我编的程序如下turtles-own [energy]9 A$ v+ `5 e7 a8 O( m
to setup
2 ` q+ q9 y1 I clear-all
9 r4 P; f/ V% v8 A! D setup-patches3 O' q- z6 _5 P- M
create-turtles 100; ~. }2 J/ K+ \" e" h6 M3 c
do-plots
; g2 F# c. j: G: `# Y: q! ~, b ask turtles [ setxy random-xcor random-ycor ]$ `" d3 L8 f7 \5 U4 H2 z* J2 i2 b% N
end/ Z4 s, Q1 G4 m0 `$ ?# Q
to go
0 J! b6 f+ l( E move-turtles
+ s- ~7 u% _6 i eat-grass2 d+ g. i6 V; H' q
reproduce
1 d+ e2 Y9 O* Z check-death
: l& `) P5 a. k( M regrow-grass
! ]( \! |' e' S( n" w do-plots
, b, n$ G/ [) h8 f0 W! j8 |end ?' s) B9 E& H
to move-turtles
7 p- c# R, h! U" \) t2 k) {$ s ask turtles [' d$ ]3 I" q. g9 L/ T
right random 360( t9 H" i; l w9 S( f
forward 13 j2 D9 g; v9 g* H. e& I
set energy energy - 1
) T0 q' r. M! R4 I3 c* [+ j; u! _ ]
{8 ~7 b$ [; T- Y: t: U- {1 u! Qend
/ c* u8 f% ?3 a b" t7 a- I4 Qto setup-patches
9 a4 G% S/ S- i ask patches [ set pcolor green ]5 o- f3 b. k' W4 g) i( h: v! P
end1 z9 t9 m: k/ l1 }8 _
to setup-turtles: N. {$ y: G4 ?& Q w K# g& c8 @) [
create-turtles 100( w. n- ]* ]: g% n& v
ask turtles [ setxy random-xcor random-ycor ]
$ }; i: ?* N; d( w. Q2 a1 a* \% I: Send
9 x# N" A4 x* pto eat-grass& w* g2 i! T/ p* S( ?# E8 u7 [
ask turtles [0 Z8 z6 k0 k: {( B
if pcolor = green [
% T0 f% R! W2 X8 S( d set pcolor black
$ q+ D3 p/ `. ~) }- Z set energy (energy + 10)
/ X" J% {2 b5 B' e. ^5 _* b& B5 j9 S ]* S4 v9 B) I- }1 ~6 a) p9 k
ifelse show-energy?8 Q' i" Z& X: X6 H7 H, F
[ set label energy ]
9 p6 a+ ^* E2 C5 N( n, [7 Q" x9 W [ set label "" ]
: E$ K2 U# ]4 y |7 \ i* P$ d ]% ]* b! Q+ w( c* G8 E5 `
end, a0 {4 O2 u8 _3 Y) u6 n, o
to reproduce
4 K* h, h: d& a" p" k7 ~9 Z' v ask turtles [
6 ^$ a$ w* j2 f$ x! v" W$ I if energy > 50 [9 B% ^* ?/ ^: n/ L+ @
set energy energy - 50; q6 L9 f2 f: X
hatch 1 [ set energy 50 ]% R: l: ?$ A1 d; f$ [
]
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end" c# ^) @$ Z% T( h9 Q; T
to check-death. B; s. g; ?) {; y1 o
ask turtles [1 y1 a8 R: ~, V4 d9 ]6 }) @
if energy <= 0 [ die ]
+ l4 w4 j3 I0 S* k! ^1 e+ W ]
6 @ i3 U* E3 m( i3 T6 s: \4 Mend
3 M2 c1 U2 S: Q4 U3 E9 rto regrow-grass7 e' m& H! X: k# g6 l, l' N1 V V
ask patches [# ^4 F0 Z& V$ ~9 n+ f. _8 V
if random 100 < 3 [ set pcolor green ]* K/ I- \+ S' W9 r4 l5 [: ]
]9 u; N# f% V ~' _7 n/ r, V
end
# G+ {0 u/ B2 i' Oto do-plots
. B$ T! Z( ?0 \) e/ J- s4 c6 l, e set-current-plot "Totals"1 ^) e" Z- I* r
set-current-plot-pen "turtles"
$ q5 m; P& v" i2 c" D% Z3 k plot count turtles" y, Z' ^; D' \0 T* e- n& y, z
set-current-plot-pen "grass"( j& g7 S) [) T+ J4 x% k
plot count patches with [pcolor = green]
0 |, D! i" ~8 k8 Zend
* o, q4 H2 e% G可是运行时提示no such plot: "Totals") ~# Z$ [5 o, p) s
error while observer running SET-CURRENT-PLOT
) A8 @, {8 w: g5 k called by procedure DO-PLOTS, u$ v$ l- }: N; e m R# C
called by procedure SETUP
* D G# E5 x0 e* N8 u3 Z+ ?- l9 y& k called by 按钮 'setup'5 Z) M; P( s* W( u0 b; d: k: a7 M
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
