我编的程序如下turtles-own [energy]
3 j/ ^8 a4 {2 `+ V& w6 M% u; C) wto setup
% s* M' K, }+ l clear-all
* Z& C2 Q1 q$ l) @ J( F; y setup-patches
0 F" h' {/ m! E6 Y/ W. K' e3 t: F4 J create-turtles 100
9 v R6 C$ h [$ W% u2 B0 ]7 H3 l do-plots
* A: w# a3 ~4 O! h; w6 L ask turtles [ setxy random-xcor random-ycor ]$ g& f2 z# T4 m7 X+ Y- ?2 {2 J: Z
end! y3 I. i- g+ r6 a: v, O
to go1 S/ k r! v2 z4 B8 S) {% S
move-turtles" X* }6 D! c( ]" m1 w! U1 |
eat-grass
) \3 z9 H8 | }' h. E: Q3 [. u8 H reproduce. o! Q/ A/ r" Q, t1 M
check-death
' o" }: L$ F+ i( h1 v( E regrow-grass
& @7 K9 p0 f, `! f% k5 Z, \ do-plots" u; |8 }! W- o/ ?- H! h( J
end6 y6 j1 n C( J. n' l( L% _& U a9 ^
to move-turtles
9 j2 t: l. L8 R. _ ask turtles [
2 U# G' b" v; x right random 360
2 n* |4 _; }3 i v U8 H forward 19 i7 a/ n/ F1 H9 R7 `1 H4 k
set energy energy - 1
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end$ ?& ~+ _' j9 e) Y
to setup-patches/ W4 w+ X8 n5 p) I' C
ask patches [ set pcolor green ]% i/ S5 N: m) S. x0 t1 w
end) t _; ]9 \5 R4 J. y
to setup-turtles
3 H' u! U6 p# P, v$ [2 c create-turtles 100* J2 q, d- p- H5 s8 Y% F) n
ask turtles [ setxy random-xcor random-ycor ] m; M( w# w3 @ a, c+ ~& a
end
' Z6 l" u& z$ g7 |to eat-grass
# T3 a; o# b( y$ x2 q4 e% m* F ask turtles [
) Z- e, F) j) R; _ if pcolor = green [
3 h4 C$ X- _, u0 \. S2 k set pcolor black3 ^4 k$ L; b3 X" W( ^6 u) I& ~
set energy (energy + 10)0 b8 |$ H, M$ m4 c! y n
]$ J; M3 c- H2 H; d9 Q0 J! g/ _
ifelse show-energy?
+ D% ?- X0 U9 O3 v [ set label energy ]. L$ ?5 m2 w' a/ D6 Q L
[ set label "" ]
9 w% m+ W% o" P' W& V) Y ]
5 S5 j) G* \8 @( X& r, F- W: {% A& iend
& l3 Q, e- Y& s: ]! ?/ Jto reproduce
9 |# A/ f B/ W' l! \) f* i$ _ ask turtles [0 p6 v. U9 c! I# E
if energy > 50 [
6 M% c2 _; |( _3 E) R set energy energy - 50
* J, t- x1 @7 O. F6 q$ \ hatch 1 [ set energy 50 ]
3 J5 j- `8 ~% k* Q- D/ f ]
: ~0 p/ p) g' b* x9 L ]
" t3 U) l3 d2 X) s2 iend
: h" K% }# Q+ r( c# u" Lto check-death
* ], E/ X0 q( J) d3 a ask turtles [
+ `3 J+ a7 R; G- o. ~' e/ v0 u if energy <= 0 [ die ]
/ A' W) e" f5 `, o$ r7 t% T ]
5 j' X" [" a. Q0 o8 p1 \/ O+ Dend1 H) c+ `8 ?% g+ I0 k X t* ]1 f2 N
to regrow-grass
, d8 D" ?7 m( y9 W4 k) m ask patches [
2 x8 p9 _* q+ _- J# ]5 H. Q if random 100 < 3 [ set pcolor green ]
5 C" j0 y5 p6 W9 H9 p+ j6 B G ]9 x3 t8 E, T! ^8 a! a) i' |8 j/ _
end
. u9 \0 Z# [1 x- d- ~! [; hto do-plots9 j+ U* ^( i8 n u% l: k3 ~+ U
set-current-plot "Totals"
! s8 e3 G) Z2 w# ^ set-current-plot-pen "turtles"0 l/ e2 m; n7 \/ v
plot count turtles4 R' j- \& ?' A; Z/ U# H
set-current-plot-pen "grass"
6 j0 [* m$ p+ O plot count patches with [pcolor = green]
0 }5 h/ P6 k4 E* `# p# iend
: p6 y8 B+ A8 Z) w可是运行时提示no such plot: "Totals"
0 [+ o, W3 g1 B3 c, G5 D3 b# uerror while observer running SET-CURRENT-PLOT# U. E, [4 ^/ c1 Z4 U
called by procedure DO-PLOTS: Y6 [, j+ c. h8 Y8 s9 f* C$ d3 v
called by procedure SETUP! _ N. l4 T% {, \
called by 按钮 'setup'' I! ]- g4 z8 {* T( m
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
