我编的程序如下turtles-own [energy]" l5 N* r- u4 q, W( b. }
to setup
5 L X* e; {' w3 x0 c( j/ p clear-all: t) T- z7 e! D1 I/ C
setup-patches
! p, C* j9 }9 C: W) R create-turtles 100+ A* Z' | D, X. L
do-plots' ]$ j) S1 E4 B$ w
ask turtles [ setxy random-xcor random-ycor ]
% u* q$ E+ B, y! j& h3 @end
+ M0 U3 e1 K0 L" ~- p5 \to go* ~ f5 w7 }+ Z6 i
move-turtles# ]- J' H3 ~: U% x4 P3 ~
eat-grass
8 }& c* i' J$ Q# X3 V8 b reproduce
( i8 P9 ?4 L9 X/ ^( f6 \ check-death
1 M, o8 s+ ^8 u, d$ R regrow-grass
* c2 [' V! e. J9 }0 U do-plots+ X8 f, M6 Y# T3 A
end
+ a+ J" ?' @: O eto move-turtles1 O: a; B% P% Z
ask turtles [
6 h+ k( ~/ E9 j8 i/ y# d right random 360
" Q1 X. ?& }" k forward 1% Z9 {/ L1 z0 I: }3 z* t
set energy energy - 1
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; S9 a& o2 K2 q3 K0 B# r2 m) T# Nend. }( |7 l9 B$ i
to setup-patches
( E& { B7 K1 V9 V. w7 R3 D ask patches [ set pcolor green ]; P* O y- R3 p; C
end
# u' N% v0 `; F% I- O& pto setup-turtles% c4 w/ [0 d$ z& w i/ k( H
create-turtles 100; N2 T0 G3 e7 `/ H# t
ask turtles [ setxy random-xcor random-ycor ]3 x4 V$ w& V$ U& G" w+ J
end
3 R& t$ m" y- F# Sto eat-grass; K& t& _% \( v1 z" Y0 D
ask turtles [/ L- W7 F6 l% q& n
if pcolor = green [. Z# V6 P m. Q
set pcolor black
7 F- Z: `+ B6 u0 L \0 A$ | set energy (energy + 10)
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5 g) G9 A. i7 a0 W% W ifelse show-energy?0 ^0 @6 {5 U# F* o) Q! t
[ set label energy ]
8 _3 J: a; x. M! b [ set label "" ]
& E( h; g$ J, U+ c; n. C8 z' k, { ]
2 ?" F7 t9 u, k3 b8 r. ?1 [end
1 m9 T+ U$ U9 S& ?8 ito reproduce
5 v, T7 D, v, X- [ ask turtles [! p7 @; E5 X. G9 N/ }0 F0 V
if energy > 50 [# f$ i) \: ]' s) B+ X0 s0 h% u v
set energy energy - 50) j. Q. q5 c. B# Q4 Q F
hatch 1 [ set energy 50 ]: K9 S, j0 B% {- t2 I
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]
7 I4 p& Z8 R5 b1 send x0 _. a- I+ L1 q; |# W& K
to check-death
5 `( r& a3 @2 }0 l3 C0 R6 h. ?' ?5 y ask turtles [( _7 }# \' X; V3 C: d" T! j2 i
if energy <= 0 [ die ]
2 z, K2 Z4 Z! A6 i9 W* J ]
0 X$ ~' ]* @9 B8 q! m, S! O* iend
* \$ m$ I9 x, u6 mto regrow-grass6 E+ k: c i8 E( y# P" r: E y( c1 x
ask patches [& S' k1 W6 f1 o: ?- ?' C
if random 100 < 3 [ set pcolor green ]
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end% U: h# t3 z/ E/ n
to do-plots
' O- c1 ]$ M8 U set-current-plot "Totals"
# t( U5 y) j- X4 A set-current-plot-pen "turtles"
" F; \5 L9 _4 e0 U- I9 t( w plot count turtles# o' d% E' E! v* X7 o9 r
set-current-plot-pen "grass"
! o3 `! X4 q) v) ? plot count patches with [pcolor = green]
5 @9 v; ?3 H5 N% F* S" y$ ]end
. I% H" W1 k: s: V' ?可是运行时提示no such plot: "Totals"
. \; u% T1 ^3 Aerror while observer running SET-CURRENT-PLOT! a E8 b% P% Y% O% F6 z. d
called by procedure DO-PLOTS) z5 X' a/ a3 X% a. o
called by procedure SETUP; Z3 t4 h2 ]! Z, @ a" L4 [! }( L
called by 按钮 'setup'8 h- b0 J8 z1 X6 y) s) J
求大神解答啊 |