我编的程序如下turtles-own [energy]3 H* [4 Y% u4 L2 b8 }
to setup
$ h8 l9 G! l. d' x5 P1 D2 E clear-all
1 ?' Q! ~0 j3 e2 X7 R c2 g1 K setup-patches' X, W# T5 r# A# [
create-turtles 100* o& r$ a' d* w+ u/ o
do-plots# J4 l4 E2 ^! i+ a8 o- m
ask turtles [ setxy random-xcor random-ycor ] K$ e. `' M8 r a" U
end
) R _' ]& \) h+ D/ Cto go
' U7 k" ^& k2 T9 X: w3 S( b% S move-turtles5 [( o3 x" g, |7 R! d. ^0 K
eat-grass \2 o6 w1 ?' G, J( ` a
reproduce5 u$ O8 x3 `4 W* j9 t
check-death
: K u( b0 s+ d regrow-grass$ s/ e- x: P1 Q- W$ O0 F
do-plots% p/ }1 H: Q I( W
end
+ F2 y+ R- N0 C0 I6 j9 U$ Xto move-turtles/ [0 w4 G2 O$ M6 Z8 ^6 a
ask turtles [ u0 W% O) w# c) N8 D1 \
right random 360
0 h: T+ q+ |. v0 ] forward 1( d% G$ j5 N: \" A- Q( Y$ w2 {0 L
set energy energy - 1
. [9 D2 m4 `/ A% y# U4 V. C: G0 Y ]
! |3 k- S1 S3 C5 I( S" ]" {end( S" q4 G0 t3 S" H0 H
to setup-patches
, {) G' N6 B2 \) q! C ask patches [ set pcolor green ]- C+ z+ d- C( T4 C5 S
end% f1 _3 H. @1 o+ g% c
to setup-turtles" X: Z( D* e3 C( c, ^. l; e
create-turtles 100
9 o% q3 P' t* @ s1 i4 _; L ask turtles [ setxy random-xcor random-ycor ]. i$ R+ P- f1 Q7 [0 E) X
end: _. a0 ^; B3 G) l( L, }. K
to eat-grass8 e3 Z/ y) J) H
ask turtles [
: p7 b- i+ z/ J5 k( Q if pcolor = green [% T. [/ q/ J- c) s7 j
set pcolor black: H I7 T4 h( c
set energy (energy + 10)
! Z- o/ i# ^4 p: m, s ]
4 d, ]5 m% \2 h2 h0 c+ d ifelse show-energy?% ?4 j# e/ A2 F; g* @
[ set label energy ]) q+ `' g, z K) R; a2 \
[ set label "" ]$ ~/ D6 L" J8 B3 H
]
1 t2 J+ J* Q6 ?6 `8 I2 `5 o9 E/ Aend
2 l$ \, m2 `; ^8 i, sto reproduce
, a D/ j# Z8 J. z ask turtles [
+ T( C* c3 [- X. l. _ if energy > 50 [
1 J$ n$ e8 r2 h( o set energy energy - 50( @0 r; S* M! ]
hatch 1 [ set energy 50 ]( Y/ l2 t" g7 D$ ?$ E
]
: C% g9 i+ B0 [% i, n ]! W; J- U* m% N& p* ?( o
end" q7 I! E/ C9 u
to check-death/ G, k2 I- d( S( D- T" q
ask turtles [: K- P: o: R6 w! l! s+ r# G! R1 P
if energy <= 0 [ die ]
) z; H2 g1 L! Z! Z6 S1 C- x) | ]) S: b6 |' q3 t; N( M. [
end4 @1 p- y7 |# ]. {6 ~1 \. J
to regrow-grass
9 ~& S: p# k) t ask patches [
2 n! p3 f6 e& [& H# x if random 100 < 3 [ set pcolor green ]. K" e. T$ \( A% L
]6 B6 I( t! t6 E2 O$ j
end( J3 \& e9 s$ @' Z" C
to do-plots! z* x+ t; t( T% ]5 X; N1 G. ~
set-current-plot "Totals"
- X/ z o" Z; a ]# {/ R set-current-plot-pen "turtles"
' y1 i1 p: i( Y3 [/ k* U5 j3 N plot count turtles
0 u7 I9 W: i! P5 [$ [: u5 e( N5 a set-current-plot-pen "grass"
! V' O. y3 e l5 d0 H% b4 F# D4 a plot count patches with [pcolor = green]
- y0 U& _9 A1 m; F. O: M6 H2 h# tend
+ y) P+ a9 U; t% z- G% h可是运行时提示no such plot: "Totals"
: m; p* ?+ c- Kerror while observer running SET-CURRENT-PLOT8 y- [# C) y l2 s/ H
called by procedure DO-PLOTS2 x2 [ g2 ^! t( e: E
called by procedure SETUP
1 ^7 n* A7 N1 i. `( | called by 按钮 'setup'
) v% Z+ A" R/ ~7 r. l求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
