我编的程序如下turtles-own [energy]
, P' ^" `7 l; S H1 Rto setup
) U# {5 V& L5 w7 r8 N+ F clear-all
* C. t' S C6 s+ l* C setup-patches
9 h9 I* y/ @/ l/ J create-turtles 100( B K( R' c _) `! \( O
do-plots
0 I8 g: Y2 n0 k& j ask turtles [ setxy random-xcor random-ycor ]! C; h1 `: F& B
end" U; a4 ?- p! p
to go
* h+ u. w. |) n" g- V1 { move-turtles
4 [' Q/ B! P8 Z6 u eat-grass; A1 b( W% V& S% V( f% R+ ]+ S
reproduce
$ }+ `6 [( O( `; V$ x) k check-death" N4 F# @0 |) l
regrow-grass
4 [+ a* W; Z( A' n4 O do-plots. m) p% f0 C. e2 p0 F3 e( g
end- A; k) F* N1 W" [3 f9 m) f
to move-turtles) f& o- ~2 |: L; k8 c$ ?" L! l
ask turtles [
2 u3 D/ o K5 V* ^& U right random 360+ J* N! E" H L" I
forward 1/ b" W5 X1 Z1 _* L/ O
set energy energy - 1
2 F9 U2 x7 T6 j1 i- T0 z ]
0 Y3 X9 s, N4 Q% x3 gend
, r) e! i" X. Y2 xto setup-patches6 b" t' \$ v6 Z0 N
ask patches [ set pcolor green ]
9 ^7 D& W, I/ B' C! Dend2 y, U8 ~$ Y- T/ e
to setup-turtles
U% r( V! L( B! X! u0 x create-turtles 100" G) G+ R1 S, \( y7 E: F
ask turtles [ setxy random-xcor random-ycor ]1 ^1 Y7 I i0 B$ A& i
end, H- `5 B6 m# T* }4 u( K
to eat-grass' Y+ C! C/ ^% x% ~/ F" a
ask turtles [! @; ^+ m O+ k4 ^
if pcolor = green [
0 _5 u* e& P& S1 @% q* [* U set pcolor black
$ X: B0 R1 K8 v9 A& _: O set energy (energy + 10)
" B' b/ r G8 O8 p* g; J ]
1 _) N( t, ~( A# m( _ ifelse show-energy?/ g' n9 v& q3 A8 L( w
[ set label energy ]+ k" E6 {) v+ w
[ set label "" ]* C( O* I3 b0 l% H5 o6 h
]
) s8 E3 }1 S9 h) G. ?0 Uend
6 B" J4 ]6 q# f/ Kto reproduce0 w! S; V" V8 @3 H7 T/ p
ask turtles [
( n1 j3 e# F( Q if energy > 50 [
+ j# e7 Q. B# K; d; p- A/ } set energy energy - 502 F ^! q! b5 L% K [+ @2 x
hatch 1 [ set energy 50 ]. J9 H w: i0 T; B
]' l; \+ ]9 G) b) c/ [( y0 j
]; H7 w: l I! }/ d, X/ z
end
# y3 G& [7 ~* d7 ?& l& Zto check-death
+ T+ _- {2 @0 N, |/ z1 C ask turtles [
) E& s) E1 D! m. W, C) O W if energy <= 0 [ die ]8 m) P/ d9 t9 X: L, I2 S: d
]
9 t- c4 J2 _ z4 @# c+ {end
% t2 B; a0 I V+ H+ ]% d% S) hto regrow-grass
9 |8 t0 K K) e2 ` ask patches [
" z2 B7 [1 r9 ^1 N& J* s* N7 H if random 100 < 3 [ set pcolor green ]
, }# e& l$ [# Q# ^/ N, J ]
8 c" U5 }" j/ {, Vend
! f- _) _( P ?2 Wto do-plots
3 G: F5 T; r) m i6 U. i/ H" W set-current-plot "Totals"
. \6 _7 ^6 Q! U' n set-current-plot-pen "turtles"; b1 l2 d3 F) t z, Q6 p
plot count turtles1 a' O$ J" m. H. [7 c* M" |' Y. w
set-current-plot-pen "grass"
+ \( P: {: }" M) c plot count patches with [pcolor = green]. j9 z+ s3 A* r
end
' x% F( q$ p9 U3 |可是运行时提示no such plot: "Totals"
1 `2 T' y5 `9 I& `) c0 b0 xerror while observer running SET-CURRENT-PLOT
# a* j0 X5 o; Z1 X called by procedure DO-PLOTS5 n$ V9 W8 u0 ^$ `$ x
called by procedure SETUP) l9 \( t+ ?. Y. x: T6 t% g
called by 按钮 'setup'
, I0 j1 H, G. O: h! R求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
