我编的程序如下turtles-own [energy]0 l1 v; r/ ?. C) I
to setup' H: q; l1 ?5 p8 @( w4 K* W
clear-all. u$ X6 b9 x. D }2 M. d
setup-patches
$ }' v! ~7 \* ]4 q' ?" p create-turtles 100+ x8 M4 Y% S, {6 x4 ^. A |0 S' m
do-plots- S2 `0 N M$ B1 \/ `
ask turtles [ setxy random-xcor random-ycor ]
$ b4 }9 l4 X, U8 o* v3 M+ gend4 z. g! F2 t: p# \! \4 _- q
to go
s8 Y' A: v- w4 f& N move-turtles
& ?& P" x: a; j: G e eat-grass
% L" T* C! t# r% p Q reproduce
H3 `, ?; q, k# ?+ @ check-death" c* N# t, |, [6 X- X4 o
regrow-grass
! L8 W- f) O8 ^3 z4 r do-plots" d, L1 H c* i0 O' N& f" _) e+ @
end. n& f4 a" v! n$ ^; W2 q% i
to move-turtles- x2 p5 L! g; l- j+ P: @. I
ask turtles [/ P6 Z9 @% R) y1 R& E- L
right random 360% U2 r& I/ k# d/ X& W0 y
forward 1* @" Z3 x& Q% Y9 ~. k7 ?
set energy energy - 1& N$ b& H4 k$ y; r* o$ ?
]
, v! F1 P: s6 }7 z. z6 L! F+ Dend4 a* N) Y! o* {$ w9 H2 Q( l$ z. J
to setup-patches
, c% u7 f% ~& M G+ {8 p" v: ]4 i% I ask patches [ set pcolor green ]
. E, ~2 U2 O6 \end
# U8 B$ C6 X2 F5 O2 ?! ato setup-turtles5 e$ N( U6 j- I( `* a
create-turtles 100
) C7 x! z3 {" x; G! H# ] ask turtles [ setxy random-xcor random-ycor ]! w; @9 t9 |6 ^( E; U3 P
end" ^, B& F8 M7 s) z
to eat-grass# q- L7 [" H) [" A4 D
ask turtles [
. ~' s$ q. s; K$ `1 B if pcolor = green [
" b$ q- h/ j3 N$ X! R set pcolor black
: l/ c4 h8 \0 O, E set energy (energy + 10)
7 z% g/ a( j1 _5 r& m6 Y ]+ {# i/ p) P) `# w1 t
ifelse show-energy?' n1 G% d- w0 e7 Z
[ set label energy ]
( S L: b2 {% Z1 V4 S4 a1 `3 s [ set label "" ]
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end
- D1 H$ J c4 |to reproduce
7 B+ u" f% o* \' [5 J: E! ]) r ask turtles [
/ t1 e7 d6 _/ @6 q( W1 o2 c* A if energy > 50 [. b$ @: ?! A6 b9 z4 [( L
set energy energy - 50* V) i7 n# G. M' D+ A2 Q
hatch 1 [ set energy 50 ]
! X, x3 D" ~1 u ]2 C2 r8 r! B" c1 y$ ?( h' @
] E; x: w& w" u
end* U$ B3 y0 V, V3 |% Q- F7 ]
to check-death" g/ o; Y9 O4 ?) U) k: ~
ask turtles [. q5 T) g. b0 D- o
if energy <= 0 [ die ]1 N* H1 U3 F s: Q/ m. u
]
. N+ L. U* T; ]! R3 W9 xend/ F' p4 K1 U1 F" [) w' I: R6 U
to regrow-grass
3 m; G1 f" }0 E- d ask patches [* X e, ~* g8 g% ]: H
if random 100 < 3 [ set pcolor green ]' p4 K! y3 N2 |# x7 A4 X
]; u0 Y6 Z2 L4 I" A: h
end; y' f k+ Z7 {" m9 Q
to do-plots5 |8 N) N8 @5 r) R
set-current-plot "Totals"
+ h! J& E* P8 `9 ~ set-current-plot-pen "turtles"
) H* l- _- R6 O" N0 } plot count turtles
8 Z, {& Z/ Y/ L3 x) o' A. X6 ^1 {4 ~ set-current-plot-pen "grass"! V5 @# w) ?$ [9 w' i
plot count patches with [pcolor = green]
; c. c& d/ a4 k% ^7 Q* Zend
+ c% l+ t& Y8 v, ?可是运行时提示no such plot: "Totals"% ], r p/ D0 d" {. g# Z; k# w
error while observer running SET-CURRENT-PLOT: h% |# S2 W' V. o
called by procedure DO-PLOTS( j( M6 X5 f$ t5 k9 t
called by procedure SETUP- J8 D3 ~0 Q; f) `/ ]
called by 按钮 'setup'9 O( O& X2 m% c) l
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
