我编的程序如下turtles-own [energy]( O% s5 M# `( k. U5 k- a; t; I
to setup& v: u6 v' i& B/ S/ s- p
clear-all" ]# F( }+ k$ [1 b, }% W
setup-patches7 o' L& R: }6 w& K6 }
create-turtles 100; ~$ u2 _- R; V- E. c8 }+ D3 J/ K
do-plots
% V! D! f8 X3 o: Q ask turtles [ setxy random-xcor random-ycor ]
+ E9 V0 B( {+ [4 k! rend% p1 D4 y! ~3 e+ N* }4 ^
to go
' `0 ~+ e& }; Y" }8 J move-turtles
! X0 E7 q/ N b4 |$ Z9 E$ X- \ eat-grass
0 q$ `, |4 M4 E- n9 d0 d6 P8 B reproduce
# w& j; \% P" c( |0 y check-death
d' I( i ~0 w7 T1 ]& Z regrow-grass8 d& [9 d! @8 l
do-plots8 m: Y5 {5 V, d" a4 y/ r
end# g0 R e/ Z8 ]$ b& k; u
to move-turtles$ W- T3 e' C" \4 s6 [1 J
ask turtles [# c5 o9 H* s* c% q) m
right random 360# M( J+ {6 g$ V5 A( \% S
forward 1
+ X# m6 L+ \; t- O8 n+ w set energy energy - 1
' `& N# y4 X% H6 } ]2 q' _5 [* O& d& v8 Q7 K! [
end5 p4 g2 I! ^2 g+ G. ?5 G$ c
to setup-patches& ~8 n* D' ~" G+ B# g8 g
ask patches [ set pcolor green ]
) X: n4 ]6 V# y- \6 Fend# o: _ p$ E. N& q
to setup-turtles
0 d( m4 p' k, X9 N( {: b create-turtles 100
: A; y3 B1 a$ a* A; Q+ c ask turtles [ setxy random-xcor random-ycor ]
! c/ ^8 {( A4 F; ?end1 i2 U' d- r6 ], t) b
to eat-grass
2 h5 `2 `2 {$ S3 l7 q& ^& O+ y# ? ask turtles [6 w0 m6 p& P2 b) s# H
if pcolor = green [
' B# V. j |$ O& u- h0 W set pcolor black* C. j+ k w! s% x# M) }5 N X; f
set energy (energy + 10)9 }9 }) C, j. f, ` ^
]
) Z6 p& ]( ?4 ~5 o1 A0 S6 @ ifelse show-energy?
6 v& q0 ^) E3 Q [ set label energy ]& r6 U( r$ ?+ K- A
[ set label "" ]
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end
0 I7 r& U# C, v( u! Y, n; Vto reproduce6 S% }2 r. o5 q. j' Z% a
ask turtles [
) M3 q# v: x, L6 A$ D7 }5 _, x if energy > 50 [: j% a }1 f8 t/ R- f
set energy energy - 50
) K/ Z2 \5 v9 m) y! `$ Q1 _ hatch 1 [ set energy 50 ]
2 o% o! j& _. b& P- K$ ~: y ]
" A$ s# M+ c, B1 e. [& P ]
1 g$ Q/ w2 L+ Z/ `end
# c9 e) }% T2 \to check-death/ H3 Z. a7 d' m1 z
ask turtles [! _; m7 ^9 m* d5 A& b' K! Y
if energy <= 0 [ die ]
. Q4 t/ S! E8 _% W3 \% e; k ]
/ s4 O ~) t4 V% i$ oend
5 \, ]. \5 [% i9 X4 k7 q4 |to regrow-grass$ B9 m* O2 t& y( t `
ask patches [! g# g( S- Z a. g
if random 100 < 3 [ set pcolor green ]9 s! B/ G8 U$ o! L
]+ m" c) O8 c4 j# u
end4 t! a: K% b6 }% C: U4 S. D
to do-plots
! c- b. K- h9 }& z5 H7 m set-current-plot "Totals" Y8 m) z3 f7 m3 s( B& d
set-current-plot-pen "turtles"0 w5 D* E8 p0 l( c" |( l
plot count turtles' K$ Z/ a" K# p2 h4 E
set-current-plot-pen "grass"
7 B+ j- N) G: ?2 @3 u3 Y plot count patches with [pcolor = green]+ I+ Y; Z4 E `
end
! Y/ L: X7 r7 G& J: k1 R% G1 w可是运行时提示no such plot: "Totals". R+ N0 E' J: ~" ?2 t: w* m5 O
error while observer running SET-CURRENT-PLOT! \$ g/ X7 ~+ n0 G7 u" L
called by procedure DO-PLOTS/ ?4 f( [* i# Y2 }' [# x: c; w
called by procedure SETUP
! k( L+ f9 S& ^5 ^+ C called by 按钮 'setup'
" c# i3 m) ^6 s9 U$ {求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
