我编的程序如下turtles-own [energy]) p( O( Q3 r+ w. @/ M* L) M& T
to setup
/ K: S# m6 s1 k3 O/ u* R clear-all
( N6 `8 c# }9 Y/ O3 T0 z setup-patches
0 B9 o- D0 k- o% Q; N8 p$ W9 M, ? create-turtles 100
6 E- a! J9 t" _9 h E# C do-plots
5 {7 O" s* }: P, L4 u' E+ p9 s ask turtles [ setxy random-xcor random-ycor ]
4 Y) n- l& ?# ?0 N9 c Tend% _3 x7 e3 `" t1 {$ d
to go5 Z- q: U* x+ |- `' m8 `% f
move-turtles
6 y9 Q2 U9 E f; |2 e# c/ ` eat-grass
$ I4 o; T/ T2 W$ g5 F4 Z! z0 { reproduce, T* s" S7 N6 T
check-death) v: G. A9 V$ B; h, @8 {( G O
regrow-grass
! Q, {2 H5 E) w do-plots
$ o, q7 d! [7 H3 m" W3 h: cend
& |6 N) X- W, C- e" a9 I( ito move-turtles; v. x" ~4 u9 T/ V( {3 B
ask turtles [2 s/ Q6 l6 d) \% ~6 B, w/ f+ n6 B S, Z
right random 360
+ u- x. i3 p0 ?- I @# G0 u forward 1
. D$ X' c/ d2 y1 @1 V4 @ set energy energy - 1
+ x. g |9 m$ q [2 ~; h ]
" r- x; U4 Z3 V2 Q( zend
) _* _* F' k2 C% `5 [! gto setup-patches
% p7 T8 b8 x* o C; m( }2 D2 @ ask patches [ set pcolor green ]" `4 n6 N: G5 `, R! B
end
}' r' V b9 c6 v' t. ~to setup-turtles% \4 p% g% i% Y0 D0 m O) R$ O
create-turtles 100
2 h, { K* o( [) C ask turtles [ setxy random-xcor random-ycor ]& ]: Y9 t% |% A; H& K
end
* r6 L$ Z1 R" E) g+ uto eat-grass
& m" r' j7 B- _ ask turtles [4 S4 P* N7 B% l. W4 \0 [
if pcolor = green [
: S* H# R* z, V& q+ Q; z set pcolor black
# j2 K: u$ f* ]3 U) L+ K, K( \ set energy (energy + 10)5 n4 N4 Y2 H$ T! d2 T5 b$ C
]$ t2 i5 g9 i9 G+ u" Z9 v
ifelse show-energy?3 J- J/ p: ]. ^: B2 c
[ set label energy ]) c1 l; y' Q8 ]( J8 o
[ set label "" ]
1 M5 N' E9 p: E. g ]
8 D. U, J: w, C. e' p" ]! bend
: H$ f' H: C( p, g5 hto reproduce
- X) {9 Z& P N* U$ i( ?6 C ask turtles [- ^/ A, S, m0 w1 K2 w/ i ]
if energy > 50 [4 ]8 f5 x8 ~$ c5 [8 I4 T
set energy energy - 50; b. F# T0 ~/ P1 g4 f, C+ g8 Y4 f
hatch 1 [ set energy 50 ]- l9 F6 v% ~" \
]6 k d- F0 F( }9 N6 |
]% g& Z0 T2 h. y
end$ M6 u! A0 i8 _- ^2 q( n0 ~) W
to check-death9 G8 k) x! h# [. O
ask turtles [
) I* }4 e. t K- g: I. Z4 z if energy <= 0 [ die ]
/ n: x+ \, c$ I, Z, ?- ] ]# V8 U5 x5 {; D0 _. v! h- T) k6 G
end
* p8 u) y5 D- V# p: h) A% rto regrow-grass* J0 b. j0 U' ]' G1 F# v! Z
ask patches [# {7 b6 K, G/ [- g8 B* Z
if random 100 < 3 [ set pcolor green ]7 h- M* ]; y. b' i6 B" Y" N4 v: X
]( x1 p- J; K% Y' O
end" h1 h9 a- i2 a: y) ~# v
to do-plots. ? e: a) r5 Z3 y( R: J
set-current-plot "Totals"
$ V7 o3 C; t+ `8 y6 l p' W9 \ | set-current-plot-pen "turtles"
( K, _* B% i7 Z. T( m$ } plot count turtles7 {( ?1 F! J1 p( B0 B! r
set-current-plot-pen "grass"
$ C2 ~ j( |0 {3 R3 `" j7 t plot count patches with [pcolor = green]
) } y0 t$ f) I7 o* D8 m% e' eend8 q4 v! s# c* @& T9 S
可是运行时提示no such plot: "Totals", ~2 K# ~" P5 Z9 o5 u1 k
error while observer running SET-CURRENT-PLOT* @1 P* ]# z( w
called by procedure DO-PLOTS+ H5 v% r: B+ f: G7 c; Y
called by procedure SETUP* F5 J! U. F3 U- f# v
called by 按钮 'setup'
4 a* N( ?( F8 z- N. t求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
