我编的程序如下turtles-own [energy]- h K6 F( X" z, b$ ]
to setup' ^" O0 _0 l: N7 I5 w
clear-all
/ ~9 J0 z0 `' x) W- ~ setup-patches
, w. y2 d/ g0 x create-turtles 100. j; r/ @% K6 L4 \4 z q, K/ r2 x
do-plots
+ W1 M9 H0 }: U( p5 F' W4 k ask turtles [ setxy random-xcor random-ycor ]" @1 S: @ D$ U4 I5 D
end- M% q* \! m& J' f5 s$ [7 x6 v
to go
7 q E) z6 _* v4 ~5 C8 F% J move-turtles' h4 s/ v8 B) X5 `& y( s
eat-grass0 k; S _- q4 `4 V& s6 n
reproduce3 l E4 M+ p: d/ v: m' j( w
check-death
- r9 w' @% N/ g! |# A J5 }. N regrow-grass
3 D/ Z4 t0 t! I }0 F! d$ J do-plots
) @# z, o& k! @4 r% @) Pend
- D& L! [ s% i! Dto move-turtles2 x Y3 I! u2 V# B
ask turtles [, t6 X2 \: S6 T0 W1 }/ R( f
right random 360* q8 ]* S. w Z$ S1 u3 @: u
forward 1# `7 r, S# G* W9 c1 b8 v* P
set energy energy - 1
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end, m' N% K" e7 c6 p, ?% h/ B
to setup-patches
' l# B O' N. \ ask patches [ set pcolor green ]
( i5 Y' c5 o0 t. Y2 s1 s& n( {: Send) o) O$ F) ?) t$ \9 i
to setup-turtles
6 [. r8 {! q0 Z6 | create-turtles 100
+ O7 `7 V, ?% ]$ |' Y ask turtles [ setxy random-xcor random-ycor ]# ^- [2 O0 G. G; \
end
9 V- e0 Q. I% {/ v$ O4 S q2 Uto eat-grass
6 e( y8 p0 D% T# Q+ i- v% ~ ask turtles [/ A; w, Z9 a5 z3 r/ p2 g$ k! B
if pcolor = green [/ Q) G; R1 y ^% ]! @
set pcolor black
* h8 w- h% o4 O }# o r! _( X set energy (energy + 10)
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ifelse show-energy?
" ~* p8 V3 h+ y7 H: k2 i8 T [ set label energy ]
5 S# b, I0 o$ o( J [ set label "" ]1 B3 q' {8 }" d- A$ p
]1 h% i& f0 x3 b3 X! r" D6 k
end6 b+ @- j" M' p1 A7 }/ K! c) v
to reproduce+ n0 x! d" i' S2 g; U8 n/ ~
ask turtles [" N" f) o( l) C& Q6 E1 _9 z
if energy > 50 [- w F- o* W8 Z% H
set energy energy - 50& W( }! ` Z _' B6 T5 ?
hatch 1 [ set energy 50 ]
p6 A5 w& H9 `" ^% e$ V- T9 E$ b ]
- a. c$ x" J! T, u; a P4 L ]7 l5 y' [( l# A' E% P
end D M2 ^' b# I
to check-death
& U9 z" \; R% o ask turtles [/ [% [& |5 y# }4 V: p$ F4 b' k
if energy <= 0 [ die ]' F! O$ l2 f* H2 x; ?
]0 P0 p/ Q, V* T% I" I" p
end
- X: j! C, l) J: |! j, V6 Tto regrow-grass
) [5 ^$ C6 q6 v# r; m ask patches [; k( K! c5 a" m
if random 100 < 3 [ set pcolor green ]
$ t1 t! c0 `& Y9 @) D0 ` ]) X% E" j* \$ y* y
end
2 z1 ?8 L4 B/ ^+ _ D: R" Q7 f }to do-plots' Z7 E- @ z$ a( C# c
set-current-plot "Totals"
7 Y8 _+ q) v+ R# z3 ], |8 V6 {* f8 T set-current-plot-pen "turtles"
- O* n' _6 C4 B' W plot count turtles
4 h$ F$ D+ l( q( A; u! Z5 Y set-current-plot-pen "grass"# s! I6 W. T' R ^3 b; a
plot count patches with [pcolor = green]. }/ z5 M* {. h8 G
end
4 O) B7 U; z: K7 l/ I可是运行时提示no such plot: "Totals"
/ |8 v) H! ]& q$ Werror while observer running SET-CURRENT-PLOT6 a) U+ W" i/ r: R+ K" _
called by procedure DO-PLOTS
1 X6 |# u2 E: p called by procedure SETUP. j# ~1 \2 o0 e: O# Y/ U, Y
called by 按钮 'setup'* ^$ s6 u G/ O) j5 _
求大神解答啊 |