我编的程序如下turtles-own [energy]
# J5 _+ U' W7 jto setup
. v8 o! u2 _" G. L5 W clear-all' [% S) B( v; j- t6 i. X2 z$ o
setup-patches% M( t; y3 V" M1 }7 U3 k6 M6 f0 o
create-turtles 100; C+ w1 ]0 l) m" p- m( B- R7 \
do-plots
7 p, f! ~! ?; ]+ v& u0 O3 a4 o' k ask turtles [ setxy random-xcor random-ycor ]6 E& d& T: X) t! h
end$ C) G: p' D2 G9 ]$ Y
to go
! B3 h/ C& F( M, u9 } move-turtles- G1 B I6 V, u# @9 |
eat-grass1 m9 S1 Q* T1 P
reproduce
$ L( B0 a) ?) u: F$ i3 o& W& e; h check-death
" b3 f3 d* ^+ H/ M m0 [7 Y" X! g regrow-grass2 ^3 ^; |- N4 `+ B C9 ^1 Y
do-plots
' H' {: Y9 \* j8 Nend
# c) @3 j! p, R% f* _+ F2 c9 Hto move-turtles0 N" k' z" r! p
ask turtles [
5 D3 Y8 b4 N3 X right random 360
+ ]0 U) a; y# F: b forward 1
' M& g9 g: W/ @9 `# } set energy energy - 1
4 s6 e/ R+ b N+ A; A' R0 Q ]/ J- p8 g! s$ P5 N6 j
end
- V2 J" s# R% f7 |( o; `to setup-patches
, ^) i$ }; E7 u8 \1 t5 d N0 o ask patches [ set pcolor green ]' h! }& [3 k( I8 N& \6 F
end; G2 [/ Y, w' j. u/ m
to setup-turtles
& ]" P6 \5 U$ b create-turtles 100
. v2 M; D! s; C5 L) o+ z5 q: r ask turtles [ setxy random-xcor random-ycor ]2 ]& o/ r0 C6 P0 Y; T \
end
( L# l3 O. W& z$ C7 Zto eat-grass0 c0 B% }6 D1 Q' Y0 T
ask turtles [! f# ^" i" R- i- \
if pcolor = green [
P! K" I" p8 g- E: Q' e set pcolor black
8 G3 _0 {5 N0 O7 m5 ^4 F set energy (energy + 10)0 E8 d' X& \4 j& O# n
]
6 s, ^" Z; ?; H! @8 h ifelse show-energy?
: T" \7 N1 ?2 e5 E9 L" I6 Q, z [ set label energy ]) ~; C9 l0 p4 o# `; N. M
[ set label "" ]$ j& ?. l$ h R W% J, D
], b0 F8 F, a# W& W; X4 T' v
end. u% k8 U! }! H, n
to reproduce
0 ]7 ~0 T1 }) G8 s ask turtles [
7 G7 A( ?6 T! D' y7 a/ G if energy > 50 [
$ W& Y% ?$ P8 F5 [8 u; e set energy energy - 501 y" u, G8 o: Q1 [ u% B
hatch 1 [ set energy 50 ]5 G* ~# a% E* J+ p4 j
]
5 k9 X) t1 E) W8 x6 I( K& S5 D ]
+ Y8 M; N: v; _! J% cend0 ]+ _5 K* q; W( p
to check-death6 u$ M7 k6 B2 d
ask turtles [3 k) ]/ h$ j) ~+ ~* w
if energy <= 0 [ die ]
1 R( D5 n$ y( x, Y: |+ e- S4 N ]
: x; t% p o: s- I7 O1 d/ Vend
# h) @+ a6 R q6 Dto regrow-grass
5 X+ E6 {6 y3 ^ ask patches [
# [& D) u& P" q7 A' L) O if random 100 < 3 [ set pcolor green ]9 B' j2 n1 g5 ]9 v' `) b
] C, d, l$ a* a0 Y" J9 [" z9 D
end3 M7 l/ ~ \+ F8 \& o5 U- o
to do-plots/ q7 \) m2 W- }0 a9 l2 J" P
set-current-plot "Totals") y& Y+ k# O( o
set-current-plot-pen "turtles"! z7 a: C7 |; I# Y' g5 d
plot count turtles
9 l, I$ X! Y4 J set-current-plot-pen "grass"
, x, }- l+ m( R5 z- p plot count patches with [pcolor = green]
: _/ a5 t) Z: X$ v( q0 Kend4 S7 N9 m9 l {! s( h
可是运行时提示no such plot: "Totals"
) G1 Q3 Z( b/ J; S- U& Lerror while observer running SET-CURRENT-PLOT
. K6 I0 X8 N! g' Z5 s9 d. H called by procedure DO-PLOTS
& P. S3 O% \: H: g* T1 c$ J( m called by procedure SETUP
4 q5 f4 p& {" r7 K& m called by 按钮 'setup' v- w: _) \3 w/ p. p3 Z1 }
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
