我编的程序如下turtles-own [energy]
6 W+ F' f+ W, S5 U/ Y. Eto setup
, }9 I0 n! c' @% d( ] clear-all
" o* \ y& R6 y: E/ t) l* ?3 U setup-patches
$ s2 u( A! N. m$ f+ S. i create-turtles 100% q* s; P. V( j. C$ b! W. T2 s
do-plots m2 ~% T0 O/ B- I- m& C
ask turtles [ setxy random-xcor random-ycor ]
- k0 }6 ^8 N {6 v. {end
* `: |2 }+ @; Z9 I! [6 Jto go
) z) _( U. Z3 D. l m( r! t move-turtles
0 H, ?; ]( l9 f eat-grass4 q. K/ m' w3 U0 O3 ~/ r
reproduce3 p$ c& C1 ] z; \
check-death3 W( n# |( I: k
regrow-grass
w! l* l9 i$ I F7 H4 \! R do-plots
+ e( D& C _" vend
% v3 o$ G( k4 h% G" ?to move-turtles% k- A1 {- u4 }4 }
ask turtles [
2 b4 o3 }! J# M7 M right random 360+ c' q* o0 \, Y5 k, K3 g
forward 10 e; u( O; R1 M; p
set energy energy - 1
( Z. k# z) E+ m ]
/ W! N2 I N% ]2 Z. P& X3 {end5 i& A" t4 A2 k! \' \; L
to setup-patches4 }2 ~8 K2 e& D- x J
ask patches [ set pcolor green ]& r" Z7 n5 q% R* I1 y
end
0 p. k4 n0 h5 o" M0 n% hto setup-turtles
: _6 X# k3 y. b0 U: ~5 ]8 U create-turtles 1004 H w6 ]0 D( t2 P; r" C7 ^5 T8 g
ask turtles [ setxy random-xcor random-ycor ]
" i9 K% y' E, A1 q' }end
( j, ~! S, j! zto eat-grass2 E0 j t% c& m$ h# x* A
ask turtles [1 r& ~# a; @% Q ^" X; l
if pcolor = green [- l: L9 a+ o( o1 w. _. l+ o* r$ @
set pcolor black2 ^/ [/ d. U; f
set energy (energy + 10)
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ifelse show-energy?
8 d' Q2 N4 E7 a2 H4 H% V D [ set label energy ]
3 A# l1 E# P* K& H3 `4 @ [ set label "" ], |6 I2 J+ D2 ^4 Q
]+ C) [3 S$ E; w6 @1 A
end6 n' X& e& |9 U | R4 d
to reproduce c8 e5 i* i; V% I1 Y4 N
ask turtles [
+ W. Z2 a+ S" d2 n0 B if energy > 50 [+ G0 i% t6 w3 i' S' U. o [! H
set energy energy - 50
1 p. j# ?# S6 V4 ?5 ?; e hatch 1 [ set energy 50 ]1 |. F. z( z6 b
]; ]8 k$ K( ?+ l. z7 K* M; _
]
3 `; l- }) o! {end
- c. u: ?( o. E- c# @, E6 K6 z% yto check-death: [2 _% n) o0 X5 T8 i' v I
ask turtles [& S% b+ @1 Z# B6 m9 O
if energy <= 0 [ die ]
, L5 i5 o& m& x! { ]5 |" b, q1 e( @( Z+ K
end( z* |- y8 |& f6 u7 P2 V
to regrow-grass( H: L, w8 B( a% b$ N$ ]
ask patches [
* t& F! }' A- K; Y if random 100 < 3 [ set pcolor green ]
" D4 ~; W; ]( c+ u& N2 X' I ]: |7 }6 ?7 @: u, F; W* x
end
4 r- Q1 p+ H% @, \ Z, _4 Cto do-plots
+ s+ T! x6 X1 L I; \0 n* [ set-current-plot "Totals". `$ S' Y1 I! x g# R+ f- d$ g
set-current-plot-pen "turtles"
. @2 T Q) c. @! M& _0 q2 ^8 I. D plot count turtles
/ k0 N5 T5 V l7 C set-current-plot-pen "grass"4 _* T$ y# N' [3 c
plot count patches with [pcolor = green]
- Y$ |" V6 Y3 d5 ~0 K2 Q ?) wend
& G( [6 E! M7 c4 C可是运行时提示no such plot: "Totals"( @( I/ G' W+ r
error while observer running SET-CURRENT-PLOT; I- z( J4 e( A7 u7 Y2 a/ i
called by procedure DO-PLOTS. T- V. b% @1 @0 Q4 W" F
called by procedure SETUP+ T; z' L- f- s$ F
called by 按钮 'setup'
. B8 m6 y% ?0 s3 e) E- [- [. }求大神解答啊 |