我编的程序如下turtles-own [energy]
* M3 X: a$ S9 l% u( |! v3 |to setup1 N7 P5 b4 ?' A4 ~9 F
clear-all
/ _; D5 w& ~) `# |5 D+ I, R+ X setup-patches' _$ F3 L: V! Y! F; i- L1 j
create-turtles 100
9 X9 r& g4 P1 ] do-plots
4 \" r5 q8 n* f w ask turtles [ setxy random-xcor random-ycor ]3 j+ v4 Y9 x0 x o9 Q9 c2 N
end
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move-turtles
7 S3 z$ n4 Y1 V eat-grass
- _5 ?/ O6 {1 d5 u reproduce
, n3 t L! }, R" k Y! f! N# Y j check-death; D6 r/ E4 s" [+ b, X! ?* B6 A
regrow-grass
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7 F+ p m k+ @end
( E9 Y$ N5 H. ~% ato move-turtles
* t+ d* ?3 B8 s; G. J5 ] ask turtles [! A9 f# C$ J: `' b
right random 3601 P0 m, s; S! g0 J! g& k
forward 1, J# ?) k' d& N) ~# K
set energy energy - 1
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' g- S' ?0 i' E; Y) tend
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ask patches [ set pcolor green ]
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to setup-turtles
' A5 W9 F# e! z3 @" i, {7 c" ^; z create-turtles 1008 @+ e$ l) [; z
ask turtles [ setxy random-xcor random-ycor ]! a6 ]$ F' J U+ K
end1 R% ^) X/ b/ c& J \
to eat-grass0 Z- B" g& }, j' q- x0 a' \) D/ B
ask turtles [
! x4 R2 Y. s/ R# v if pcolor = green [- @1 j A- n9 x' R
set pcolor black% |* M1 P w( D# r- V
set energy (energy + 10)
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, Z& s& j7 X0 x: d/ m0 _( o. D3 v ifelse show-energy?7 h7 A9 D- P% U0 D
[ set label energy ]: }5 Y+ L8 p: s' i. ~8 i& K0 }
[ set label "" ]
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end1 ~2 p! A. j* b4 D- L0 [6 r
to reproduce6 `) a$ V- V* u, [" b% \
ask turtles [
5 P. d5 w4 x. C8 l8 J if energy > 50 [
9 m, V. e1 q, R9 a2 | set energy energy - 50; r; y; |5 D; Y+ s u
hatch 1 [ set energy 50 ]) l4 P$ j2 _! y! S' }
]
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8 T! Y! S! A2 D9 {7 y) Pend
w+ N1 R. d& Bto check-death
8 [# D2 S& @% K# U& R* r3 X( O ask turtles [3 V w9 g5 p7 I+ k5 p( W7 T
if energy <= 0 [ die ]
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end& o5 K. z9 x2 x+ P: U& d
to regrow-grass! X# h6 a2 S# @- B4 n( V% B8 B
ask patches [0 P3 v+ J, g! B# u
if random 100 < 3 [ set pcolor green ]
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to do-plots
i# M5 t/ b0 M! i- n% [3 K) C- M set-current-plot "Totals"/ L! y: k9 F& j
set-current-plot-pen "turtles"/ G, i' M8 w5 O7 q3 t3 s g! E
plot count turtles3 ~0 z! T1 C2 p: ^8 h" L9 y
set-current-plot-pen "grass"" H, n9 Z- I# n' z: o4 M6 z6 q$ S
plot count patches with [pcolor = green]
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可是运行时提示no such plot: "Totals"
! {2 c, [6 m; F" f" @4 terror while observer running SET-CURRENT-PLOT! J8 s' e/ D! _9 y! }
called by procedure DO-PLOTS
# m! \8 g) l8 R" d called by procedure SETUP" L* A5 T) ]( M8 R+ Y: f
called by 按钮 'setup'4 f% m$ v5 C' r$ \( y3 Z6 }
求大神解答啊 |