我编的程序如下turtles-own [energy]
X+ I) Q7 D: l/ oto setup
5 [; V3 V- V% ^3 p0 Y- F clear-all4 |2 F0 |8 c/ N$ }
setup-patches
" k9 J k( q3 U8 n( Y/ t% U create-turtles 100( _9 J- G: B4 Z4 \/ y- K' d
do-plots J; _" m' }% f _! ^& R, j% H. u, V
ask turtles [ setxy random-xcor random-ycor ]
" X$ `7 I6 ]6 ~' x5 s0 nend- O( Q; @2 ]6 E6 Z M8 k- y7 t
to go& a2 [4 g2 S9 o5 N# W1 i
move-turtles
. W8 \0 l. W( e" D, g eat-grass7 n2 M* N) F/ r
reproduce
: c0 ?) ?2 f/ T+ Q check-death
5 |4 ~0 E. r$ V3 l regrow-grass( O$ b4 L2 ^( z) O6 ^1 a3 R, A
do-plots7 k, \5 S" H/ i3 C/ c
end+ u# E) \- I1 ^& a0 r+ |8 n* y! U
to move-turtles
- b( e6 h" A; g% t, O( k5 L ask turtles [% Q0 R0 [1 b) ?; ~, K: v8 X4 d" h
right random 360
9 Y$ W8 ]2 y3 A6 `- I- A; P/ } forward 1* [( v4 y A# A7 x' d4 V
set energy energy - 10 K4 m, Y* p- M( s% M* r
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end4 d4 _0 }: `+ }
to setup-patches
4 z) L; g' ~; n( C$ [ ask patches [ set pcolor green ]; I0 V/ I; e7 g5 j: J. I! r8 Z3 z; y
end0 E6 Q7 i3 [2 g2 r) t
to setup-turtles. x9 T" b7 D6 Y/ k' f5 L
create-turtles 100( f% f, E0 M+ h7 H$ Y% p8 R9 ]
ask turtles [ setxy random-xcor random-ycor ]
& a) G5 o: [. h% }; Z+ L6 Kend
. }* I+ v/ N& N( j- ~to eat-grass$ U* [: }- R- n8 ?( x
ask turtles [* P! u- r( x, p p0 G" Y! y& E8 w! ~
if pcolor = green [
$ y) t+ w/ j1 x+ R1 i: r2 A$ A set pcolor black
% q+ b9 L: }4 w# h* m9 N* l+ z set energy (energy + 10)( ?- P5 J8 R9 I7 C. \& x+ N* V
]
3 u# q* M" S8 C ifelse show-energy?. x& _2 } ?1 j" _9 }
[ set label energy ]
, y. ]( t& |1 w% {8 Z) U [ set label "" ]
o7 f- u6 r: v- H ]
; E- e' u/ m I1 aend! g3 M5 W+ e7 N: H( T8 \
to reproduce
5 o+ v; V! n3 n% f4 @+ ?1 U4 @ ask turtles [
* b' y5 ?4 D2 o" C5 `) O3 }6 H& a if energy > 50 [
4 q& W: K& U$ i$ X/ A1 ? set energy energy - 50
' q- n _, f3 X) e( a3 t1 D hatch 1 [ set energy 50 ]
8 x4 o' s& m; P+ n4 y& [; W2 q ]0 E2 R: F9 q. [9 C! ~* s- a
]
- N6 R; Q k x- nend
3 _: g3 c6 x3 _9 M2 g" `) ]* mto check-death* [+ o- i2 _ T2 ]
ask turtles [2 N$ T4 r$ y3 `1 {3 G& G G U
if energy <= 0 [ die ]
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end; M/ L3 y5 c; d, N. |
to regrow-grass2 A: a: I% x9 V
ask patches [
. C3 r H' n* U' I, t! C. A9 Q8 Y% | if random 100 < 3 [ set pcolor green ]
' D& O r9 j/ p! Q( v% V2 y. z ]/ X8 F3 z. g# T# N9 {
end2 V. ~' Y! U1 j' O+ u
to do-plots6 J7 S9 O0 M/ L4 D7 {
set-current-plot "Totals"
; g6 w! o; c, ~3 n. ^& q- H set-current-plot-pen "turtles"
" ^9 ~& _0 H4 u5 ^. U; ^2 G plot count turtles4 Z: A. G1 J' a. M+ q( G' H% c
set-current-plot-pen "grass"* M" d- D8 E" a7 @: G) X
plot count patches with [pcolor = green]
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可是运行时提示no such plot: "Totals"
! @5 |' r- }( j' s8 Q/ Jerror while observer running SET-CURRENT-PLOT
$ S r" c! O% I X called by procedure DO-PLOTS
) [" E n; | @- e5 h called by procedure SETUP' @) s& s' t$ z7 a' D: u Z6 h
called by 按钮 'setup'% C0 a( C# |* s0 R! d
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
