我编的程序如下turtles-own [energy]3 x2 d) {/ n( J% A* m9 s
to setup
3 k/ t) w6 j- z5 ^, C7 a3 W clear-all
) d$ B- V" f, L/ Z9 m7 _, d setup-patches
: {* _7 ]3 h; s% ^5 d9 _* X create-turtles 100( u+ E4 ?6 I n: C G
do-plots
- i) z8 u7 `3 M/ ?% U, l# H ask turtles [ setxy random-xcor random-ycor ] ^) |$ H5 X- y. d9 x" H2 j5 O6 K
end0 q1 i; S S( F( ]
to go7 `1 z+ n u% e- Y* W
move-turtles
9 e2 f3 n. \% n; A% B eat-grass4 b4 T* y: ]; o% c1 @
reproduce. A3 m9 t7 e6 E ^# |* J
check-death3 f$ m9 z4 J* F$ C- P- I
regrow-grass, O* ?( e- G* b: Q& |
do-plots
* P( c7 t( ?/ P9 @" Dend3 t+ \5 H% m- t, \2 w# f/ k
to move-turtles
7 V5 o, k; d& a1 c$ P ask turtles [5 i. y, U% Y) O, ?; h! [
right random 360- L, J8 H/ e: Y. s7 G! H: { x
forward 1
' D8 |) @0 k. J1 F4 f4 L# s set energy energy - 11 u- E, } T: c# p
]' ?# `5 i- D& E6 }/ k/ V
end: x8 \7 N6 Z( p5 Y; H6 b
to setup-patches9 S* Y6 `1 I) m: y/ N
ask patches [ set pcolor green ]" j2 y" U) U1 w2 h+ ~3 h
end
* C( y/ }" z' c2 j% `4 u( |to setup-turtles
+ `1 o1 ?7 l' a) m create-turtles 100
/ e( L6 Z) x$ O! d) g4 s ask turtles [ setxy random-xcor random-ycor ]
* Z+ O9 U4 X6 d7 ?end
) Z, A* v: A8 P" ^0 n0 n8 o# Pto eat-grass( R& w! i- q) N+ v: M: [1 I+ B
ask turtles [7 ] A* E! L a9 q
if pcolor = green [1 w9 ]! E, Z( P+ C
set pcolor black
w$ J- m; G, Y8 S set energy (energy + 10)6 p' l" D7 m# H! X
]
* o8 c1 ~" [4 A% f3 j! q& Q. }( Y ifelse show-energy?0 |1 G, M4 B3 c6 B7 |$ @' d
[ set label energy ]0 f0 p" m5 u' k. j
[ set label "" ]" o; _& B7 l$ i5 Q: Z
]
& [) e3 s9 d. M& o& V* V5 Uend6 ]( m. }/ ?( a7 U! ^
to reproduce
& v" G" O/ S. I) h% h ask turtles [
: o8 M5 c+ n1 c. A" U if energy > 50 [, p$ s9 T. |* Q( J/ a% {3 f" A
set energy energy - 504 N$ L: O4 ^2 \) h) X
hatch 1 [ set energy 50 ]- A( i* B+ V# @8 E) t7 |
]
; @- ]- H: N* s3 f5 r1 R. p ]0 |4 p7 }. }( a0 x* K5 e' ?: }
end
4 e7 x I: U% a Kto check-death3 ^: a; W: _$ M5 Y. M6 b
ask turtles [
! D* y" k+ C' ]1 _$ N if energy <= 0 [ die ]
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end
" r/ J" Y" R/ b+ kto regrow-grass
- p$ ^8 S g2 I) x9 r3 n. m ?( x ask patches [6 q; q* t% H0 Z) A/ ^+ j" H
if random 100 < 3 [ set pcolor green ]* M% {, U; g( c6 y( Y8 I
]
3 t# p5 J O) E: X1 a. K5 ~. Send
: Y4 U2 K9 L- J6 J5 ]$ vto do-plots
, E# s* T3 M) f1 Y" m+ s$ l set-current-plot "Totals"
6 G. G0 G$ d% f& B0 [! K' J set-current-plot-pen "turtles"9 b, M, Q/ k1 U, ]
plot count turtles
6 {% p; U( V0 J: d) d3 S" g set-current-plot-pen "grass"/ V9 V/ ^) Z# k" W. T4 v
plot count patches with [pcolor = green]
9 b x s% c$ j2 D) f# J' @+ wend
, k! q3 ^& ]: {可是运行时提示no such plot: "Totals"
( M) `" Z. O$ S3 H! P4 l& x# r- Merror while observer running SET-CURRENT-PLOT
' B: J% @# @% I+ N3 }, L9 j$ z called by procedure DO-PLOTS" G' y3 A8 k6 m" o1 T _' J6 f0 x' \
called by procedure SETUP
) a. Y9 \- {0 ~ m6 R3 y$ O called by 按钮 'setup'
/ [+ }/ k; d: K求大神解答啊 |