我编的程序如下turtles-own [energy], ~/ R; c* L9 d9 p
to setup
; z! \7 m1 v' ?6 w; s clear-all6 Z' P3 P& G4 d
setup-patches
4 @7 f; t/ U0 \8 j9 M& \ create-turtles 100
0 R; K# {3 t. }, [+ I+ e do-plots/ r5 s0 P1 V0 @4 N) }7 u
ask turtles [ setxy random-xcor random-ycor ]4 ~9 `% I6 P, o6 u+ p1 O4 _) s% G
end
+ V! A* |, G. B9 Y0 T9 Y4 ?- S9 j+ cto go. o* R) Y% Y% f! p+ R, j s" h; X
move-turtles/ Q: [" V4 J5 l$ p
eat-grass
8 G" |8 E+ h( U$ {$ f/ B reproduce* Q' i" u( Q' e6 k. k. [
check-death
! Q0 ?0 e+ S7 K7 {6 d8 [+ a regrow-grass9 Z4 Y. V5 k! j( n+ d
do-plots: ]3 W9 ~8 K- r! R6 s) c; `3 z
end
' _: `4 _( F) o! p. Qto move-turtles
. X7 K$ r4 A- M0 W! N ask turtles [. h1 ^3 z, O8 U; |6 d* D# g
right random 360, I; C: g. ]) Q
forward 1# I/ w# ]/ a$ K
set energy energy - 1' a' a. i" e& Q' {* o# W' G- r
]
( q/ g' z L# y/ gend
% j* w# A$ c3 n9 C' v2 j8 mto setup-patches
8 t. M2 m4 D: [. u/ | ask patches [ set pcolor green ]% J H8 B/ {" W$ g3 d. {
end
- G* J8 S" A, O C a/ S% h' Sto setup-turtles1 m' e* p& w1 o3 k! M
create-turtles 1009 G! W; O- e f9 ^3 u6 ]9 {3 O
ask turtles [ setxy random-xcor random-ycor ]
6 m( O0 n* ]+ J# j. mend
5 D0 N0 A5 D7 }( A: q6 a) hto eat-grass
z: Q8 x' n3 q D, F ask turtles [
$ n3 `5 o( _# V: [ if pcolor = green [1 X2 ^4 J4 m! o; M' B
set pcolor black
: Y* Z0 |: e* ?5 P set energy (energy + 10)7 X( {* K9 d. J& _* R: Q
]
6 N/ ^9 r, u7 H2 y ifelse show-energy?! C( T$ l/ R" h& `- Q7 p$ B
[ set label energy ]
4 l3 x$ P5 M' }( P8 n$ T0 L [ set label "" ]7 s2 G4 o9 _7 S6 y0 x+ g) ?# H
]: K4 p6 [( K( c9 O0 [; }; ?! c- B6 H0 ]
end
! Y! i+ \) }, `7 |) qto reproduce
+ V. o+ U! E! W8 ?5 _2 i ask turtles [
( M! A H, r( g" l/ T( H2 J7 k+ Q if energy > 50 [
; g% c4 L% f: v4 b set energy energy - 50* O3 g9 S4 i; ~6 L4 V
hatch 1 [ set energy 50 ]2 P/ _. l7 ]$ m) p% ~/ _
]
, p$ c- N$ @" j4 \9 H. A4 u ]" N: o" \7 r1 w* D2 y( _ Z
end
, ^: B3 T6 c4 g/ w8 Fto check-death
4 R9 Y& m& g- B6 ? ask turtles [% M U( ~0 O f) t' @6 H
if energy <= 0 [ die ]% _1 F, S! H% w1 [: F" k& _
]
& k4 g1 A4 R5 }8 B$ Lend
" ? |9 {6 d5 V- ato regrow-grass
3 t7 X, } D) l) O2 F; Q; K ask patches [
2 o8 }( m" D9 x1 T8 j7 G" k if random 100 < 3 [ set pcolor green ]
0 o$ f9 v5 x# R: J3 i4 j ]+ i. V4 z5 x3 q o3 y2 ~' u1 [
end9 s1 A% x- \0 [" e$ n* M& h
to do-plots
3 Q2 l% C u' Z D" m N; j set-current-plot "Totals"6 s) \ } n; U& `
set-current-plot-pen "turtles"( H7 m \7 M" G# `( r1 r7 w# H4 f
plot count turtles7 ?- E; d) k; ?
set-current-plot-pen "grass"
) b3 {# ~2 X! |. B+ {) _ plot count patches with [pcolor = green]- l; n# G- {5 g; K' e4 u4 C/ f' r q2 X
end! |, \! O" V: z2 _! r( h: o+ K! S
可是运行时提示no such plot: "Totals"% l- \ A5 t" \' v: B
error while observer running SET-CURRENT-PLOT) \% r Y: ]/ w& r, T5 Q
called by procedure DO-PLOTS
, B% C. X3 ]* \9 I- {' x called by procedure SETUP
6 _$ J! W0 ~. q7 u called by 按钮 'setup'
5 ^/ T9 x5 H5 A0 f/ f求大神解答啊 |