我编的程序如下turtles-own [energy] N" s, M. `1 ?) x/ K9 h& J' C
to setup
1 \ g8 Y" Z0 i, p clear-all
( k4 G) b x+ t0 G; F setup-patches! q+ L: W5 }) q& X+ W
create-turtles 100
3 X! d8 ~; e8 N- l% P3 k, }! ?/ j! O do-plots
. `$ F6 W# E3 ?, ?' P ask turtles [ setxy random-xcor random-ycor ]
|8 L: W! q |" I+ Uend
' v% I4 d/ c. A4 I4 Qto go; {# c* D7 e" q
move-turtles
( y/ f; T! ~* D$ o8 N9 o% } eat-grass
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check-death
, I$ V* r) [- ^8 j2 } regrow-grass4 ]) T2 Q: s3 N) M# E
do-plots! y* V* u6 P, D, \2 S
end9 f6 ^0 q0 S* P4 E. h9 H" Y
to move-turtles
7 V2 j/ Q9 D i7 Q: p+ Q ask turtles [
& _7 M1 F2 ?) l( W4 |6 Q7 @% Y0 i right random 360" M6 @/ b0 V8 A4 |
forward 1+ c" w" N1 h+ }! a* ^' R
set energy energy - 1
% b; f [5 f# U" b# w, R" m ]
B/ _; E4 e) f o* uend
! R- ]2 Q; v* v: V! r4 uto setup-patches0 ^1 O" h: o$ n! A t7 z: T
ask patches [ set pcolor green ] Q X+ y! ]' p( t
end8 g6 ~. F% o9 T. _- d+ a( x9 ^$ K# f" e
to setup-turtles1 o% q' q) h0 ~: ]) o
create-turtles 100/ ]/ M" Q+ i4 j5 ?2 ~9 j3 W8 [
ask turtles [ setxy random-xcor random-ycor ]. Q% C. l2 S% f2 _8 i
end7 Y+ q/ I9 y+ _* n
to eat-grass
8 [; W3 ^& |6 B: a3 g) \ ask turtles [
4 Y" }: \- Z! J, F" P) B3 E% d if pcolor = green [! ?& t& j0 L7 q& w k& x1 S
set pcolor black
8 P M9 I8 ~" W% A& R! c& _0 r set energy (energy + 10)
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ifelse show-energy?
! X7 G! I3 K/ n3 y( j9 W [ set label energy ], i& f) x8 l0 ^: N* k
[ set label "" ]3 O: J8 k2 D+ c+ z5 I3 R& @
]
0 d5 o" W$ q. p; u- k T; iend+ W3 h% r0 s9 h1 d' ^
to reproduce/ J/ X1 d+ |4 H6 |8 U# D
ask turtles [0 S: X6 M8 {5 i- h7 g4 j
if energy > 50 [
5 a8 H! \& j: s# i; v% m) X3 \ set energy energy - 50
8 v! y. v: @6 U3 q( |7 e6 C hatch 1 [ set energy 50 ] S0 R+ c, y8 w( q/ @; M
]
+ ]- L- {- p+ G2 C8 p ]
8 I3 Q& G( h! Z' oend
! s1 E; h5 n1 D0 \. J/ K/ F9 X4 oto check-death
5 x7 J1 T1 D; c7 x9 N. S, v ask turtles [- H) l4 \3 H7 { P
if energy <= 0 [ die ]3 O- x0 P( v+ c. x
]
& G& `% t# s- e. gend
9 w; F7 @' z, y, z5 oto regrow-grass
# ]8 P$ I/ s) T+ j6 T: w7 I# z6 ~# ^ ask patches [
# y2 P; a. F" n3 i, p if random 100 < 3 [ set pcolor green ]
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end
% G) ]) l2 f, M7 a' l% V, _5 M, Q* sto do-plots
6 L4 l7 V& @6 ]) C set-current-plot "Totals": M1 s& ^0 @ _+ |4 H0 l
set-current-plot-pen "turtles"4 c, s5 n1 H7 f7 x( p/ D5 j
plot count turtles* `" M1 r J/ I& s; o% L
set-current-plot-pen "grass"
t/ B1 A1 f) Q. d4 V0 n0 X. ^ plot count patches with [pcolor = green]! g0 H) F" E' e0 u8 |8 q& H4 L* u
end
; R% q6 u2 T7 |4 e可是运行时提示no such plot: "Totals"
, `% v4 J2 L) g- ?& r% f8 Yerror while observer running SET-CURRENT-PLOT
5 N0 s& f1 Q8 X @9 p9 \) J called by procedure DO-PLOTS2 M! s% ^8 n: g: }- i& H1 h' O: R v
called by procedure SETUP& o8 c0 ~! D+ s' e/ }( m3 Q: P+ t/ s
called by 按钮 'setup'
/ y F$ E: ^( w; ?求大神解答啊 |