我编的程序如下turtles-own [energy]
8 W$ b; b$ D; A# c$ V4 V, dto setup
2 L/ `: o _( c% O; \0 U clear-all
* y% c' z- I9 v% \; N i: ~ setup-patches% J: N8 K7 e: m" R4 K( B
create-turtles 100) t+ a5 W1 |: V4 P+ d2 B% t8 G5 i6 }
do-plots
; q( [( s0 X! r2 M* j+ N) K" A+ m ask turtles [ setxy random-xcor random-ycor ]
$ N: D: J' a/ [+ [end
# t. k6 q) ~- Q8 g3 Kto go
0 v `; Q8 S" G move-turtles
) W) i! h8 Y- x& I: M eat-grass
8 P0 U* {( { @; o- k/ J& K reproduce
$ T& t( l9 Z0 V check-death
. L, ?9 P$ j* ?4 C5 l regrow-grass9 S! l5 _! v+ l2 v
do-plots2 l6 M C# ]. f4 r6 D
end, `5 M7 @) h9 r2 @. O
to move-turtles
) _" `9 h- P% R4 _! s ask turtles [9 L7 K% }. ^* O% W) [; s" V
right random 3605 I8 T p8 V. p$ w) X* R m
forward 10 K1 u0 W9 d. d A/ {
set energy energy - 1
) h* s1 d" e: W7 }' u ]9 q/ j: U) P3 v$ }7 n0 L- C
end
, P2 `1 w* E/ o; x5 \to setup-patches" K( ]: q" T4 z) B1 u6 T6 r" }
ask patches [ set pcolor green ]- w, k% n* }$ c) y
end
: `9 W) F0 X' p6 j( a0 a" Oto setup-turtles
( d$ E, L* Y# Z, E/ ? create-turtles 100
0 Y6 K+ g" M* y8 U) b ask turtles [ setxy random-xcor random-ycor ]9 U, B0 E/ B2 J) V1 f/ k
end
/ U/ c5 `+ d1 o e+ Eto eat-grass
6 E3 K$ I u- V6 p! s5 ?# a0 U5 Y ask turtles [
! g, j/ k+ \2 {. b s7 n if pcolor = green [
" o, \1 J$ S. q& M0 k, ^; I2 i G set pcolor black
' R. }: ~5 ` ~4 u1 R set energy (energy + 10)8 r% _' F# Z2 ]8 V0 e
]
5 \' s, \5 u7 s1 h/ [7 Y ifelse show-energy?
( f; D C( }* h, y" t) G+ Q& u [ set label energy ] P, R6 a0 Y. W% F, Z! r3 t$ _' r0 H# u2 f
[ set label "" ]' r' W# p# W5 O) ^6 ^" e! S
]
6 f5 Y: m% F- f. M! z8 z4 z% |end
" t( W( ]' `. Cto reproduce
6 V8 ]7 @( d8 G9 W& x2 { ask turtles [9 M6 w8 ~. Y* o; a1 B% A9 e" T
if energy > 50 [
6 {7 `% v/ Q# R. V3 H4 ?& J set energy energy - 502 e& Q; _/ u8 D) c, E
hatch 1 [ set energy 50 ]# ]4 N1 H, U' j+ k" m
]
; p1 H7 a2 I0 ]% w ]. O" h+ H, z: @, Y" K2 A& T
end
3 d* n C7 i$ E& F) Z' `to check-death" Y; K/ t! b7 z/ e' r2 q
ask turtles [- {5 p- I0 B$ P# A4 {
if energy <= 0 [ die ]' \& J; I( R6 Q' |6 f* S/ g4 v @2 X
]! _6 l3 N9 a, b3 T% Q
end7 b r/ D5 a% i8 a ]
to regrow-grass7 e# S C6 p8 f( S+ W$ G9 |+ W
ask patches [
1 a( Q- k4 b5 E if random 100 < 3 [ set pcolor green ]
2 l9 L* c6 C1 ^! r ]. H' x6 P `, m
end
% u o8 I$ r$ ]! [% t" Kto do-plots
4 S- L! S; E; Q' B( _( Z set-current-plot "Totals". m! P: T' Z4 T3 ]7 j. Q; j
set-current-plot-pen "turtles"+ a4 B4 h* i2 \& H9 O
plot count turtles
* M0 C' `" N) } set-current-plot-pen "grass"/ \# T5 E- K) p" Z; P. ^
plot count patches with [pcolor = green]2 k3 m2 m6 ^# q, G, j
end/ T# G ^4 d6 t0 g% R9 g' [
可是运行时提示no such plot: "Totals"* ], S* o3 j ]
error while observer running SET-CURRENT-PLOT9 {. J& `, k' ?( d& E) l
called by procedure DO-PLOTS
! H% p0 h9 p$ c3 H; | called by procedure SETUP1 k. t' i3 M8 A5 V( G
called by 按钮 'setup'
9 z% O9 u: @1 u5 \1 R9 h; L求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
