我编的程序如下turtles-own [energy]9 Q! u( j! o( i) F6 K
to setup0 W5 r. E* H; D) [
clear-all/ [' L! O) H. R% f
setup-patches
. e' E* h) m$ Z( k4 h* v create-turtles 100" X# u2 P+ V# x& m N8 K
do-plots: \9 F; R* c' S: v# r
ask turtles [ setxy random-xcor random-ycor ]
( [+ z* J4 x" K/ T1 lend9 S6 L* j" V5 Y2 f4 s
to go, O) @! r T. T
move-turtles
& d. c: S' ~& H: |! X) l" c eat-grass
) O: R h" p8 d! B" k. ` reproduce$ h9 m, [' Y, r
check-death. [% ^$ i& E: O, ]! P7 m! W' T; |
regrow-grass {; r& ~0 a: T% T1 I! b6 d+ P: @! f' n
do-plots' X4 f$ @- y0 h1 I- `
end
2 _% i) x+ X! T5 W4 S% Xto move-turtles( O P! w0 k( ^; f! ^2 w1 v
ask turtles [
4 v$ m3 t9 t& w# l right random 360
- r! t j# g+ Z9 b5 B forward 1
. W8 g) [) r+ E, b- w set energy energy - 11 Q7 V4 m) i- ` g3 `9 r9 T5 E
]1 e. U4 y1 k, z- j2 E7 j
end
* B6 V' D; z" l: g) }' A1 x8 ?to setup-patches0 F0 K- c. @/ b4 i6 r g& I) v# k( Y
ask patches [ set pcolor green ]% L1 H5 W5 i3 D, ^
end1 X9 I& B0 @ E3 B4 p
to setup-turtles, O' _! D0 z0 k, ^7 l
create-turtles 100
. O8 V' T; t& Q; F: I1 U6 F ask turtles [ setxy random-xcor random-ycor ]
; }/ ?$ O/ v5 z1 aend
7 M! L( Y! N0 m( L+ Qto eat-grass m6 V3 i' L) s+ Q, Q2 ^8 |: |2 C
ask turtles [! V c3 S* l3 c5 K i" A1 W
if pcolor = green [7 a9 @6 E# f: { ~+ ^9 i
set pcolor black
0 Q& A- p" @9 m3 x set energy (energy + 10)
0 c5 h! a. e% p2 i/ \5 t; O ]$ Y" k, B0 s3 }) i
ifelse show-energy?$ t# A) T& X: e: T
[ set label energy ]) J H8 l) a9 o2 K' l& ^9 j. E
[ set label "" ]
# O8 D9 ]: l2 ?' y4 k" } ]; ?6 A, y. c- |. S
end
8 X. g( `: ?: ito reproduce
/ U- ^- j2 j; {0 i* C# o ask turtles [
5 R" r0 l( \# Y& Z if energy > 50 [1 _* |( z: B) }- e8 Z- G
set energy energy - 50
" g* s& H$ f- }6 L% I' K% x' E hatch 1 [ set energy 50 ]
9 C! D0 u3 ]8 ~1 I u+ r ]' B9 c: U5 T2 r+ {; n
]
1 {9 D& d- _8 y, x7 jend4 B) i' K8 @6 p* S% o
to check-death
/ [8 ]' e' ~2 t ask turtles [+ J9 j& p" k& q0 Y6 S! C) j
if energy <= 0 [ die ]
1 M) i1 O5 [' O) r W! l. y. H ]
/ m; U( [1 v6 T2 X' @end
( O/ Z: c f! g1 r. }8 r9 }7 wto regrow-grass
' ]# | g% q* g# G+ }: {& ? ask patches [* ~ K. L- ~, v
if random 100 < 3 [ set pcolor green ]' {! H4 z* P! @+ Z, E5 Y: L
]
% C7 L u8 i: |5 n. z* H7 rend
8 \7 i# Z- J# j/ u8 t2 c) V' dto do-plots
2 x4 R P2 i$ A set-current-plot "Totals"
$ m/ |- D0 o5 `3 i& M set-current-plot-pen "turtles"
3 z, M: F( b/ `' p5 H plot count turtles
p. n- g$ y8 b* F6 D! ] set-current-plot-pen "grass"
( R/ r% X" r% |! z* }5 _- ?% ] plot count patches with [pcolor = green]/ Z; h5 \4 ]+ ~; B/ o
end
' f3 n, p/ ^+ {& Y3 z5 g$ f可是运行时提示no such plot: "Totals"
9 N" @, H, \8 w1 t9 Y Cerror while observer running SET-CURRENT-PLOT
, b* p) L! O5 C6 O called by procedure DO-PLOTS
: k1 C3 ~& I- k8 Q: R; Q called by procedure SETUP
) L" Y4 B/ g! X5 n' m) X, y; P `; U called by 按钮 'setup'
- M( _+ i4 f0 t& S7 J8 V求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
