我编的程序如下turtles-own [energy]
) F' z2 N5 Y% u. s J0 sto setup
1 H& m; G1 w: A: n. {3 h9 X clear-all
& \% U$ j8 Q \4 x O. _ setup-patches
; j# V, @1 F+ e( }( A2 ]9 x create-turtles 100/ E, U6 v I2 s0 \1 y3 i
do-plots8 k# M# G" X% O5 W4 ^! Y% M% T& `3 d& y
ask turtles [ setxy random-xcor random-ycor ], [1 o/ C; V. u- `8 A# O) `8 g: ?
end
! V* I6 ]$ q* Pto go
, Q* x/ c) K* B. l0 {( J0 \ move-turtles
# f4 \8 _' v9 I* I eat-grass4 _2 A! Z0 i/ H( @' v+ y ^
reproduce
/ p6 T3 d8 l, L( x( l. x check-death: c, Y( b. ?& d* v
regrow-grass$ _ }* ?4 v) `' A) _
do-plots8 v: q0 l r" x$ d% s" b% w# b
end
( R1 Q9 U0 Q/ b/ N: U. jto move-turtles
8 n5 E0 W( W* Q2 g" m ask turtles [, _+ Z) ]# U1 x4 [1 A0 n
right random 360( a4 M6 m' E; L
forward 1, ?# m- ^% H2 w5 I) h6 r
set energy energy - 13 r/ Y* u: _% y* T
]9 H2 m- {1 p$ N# N8 z: ]7 p
end
( u6 c1 e+ M, z; m# g% ~" ]to setup-patches
4 E- f3 l, I& X" G0 } [ ask patches [ set pcolor green ]
5 s S; s* A: W" L! ^end
5 O6 F, p5 K! G2 P( B& H& Zto setup-turtles
9 ?7 ]8 {7 D: i. @" b create-turtles 1006 g5 }5 |! U8 r! {; [
ask turtles [ setxy random-xcor random-ycor ]
5 o" m: c+ o. c% \end
) Y' b7 c2 t8 _/ x0 ~9 Bto eat-grass
1 @' b2 h1 z3 B7 ] ask turtles [
, N3 ~5 i2 X/ m; r2 k+ m6 g# q if pcolor = green [+ g" J" ] `9 }7 ^+ E" M( s- u
set pcolor black
& J3 U W" v' _! S5 s! v% a4 N set energy (energy + 10)
8 j- j' n2 F3 a. K% ?! b4 R ]2 m' g8 J* f# ~2 T
ifelse show-energy?9 [3 I7 E$ C* R/ N; |: x2 S9 Z
[ set label energy ]
2 a* b t `" J [ set label "" ]
3 e' S; u @$ w0 r ]" { L' ?* k$ e1 Q
end
@7 Z5 t% ~8 l) Zto reproduce
* Q6 O4 `1 h7 f. y6 @ ask turtles [
3 q: Q! s8 p, ]% r if energy > 50 [5 n5 U+ W) m! B0 }2 z
set energy energy - 502 t8 z8 }0 |% c* } y
hatch 1 [ set energy 50 ]
+ f, k' p" ` D; { ]) B+ c# \9 P- y# H1 N! E
]
! H' |; Q4 L& T+ @" [ E% rend
$ q. h$ g0 l$ _' ]6 Ato check-death4 y, D+ `# f* L+ _' B# U
ask turtles [6 z8 B; P" c7 e, U) u9 Z
if energy <= 0 [ die ]
2 R3 ^& e2 t; x( @+ ?1 ] ]9 W% F9 G/ W. w5 z+ E6 e
end
7 s# X' ~" O# v+ v* W# ~) e8 {to regrow-grass
- K. g/ s4 m7 }+ }" c# t ask patches [$ L* p w% }' P6 j4 }% o: W, a- l1 V
if random 100 < 3 [ set pcolor green ]. J s; M ?# v
]
# {4 k- X V4 m- _- Lend( L- v z8 s# m X8 T
to do-plots
4 d1 h- q5 a; u. P set-current-plot "Totals"3 m3 X. ~7 N2 n3 W& @
set-current-plot-pen "turtles"
/ U+ i% S; m& t$ u$ ~5 h8 e; P" I plot count turtles
1 A9 l3 q- R# N6 j$ w: K; f set-current-plot-pen "grass"
: h# Q* j* {5 e' @5 s0 U plot count patches with [pcolor = green]7 p8 h" |* X" ~& D# G, G
end
" M' n' l; `# O4 o' M$ c可是运行时提示no such plot: "Totals"
! m! {+ n4 X( n* yerror while observer running SET-CURRENT-PLOT
5 [) H8 D8 O+ x/ J8 s called by procedure DO-PLOTS. \; B8 W+ {/ k. y3 a. L
called by procedure SETUP
# n* G: G! e! w( P called by 按钮 'setup'
5 }3 u& |) P( \! M0 A$ Y2 a求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
