我编的程序如下turtles-own [energy]
* R! B0 y. v k/ ~- {to setup
) U: G& T2 N9 A9 s1 w! l. ^$ a clear-all
" A) ]! D: F0 L* p setup-patches6 h/ r8 r% `7 s$ P& g$ i
create-turtles 1004 P' X" T! ~- d8 j
do-plots$ I. N( m7 Q! ^$ e2 O
ask turtles [ setxy random-xcor random-ycor ]* _) ~: w/ {6 r
end8 H8 i% m! U$ l6 o
to go" h8 n8 ]) {+ `
move-turtles
3 M V: U! S1 D4 e eat-grass0 ~- o# J; ~- |+ L4 {) S
reproduce
7 m3 D7 P3 m' [. `7 o check-death- s4 ]9 x& j) A) Q* }' W$ N: P& E
regrow-grass
) ^6 A8 \0 [4 z& ] do-plots
1 y3 r/ y7 }; K9 [ h: ^& pend+ M4 o: x; L& q7 J& C) q+ W/ e2 Q5 Z
to move-turtles; f7 g3 g$ D* n* ^* o
ask turtles [
' |( u# V" n* \ right random 3607 C* b. R/ K' t8 ?' z/ e
forward 18 _ b, ]5 ~7 ^9 O
set energy energy - 1
+ w- Q7 n) G7 Z3 U. U ]
( x. G* e- h2 H' q$ qend
0 ~, U5 ~! p( p0 w. v4 f+ _to setup-patches7 c, y2 f2 z' F/ [" q! G
ask patches [ set pcolor green ]' s. r' J+ u, K6 N$ h. O0 o% ]
end
% G a6 h. V: d3 u1 Fto setup-turtles
! z! ?: A/ Y9 Z/ | L! A$ D create-turtles 100
% g# U$ H: p K- _1 `: j ask turtles [ setxy random-xcor random-ycor ]5 l7 ^& r% B0 d& f; U' T
end
8 S, E/ }, _. lto eat-grass; H# E+ i9 {& y3 t% f6 D
ask turtles [2 p4 y2 E, P1 j, D) M6 d0 j
if pcolor = green [% x0 v1 v: Z* y \1 j
set pcolor black! d% @" p! E. s
set energy (energy + 10)
& u4 H6 y/ @9 m$ `# P3 ] ]% P- a- d9 L. P; m# H4 g
ifelse show-energy?( X; H4 r1 G( G' u" v* J2 k
[ set label energy ]" s K: W- G9 n6 I$ R/ n
[ set label "" ]+ o p5 f5 H0 ?1 O8 E& ]+ a8 c
]+ T" x4 ~3 b* k) y
end
3 `7 U6 o) N2 V" z) }8 s- xto reproduce
! K% O' y J0 O; ?# _0 o2 p ask turtles [
+ ]- \$ F# o2 n" D if energy > 50 [
5 q. c, E$ b2 ` set energy energy - 50' D- U- T) O6 t2 \$ g
hatch 1 [ set energy 50 ]+ r a( S; x- P) |4 k+ z1 v% Y/ c
]
7 k& o+ x- ]' F3 S& L' F& ~" c+ O ]
+ N$ X# \* w: Q% G* U! Z5 \end3 J Z. h1 \$ y
to check-death/ g. u" W6 I. t6 n/ T
ask turtles [1 J$ @1 K# l, X, a
if energy <= 0 [ die ]
2 R/ k! }- C2 z- W5 K. ?. |8 b ]
0 o/ T, M1 U; E! Uend0 u/ V" j& J: [- H' l+ ~* b
to regrow-grass
; o- B9 J C8 ~. N' f ask patches [2 m# }+ C- M* N) F& K+ C# O
if random 100 < 3 [ set pcolor green ]
+ X! b! K1 r1 c% a ]
+ n+ u) v3 y9 B0 W+ ]3 ?/ X, ^end
$ Q% U$ A; @% u7 S, p2 p0 f8 F, ~: Vto do-plots! z( h, E! n2 z2 b, z
set-current-plot "Totals"
- R; h/ }4 |- t# H1 W! O set-current-plot-pen "turtles"
5 @4 K8 l+ c, q3 S0 y, p! X plot count turtles
. `0 ~% j; g! x5 r set-current-plot-pen "grass"1 h- J a( r s8 q% t; Y+ \
plot count patches with [pcolor = green]
; E% X' B; @" _( s- send
' e9 k* i% E4 i$ i: {! W2 L可是运行时提示no such plot: "Totals"1 d& b4 ^0 i2 W) D. Z
error while observer running SET-CURRENT-PLOT
[! a4 H* @/ u8 Q$ ] called by procedure DO-PLOTS
$ v |% s! c6 x8 p0 X* w$ V called by procedure SETUP( }7 D$ w3 p; q3 C
called by 按钮 'setup'
1 X' \, t W; Q: J求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
