我编的程序如下turtles-own [energy]
- Y% `' N9 c2 W+ F4 yto setup
6 j) j) J: r7 c5 \; C clear-all7 G% N, e3 L! H5 V4 Y# h9 P; g2 ^& E
setup-patches
2 Y2 e- N- e9 W5 W- s4 E9 F# M create-turtles 100! B1 a4 @( I: e: r
do-plots
4 ~9 T6 d1 _$ s/ @- G6 l ask turtles [ setxy random-xcor random-ycor ]
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to go
5 M2 k) t* }7 Q$ I move-turtles
% _% S, ~5 ]; Y" Q eat-grass
+ W' I0 F4 s- o) V reproduce
$ }; F6 L9 o' S check-death f* `3 G& U- c& { f6 x
regrow-grass; k9 T' q! w& Q* s2 D
do-plots
0 ^8 E3 z3 W. Y: O% j! Vend6 }# R5 S8 Z0 P4 p
to move-turtles9 r4 O1 B2 ^8 T& M. [# M- X
ask turtles [
- w ~: o( V; }1 `& y6 ^ right random 360
8 g* J( x4 k8 S forward 1" j- q/ k/ {4 L: I5 a) v
set energy energy - 1
L" R% u4 Q+ Z' y ]0 I7 F8 I" n! w" L t/ ?
end6 ]# }4 D ^4 Z5 _7 D& l
to setup-patches
6 F: s$ }- q% R q' m9 M ask patches [ set pcolor green ] g2 H* O9 {; C* ] v4 D! x- n' f
end( Y/ x1 s/ x p6 \1 E
to setup-turtles/ C1 X, m; F% P6 [
create-turtles 100
/ R/ Q- f6 B6 e: @) S ask turtles [ setxy random-xcor random-ycor ]
: O3 e) l. W' R( hend; ], d# c/ E9 u2 P
to eat-grass9 f1 A' m# i" m3 b! h4 X# M. q1 J
ask turtles [
: p2 @1 p9 ~* }3 _. T8 c. i if pcolor = green [3 Q8 R& \6 g/ o, o2 ^+ s
set pcolor black
. t, h! a# F* g9 {" j' q set energy (energy + 10)
H3 i( }# ~% }! g" B! ?6 W" i: h ]
6 J/ }0 [! C4 p, W ifelse show-energy?; s8 V1 m& a/ a
[ set label energy ]
$ Q k$ s% C% I. }# v- E6 x [ set label "" ]
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end
% A; C8 g) {; B W/ W; Qto reproduce6 U+ a3 @. \+ N; |0 T v
ask turtles [+ A+ T4 z* T! {: }
if energy > 50 [
6 F( }$ {7 W! q& y# S+ }- v set energy energy - 50
2 p9 d5 t6 j) x' ] hatch 1 [ set energy 50 ]4 b8 i% {5 f, ?& ~* A, a; E- T
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end
2 K/ }% o9 |1 k6 R+ K8 I ~1 K7 Xto check-death
! _) V3 p" T7 Y* o. @/ w9 y ask turtles [' D( I" g; u* W5 J
if energy <= 0 [ die ]. J: T* k+ F3 q: b5 y6 V1 D; G
]
7 p, o+ p/ Q9 G' f8 C4 oend
) p* O, [5 L9 Z( t% Hto regrow-grass b9 g" J( b4 e8 ~
ask patches [
3 b$ _& k v& o8 p; ]$ I. e( s" E if random 100 < 3 [ set pcolor green ]' g# I; h' L9 _, }. y7 q+ N; K# b
]
9 ?* I0 w6 W% z2 E: B) B+ Nend% v/ H- ~4 ~* d$ q2 _
to do-plots
" r: ~# _+ G0 F6 W- m set-current-plot "Totals"
) d+ y3 \% P& P$ K( P9 r- _$ ` set-current-plot-pen "turtles"
5 ^5 ]8 m9 H4 O+ f% M0 K; S plot count turtles
3 b- g; q' d( H( `3 H set-current-plot-pen "grass": q& x7 }5 n3 A" M& I
plot count patches with [pcolor = green]1 X$ p5 L9 d+ y7 G) Y
end" e0 i* h0 W6 D& H9 o, K2 L, y
可是运行时提示no such plot: "Totals"
7 D& f( r) f+ d i7 Xerror while observer running SET-CURRENT-PLOT
5 h" a4 S" b1 {: D& f8 h. D called by procedure DO-PLOTS
# \; O# K) N6 Y called by procedure SETUP
/ V3 [- K+ H X' @! K) N called by 按钮 'setup'
* ]* h2 d+ K" e3 X$ Z4 b, O9 L求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
