f5 q/ c
ask turtles [4 T, i8 B y4 j! t* S1 d& |; C
right random 360
- ~* O, w* T, M. }% s6 }5 c% x forward 1
! c, q4 G: {7 i+ s8 T3 `& h7 K set energy energy - 1
# r( A: R4 K# E5 S0 |1 ` ]
* ~+ x% Y2 |3 E8 U! ^# P/ Eend
$ V( x- N0 _3 b3 rto setup-patches
1 q% E; ~/ ^3 x( L. M$ Y( D+ `. J ask patches [ set pcolor green ]
4 Y3 t" a9 `/ x8 g: Rend+ O1 j* Z4 M' z, {3 X& E2 G, s
to setup-turtles
# U( w! f* Q/ f7 [7 C8 m create-turtles 100& E3 z7 j4 D5 M! o8 m/ X
ask turtles [ setxy random-xcor random-ycor ]' f3 F) z/ [9 Q$ g
end
7 z5 B) H. s' c- m' n# z# U* Wto eat-grass! M, R5 d2 @' U+ y+ i
ask turtles [
5 \# r8 T: ?+ H2 b9 J8 F4 E if pcolor = green [+ b2 b( G6 Y0 e* X1 ?2 c
set pcolor black
# J+ {3 n! S; y; k# W; ]. h set energy (energy + 10); x' m0 a" s7 y( `0 } G) k& J" O- e4 R( x
]
) W a5 T6 s: R8 w ifelse show-energy?1 Y5 }# E9 T; @1 K
[ set label energy ]6 @7 S( P) I! n8 t0 U: h4 ?) N
[ set label "" ]
2 J0 b( }% X6 a ]
( [9 w. r0 _( D2 J6 Dend
% A% o' q; l7 H( K: S6 kto reproduce
! D7 ^' V0 A- y6 C ask turtles [- l$ e3 [# X/ o8 k4 L- U
if energy > 50 [
% D9 v5 ]6 H0 `7 ~ set energy energy - 50! b8 E/ q$ v5 D
hatch 1 [ set energy 50 ]8 H) f2 a; ~. a$ P% N- C; B' ~8 j* }
]
5 `. d ^. }7 ~; E% t ]5 W: F# F9 u& l! v6 S4 k. C+ y
end4 F, t* [' t4 s' I2 E
to check-death* X# ]& e, j/ ` n; Q5 V
ask turtles [3 ]( A" g5 ~- k. |6 L. A
if energy <= 0 [ die ], V7 W5 E, r8 V0 R, ?; B3 L
]
, o* m6 G$ F$ a- h M: _end! g5 R9 z( s! ~( u N* W
to regrow-grass. w; o7 m$ \& X* _" z6 |% y
ask patches [
$ N" }, U2 F8 x# o1 @; x if random 100 < 3 [ set pcolor green ]: _+ P7 q- M: h) X d) X" g: Z
]+ v# f& P$ Q% J0 n$ S4 z# X
end
. X! ]1 [/ I4 x) c. r9 A% Ito do-plots# {- i8 ~% m) F& Z* S# S
set-current-plot "Totals"
/ D1 M# s7 x* `+ c+ y& b/ T set-current-plot-pen "turtles"2 \: r- ?- Q- a6 J/ q( ~) E
plot count turtles' _- u1 l$ T8 {# }
set-current-plot-pen "grass" L {7 i$ n0 x
plot count patches with [pcolor = green]( h$ i! T: v a0 A$ N& S
end
* T% p: {4 B9 G5 k可是运行时提示no such plot: "Totals"+ j# x/ F7 X5 Z+ w& P
error while observer running SET-CURRENT-PLOT
* x3 y0 p/ \ L8 Q+ X- S called by procedure DO-PLOTS d6 S" y; e% \, O" x
called by procedure SETUP
9 M: G: ^3 t6 U8 F7 q2 K/ Q called by 按钮 'setup'' ?4 M5 A9 i5 q, }: b
求大神解答啊 |