我编的程序如下turtles-own [energy]
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clear-all
/ p1 F; v/ `7 G( L9 V2 Y+ z setup-patches- d% l( g# [ T; E7 q. q6 b
create-turtles 100: T& `- G0 ~7 c' I+ L
do-plots
2 e/ U/ ]! O/ [0 C7 g9 Y ask turtles [ setxy random-xcor random-ycor ]; j% ]6 S: B$ k* x' m0 n
end
3 Q0 P6 c& K; ^! @to go
! i) D# H- ~2 v3 M: L move-turtles5 |: t" f) J% a4 Z, O6 T
eat-grass+ H' T, r8 K4 g. b) p4 y7 [# ?
reproduce+ C- T. l* o- ^6 R4 h
check-death
6 X! w2 C; s6 a4 O' e regrow-grass# u" M8 g" p; C
do-plots" f, C2 Y' m- m ^# H
end
) R7 N0 X5 ~! v5 qto move-turtles
* V+ E% a: {, n$ Q6 i ask turtles [
! }) U' M; j; H+ ?8 R right random 3606 e# E! Y6 d3 R: n) q- e
forward 19 K% e6 T9 T, K l3 z/ @
set energy energy - 1
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end6 f4 G/ m* V5 y0 A( [
to setup-patches
7 r" r5 b* H4 S: o7 [# ? ask patches [ set pcolor green ]( S$ P2 X% D) p& H+ {' S
end5 m3 Y" @2 F9 O3 s
to setup-turtles1 R: o3 X% O3 J* T
create-turtles 100! S" F! [, W Y4 k0 t
ask turtles [ setxy random-xcor random-ycor ]
+ {# M" H: c$ w7 Gend
# U& d) s. P4 s7 g" hto eat-grass# K Q+ V8 n* P ? ^5 \
ask turtles [
0 A& j5 b; [0 e& S8 |' Q if pcolor = green [4 h8 j" I0 o% U' ]$ X
set pcolor black
: u8 D( y' E E2 r$ H* X, S6 Z4 Q set energy (energy + 10)
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ifelse show-energy?
1 `" L) z5 k5 F# h2 k; [2 V9 D [ set label energy ]: A; i& o7 D7 N5 S) l
[ set label "" ]
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4 ` C( r+ {( D9 D* N. z: xend$ _- z1 a; E4 D7 ?
to reproduce
L! I8 A) c% P ask turtles [. b: G$ P# E. ^
if energy > 50 [
1 E1 t) K6 ], @$ G9 N set energy energy - 50" Q" n* W! \+ R/ B$ s
hatch 1 [ set energy 50 ]0 f1 A/ Y4 x# ~( ]
]+ a. O# h2 B3 S$ M/ Z7 r) X
]
3 E" s* H# b, J U, Cend" o% N2 c2 S ^, A
to check-death$ }5 A; h( x V
ask turtles [
0 x1 t5 f. Q( E2 d if energy <= 0 [ die ]
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end( ~/ X/ i% m0 ~" {
to regrow-grass
- h2 N: ?8 }2 T& c7 k. e5 L% M) b ask patches [
' g2 W( r$ A9 n/ l7 d if random 100 < 3 [ set pcolor green ]
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to do-plots b/ x7 \& E3 T [ G; {! a1 }
set-current-plot "Totals"
: n6 Q& { c* X% J4 K1 ] set-current-plot-pen "turtles"
5 \) G! A& ?( E- {3 z6 o) T7 M$ w plot count turtles' ]$ r ]+ B* U5 `" E' O
set-current-plot-pen "grass"
( {6 w( d' g2 l6 k0 z+ d plot count patches with [pcolor = green]
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可是运行时提示no such plot: "Totals". h" ]$ i2 p- n I' \
error while observer running SET-CURRENT-PLOT
' [4 A* p4 w, d c4 `. G called by procedure DO-PLOTS% G, g. ]. j" _: s1 F
called by procedure SETUP# @% M: W: r8 K8 C( W% M" i
called by 按钮 'setup' j( c7 W1 L L$ v. F9 p% a
求大神解答啊 |