我编的程序如下turtles-own [energy]
" n$ h/ @! R2 x$ R3 J/ O* v& qto setup
# ~/ a. a6 [7 w6 s Z" l4 m clear-all
2 z! q' }( e9 ~' |; Z6 h setup-patches
! J) ~% z* S) m. C create-turtles 1002 H) Z9 H$ i K- w% R" h/ ]# j
do-plots
5 y6 O4 j1 U) K) L7 X9 S8 @: T4 C ask turtles [ setxy random-xcor random-ycor ]
* L% z1 h( z# T$ Wend9 t* z- S" ]' m8 F- _' S
to go0 ]' V+ o* W* G. ~# Y8 U
move-turtles; `" m3 v( [/ y+ [3 q5 e, v, M
eat-grass
/ H; ^7 I: k) _ reproduce8 ]& {5 ^# Z7 a' v
check-death
) L7 h2 F: @2 W( [6 E9 y regrow-grass2 k, R5 v/ X5 o7 |
do-plots
: b( l2 C5 Z1 wend
2 C: j1 d4 E, S* n- T- x8 Z2 b, nto move-turtles$ a, w6 E% \& T+ f" d5 N
ask turtles [& U, C6 A+ F4 ]9 F' \. k
right random 360
* _8 ?; f6 k8 [7 H1 j forward 1 D$ u3 F' A) h% s3 t9 y
set energy energy - 1 P0 h, h+ J' c! B- s9 E
]$ N/ c8 D* q: @" r7 f) w9 @! O
end
. @5 \) d! |0 t! mto setup-patches/ {3 \# o; S3 c
ask patches [ set pcolor green ]6 y2 b- X j) N3 g- c, V
end
# A6 V8 ~4 A8 vto setup-turtles
! [9 n% N9 A/ { create-turtles 100
( k6 Z/ J% S) N/ r: r ask turtles [ setxy random-xcor random-ycor ]
& N- L9 H5 d) w" S- P, nend
% T1 ?7 K( u) c9 v6 s+ H1 X: ?to eat-grass+ ~% F- ~" q/ P: @' `, h3 ^' B9 }
ask turtles [
0 N7 t# O, B# C+ D; V+ U' M' e% N if pcolor = green [5 q; y7 S/ Z! Y
set pcolor black+ z% i% L4 `. L9 x1 _" H
set energy (energy + 10)# D4 C% `# w' n% Z @4 s
]
& Q7 L8 X, U6 x2 K+ K7 m0 { ifelse show-energy?% i% ` E$ ^/ C* x2 q
[ set label energy ]: i( s( a; u4 z# o2 O/ f& L( n
[ set label "" ]
5 w9 u& P2 b% f ]$ T% D$ g. }3 }) R) H1 ^
end
2 E M, I5 U+ B* L! I; z. mto reproduce, u7 S- S _3 R3 u0 i
ask turtles [
* o. W$ |: b1 f2 Z/ }! C6 ~ if energy > 50 [' M" ]9 B: V( t5 V
set energy energy - 508 w: Z' C: `8 s8 [
hatch 1 [ set energy 50 ]
# j5 h2 M. e8 r6 Y: c ]0 n3 h+ M7 D: H5 @; c: W8 [ Y
]1 P# l- P# S" B8 R8 p: E9 R
end6 ^' T6 N( O' o+ }7 d( a! W
to check-death
3 c7 I' ?7 _' N5 o ask turtles [9 [2 Y; u5 h# `& j5 u [! b
if energy <= 0 [ die ]
`: S/ @7 R$ M: o/ B ]1 o( c: q* I& O
end1 ?+ b! L9 e B4 G& ~
to regrow-grass
! @# V0 S1 P* R# O) i" h& a- C ask patches [
: S, a1 N6 _0 G e if random 100 < 3 [ set pcolor green ]
) I/ W- I- |( z- z1 \4 Q8 e ], V% C3 C$ o6 q# a
end
9 C" M1 E) P8 ?! |8 Y5 w5 i, dto do-plots
" H4 ]! o1 G+ G$ q( R) T set-current-plot "Totals"4 l! V: H' u, q: c% R1 u Y1 w! |8 W
set-current-plot-pen "turtles"2 S( g/ Z9 l$ Y0 j0 ?. a$ a* H
plot count turtles
9 H+ w2 i2 z7 b4 i* s+ U set-current-plot-pen "grass"/ w _. _0 p' P' ^- f+ ?
plot count patches with [pcolor = green]. [2 A% e$ [& ~) o3 X# {
end
$ m1 ]. t- b4 F9 Z/ }7 S可是运行时提示no such plot: "Totals"
% q u) v* p2 h5 I% g0 eerror while observer running SET-CURRENT-PLOT! w: e' J+ g+ G
called by procedure DO-PLOTS" M: s' V& a2 |% P
called by procedure SETUP
- b. u! D+ A* _, W# b called by 按钮 'setup'. l8 A9 }9 f( {
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
