我编的程序如下turtles-own [energy]
% ]* q+ M8 [& [to setup
/ \/ }5 a* r |4 K+ I clear-all
' j5 Q' C% k! A, e% Z- t setup-patches. I- a$ @' E3 Q6 c8 X* W
create-turtles 1007 s" o0 j4 U4 q3 s) }: n i0 F/ r
do-plots" J n' Y( z. ?6 U9 r
ask turtles [ setxy random-xcor random-ycor ]5 [. ~1 F4 C7 d* E
end) I$ p0 v! G5 O W; h4 `
to go
" A9 l( p, }* K8 E7 ^3 Y' W# b! { move-turtles3 Q% w8 Y, t1 b! g& L. U1 P$ ]
eat-grass& J2 @7 Z7 X8 p9 V
reproduce
' V2 ]3 J- y5 W# f check-death) s* h( r( M) R# b$ I
regrow-grass
% c* p8 U Z/ }2 }0 X. E0 I7 M do-plots
" J/ v2 P" f( a, x# M! M, }end
" B: L, {$ N9 V* Sto move-turtles3 A9 O0 K( Q" z/ K
ask turtles [
. @% S" F- c$ A6 u right random 360
# r! R' Q" |, e' ? forward 1
! r8 s7 g [, l set energy energy - 1! W9 R% W+ g7 h- T6 c! ~( W
]
/ j! x3 [$ s9 g$ \; k- Fend
% T! N. K! v7 ]& m7 N& Yto setup-patches
3 O. R' A6 n" S B- @9 }) C% o ask patches [ set pcolor green ]
. J2 c1 i4 Z3 S# u1 T: Qend' W# i) B+ ~$ I3 G/ n. E' l
to setup-turtles
( V# F3 @: {/ N5 k; p3 M create-turtles 100% j$ g, o8 |$ J) P/ D
ask turtles [ setxy random-xcor random-ycor ]5 K6 ]8 B% E! y$ w1 i* b9 y
end
* k) a2 b2 I& ?/ V; @to eat-grass
. o {- m" Q3 W0 G ask turtles [
- N* E# j- c* _1 ^( n if pcolor = green [
0 N* R4 f; U- i# Y set pcolor black3 ?: m4 C) N: ^. ]
set energy (energy + 10)1 D* }% i0 ^, Y% w1 J
], E8 Z/ w! |( u" W- P/ |! V, j
ifelse show-energy?2 X8 M* d7 R( P4 y3 d
[ set label energy ]' w* r- V: o0 D
[ set label "" ]+ u" E$ V/ x E3 Z4 b/ B, e: x; l1 m
]
1 m: g/ t! F; I4 {8 oend+ e+ r9 q5 W) L1 A( U- [
to reproduce" M5 p% V) f6 Q( x" y0 H; `
ask turtles [, Q. G; z8 x' |9 c& u7 c- |; f0 t9 \) h
if energy > 50 [
6 u3 y3 d. j! o3 S! ?# x set energy energy - 50
' Z7 ^5 W' Q! Z hatch 1 [ set energy 50 ]" B; T. s, M; p! k
]- q% F% R% F. b! J3 A( I. {% K
]. r: k. j( v. a1 w, D
end
( P: [0 s* O/ d! Y' H" H8 Yto check-death; ]; |$ _. ~- X$ E7 _8 Q& U
ask turtles [( E; F G9 f+ l9 O# Z
if energy <= 0 [ die ]
1 c6 k( U1 F" V8 ]: Z! g- H+ s ]( N v3 [" e5 v, g$ n9 B
end
5 I/ D3 W' p* m( e+ vto regrow-grass
8 n0 S1 s7 ~1 z7 `! O1 L2 b ask patches [* z) k7 y8 s( ^4 z" s N3 V
if random 100 < 3 [ set pcolor green ]
$ o n; h( l% g3 c: T ]
8 \. _ f7 h$ D- Fend+ U9 |+ C" u0 q$ x
to do-plots
: _* B* o V# i/ U( ` set-current-plot "Totals"
7 S& W3 ^) ~' ? set-current-plot-pen "turtles"
5 A& ]4 f; t; V( d plot count turtles
3 i3 U5 M* \6 H8 y# b set-current-plot-pen "grass"
3 c9 k; ~; u) d5 t- } ~# ? plot count patches with [pcolor = green]
3 j0 c; j# h. |, hend' ~1 m$ r1 X o* F4 P# q
可是运行时提示no such plot: "Totals"
. C% U) o' V2 M8 Herror while observer running SET-CURRENT-PLOT9 S+ d2 e5 W/ N/ H! g
called by procedure DO-PLOTS
8 r3 I$ B7 I1 t! Y6 c U+ D called by procedure SETUP
+ h9 l2 Y4 A2 ~$ W: _' h called by 按钮 'setup'
5 u3 D" ?1 ^6 g' i求大神解答啊 |