我编的程序如下turtles-own [energy]
E1 A- O, O6 Xto setup" ^5 Y, ^4 ^" U" k6 j5 O
clear-all) a" w: Z+ N$ I- |$ K
setup-patches
# G! d- s5 A& z4 q create-turtles 100
) A7 C: n: c6 |9 _$ ]* K% w$ V do-plots$ Y* ?, K4 H5 Y" z7 {( @
ask turtles [ setxy random-xcor random-ycor ]
: ~8 S- C) |: f( }* Lend
% O' o* g/ a; R, ^: uto go
" \+ c6 P u9 o% J( ]- D move-turtles
c, `" R* q7 C7 T+ @& ]5 i d eat-grass2 h5 h3 Q1 b |' X% X% \6 _
reproduce
! u+ w, e! [" h* \, x) I; ? check-death
+ d$ x6 w# z; k* t9 f regrow-grass& k4 f) e5 A2 `& _6 p& K. B1 O
do-plots, m- H: W, k/ o( C% J
end# w& K- ]' {" m: `# f1 h
to move-turtles: x) O) g' t( g& _
ask turtles [
, d% T: h9 p' c" m, _ right random 3603 K- r5 J# U# ]1 g6 m8 u
forward 1
t2 `5 \% U2 P1 x w set energy energy - 1
1 q l/ x5 K, J% }5 ?" s* S3 x ]; S5 P9 V, h: D, Z1 b4 @ u& D
end
, P. Z5 e. B# b' F. ?/ d2 O% h- ~to setup-patches
0 b0 {3 ]& d! q2 T# y ask patches [ set pcolor green ]
9 k% e$ ~7 o; l& h: j+ Yend X0 u. M. [, S% n
to setup-turtles
! h' X+ w; s5 t2 X7 Z& l create-turtles 1009 U8 d# l" p) Z9 c
ask turtles [ setxy random-xcor random-ycor ]. N7 E4 Q, ]8 I
end$ {; j" {! @8 o+ o2 v
to eat-grass
3 I. ~5 H+ x1 U6 p8 r ask turtles [5 ^* g( c# L I7 j1 y/ f
if pcolor = green [) w2 u9 ]6 g: Q; W) |
set pcolor black
8 V( Z) Z+ c) S( H: u: U5 ?7 N set energy (energy + 10)
( w' s5 B% h' o+ L" Q ]
: e( g2 x. D1 d/ a ifelse show-energy?
) }$ W6 f6 U* f" I+ S0 s) M! R- M [ set label energy ]& o' n. O. J+ }8 Z6 g. L. ~
[ set label "" ]
& L& m' V/ ]$ j7 a, b% i ]
4 A( ^1 O% u+ A; c6 a3 }' j1 Nend
3 k/ Y, P' n. J* t" n( |" @" ato reproduce9 U7 r9 A9 A: p( E/ k. G* f& \
ask turtles [
# Q+ z- c: W" c3 G3 ?0 v if energy > 50 [4 e; p! _# W' ]* s7 h6 \) H
set energy energy - 50
/ a! _$ w+ H* @# W2 Z# B9 A ? hatch 1 [ set energy 50 ]
6 t+ \# ]' n. C' q/ w2 n ]
4 @' u3 e0 n6 E) `) A ]
' y( N, J# w. b: }8 ]end
! z7 o7 ]* a0 G, Nto check-death
H+ u! `- Z1 ^# u4 n2 M' X; P+ z ask turtles [( o/ l' [6 ]+ O0 t) L5 |/ Q
if energy <= 0 [ die ]' O% b9 E/ D4 m
]( v( B' [9 v8 H3 `* n" E
end2 o# `8 |9 ~* Y( n/ U
to regrow-grass, }: G% M* l! O
ask patches [
# M3 u/ X7 Y! o3 c$ y1 p if random 100 < 3 [ set pcolor green ]
. F# U. e* Q9 m% }, L ]
! S0 B. R; C' f! send* d/ |; L& m! M3 d; B0 e( L
to do-plots
! p1 @9 o( ~5 J4 w, U set-current-plot "Totals". L ?* n4 V7 ]: m
set-current-plot-pen "turtles"
2 c1 B8 f3 l' }6 W) ^8 |' q3 T; Y# w plot count turtles; t, t5 S/ J% e5 f
set-current-plot-pen "grass"
4 L+ m0 E6 D5 h* e, ~ plot count patches with [pcolor = green]6 [/ s/ N7 W8 x
end$ T% t$ @! O' M5 e3 P9 D- y( D% v
可是运行时提示no such plot: "Totals"
$ k+ y, N) ?8 rerror while observer running SET-CURRENT-PLOT; s+ }0 ?/ I T8 j8 P6 @! K) Y
called by procedure DO-PLOTS
. G- w" Z/ Q+ c* r8 @+ D called by procedure SETUP, j& v4 F- N% K+ C" W& t3 p5 `, R
called by 按钮 'setup'
" Y& L8 q) M2 C" i4 n' s- O求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
