我编的程序如下turtles-own [energy]
7 G7 e( j3 x) Z7 n# N5 g/ Uto setup
; x9 b9 H% W1 s/ ^ clear-all
- ]) g4 R8 }$ Q6 V1 S- w setup-patches3 }$ O! D! I" t; t# S' b( A) j
create-turtles 100/ x; Z0 i( h' @0 `- k
do-plots
+ O. Y( q5 Y6 Z0 C! K3 U; U ask turtles [ setxy random-xcor random-ycor ]
1 d9 B. c1 ^: P$ ~end# Q6 W) Z j2 t% ]% G
to go
/ a* h; _2 G2 o' Y' H move-turtles
2 R! g& l. z# g/ I0 M eat-grass+ b' I$ N1 i7 p5 [
reproduce
5 G' Q4 R% `$ S% f check-death
$ i5 y3 y; F5 w7 H$ \. x4 H regrow-grass; l& Y% G$ R* h1 j/ L( v& v: T# ~
do-plots( j2 l2 o; W2 w8 S2 j' c' f$ ?
end
8 c9 M% Z, }' i _' S" Lto move-turtles4 ~% G2 R/ T- m1 B f" L
ask turtles [1 u5 H z! m7 r
right random 360
% R9 h- O9 T! m) m X forward 1* _! o# Q6 p3 U- v
set energy energy - 1
: w7 L4 N5 u7 Z ]
: S c, q/ J3 E- E1 v' W, K% l! Eend
& |% G/ `) ?4 _5 h6 E3 s; J/ Xto setup-patches
& T: [' f6 |% |, _' e& Z ask patches [ set pcolor green ]
* P! r; u! Z3 Z8 P+ y. X M9 mend) z3 t ]# P. W$ ^
to setup-turtles
$ \/ _( Y3 J* j8 K create-turtles 100
* E- \/ d: h0 Y9 n( b# A ask turtles [ setxy random-xcor random-ycor ]+ x [7 T' y3 t
end
% y4 ?" f+ s+ \9 @, N3 j5 oto eat-grass) v- x$ X$ ?" H+ I6 V* n
ask turtles [
) d r1 B( |" X- U; S3 ^, r- c- O. q if pcolor = green [
6 E6 L; Z& {1 c( ^2 S: Z* M set pcolor black
9 [1 ?" M5 P, V set energy (energy + 10)9 P$ h! S9 h* B; k+ K
]
$ w; v9 \( y+ y7 W/ J ifelse show-energy?
) v& b+ s+ V2 h- \: L) h [ set label energy ]
3 U( b. W6 d: }6 `7 J( c6 D [ set label "" ]
* ?* t3 N+ t6 S/ e3 i/ ` ] Q6 s& @( `, \0 x' s* W8 J8 O1 h
end) j1 Y. ?9 L9 J/ S8 x8 X
to reproduce8 M1 S; F" d& m& l1 i1 E. Z
ask turtles [
. a1 w/ G# {) C& r) H6 T9 U if energy > 50 [
& ^# t5 K1 S* E3 \; A* Y set energy energy - 50
. M; P0 Q! ~; x' p; | hatch 1 [ set energy 50 ]+ C [2 g3 L* u" U- W
]
7 r, l' y r+ I8 l( k A0 [/ O ]* G# t+ v: G; x) }" Z6 D: f
end2 Q+ F7 `. \/ i
to check-death- c* ~/ x( p. V) `
ask turtles [, F- ?: r5 ] D& [7 c+ \* f- r4 A
if energy <= 0 [ die ]' b I2 D7 A5 G
] `0 ~6 b# W& B$ B, j1 C/ o! ]2 |
end2 I, f9 T. S# c" E9 @
to regrow-grass
0 P+ o( H$ K7 Z/ _9 p1 m- O8 w ask patches [# C* o: Z9 Q5 M F1 ~* m
if random 100 < 3 [ set pcolor green ]' K/ Z: U% D- y& L0 g T1 |
]
4 W8 ]( E0 ]- dend
$ w: Z8 S P% h; H1 z* Rto do-plots
6 b) H' ~9 u0 c- A set-current-plot "Totals"1 _2 m% w8 ?( T, o
set-current-plot-pen "turtles"$ n0 Q: S! h n8 i; e5 y2 S
plot count turtles
( A: }4 n. H( O- U9 {5 l set-current-plot-pen "grass"/ t4 V6 k* L; |6 B) Y1 B
plot count patches with [pcolor = green]9 I/ e" \1 G g
end; G3 s/ I; Z' o: B i" H2 L1 _
可是运行时提示no such plot: "Totals"
8 V8 H% `6 G v nerror while observer running SET-CURRENT-PLOT: `! k7 p3 l- W7 A) O, [2 n
called by procedure DO-PLOTS! a* L2 m" A, f( H3 o2 m0 z9 H
called by procedure SETUP
' G( g+ w; x# O/ P4 o9 a* T called by 按钮 'setup'. i. ^( G# u# |8 m$ q
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
