我编的程序如下turtles-own [energy]# i, r: v$ l i* M }
to setup
. ]" E( s4 c) o; p clear-all$ S7 {. `! K9 v2 M2 e1 S
setup-patches
0 `/ V5 Z; G E) P create-turtles 100
7 B2 y, ]( n0 S% ]. M' k+ @4 ? ]% u8 } do-plots
# d& X% U1 u; G3 q2 u; V ask turtles [ setxy random-xcor random-ycor ]
4 ~0 O* Z0 I6 E. e4 _2 Iend8 V6 w; Y0 G$ N9 _: X1 E& q
to go2 z+ ]) q) ]# L! ^" K
move-turtles& n z( [! O+ ]1 r8 q7 F
eat-grass
: I. c$ c/ w; ^, N1 D$ J reproduce
8 ]! Y4 f4 U2 |5 |2 @ check-death0 H: F2 i- Q5 d9 A" V2 a& x
regrow-grass
+ E6 z. N) [/ f1 I2 f% C+ M4 T2 G do-plots
3 g% C9 |# \ T7 R/ U% t" Mend6 N# c0 T& [2 C M+ i: [. V2 k' \0 l+ h
to move-turtles _# f. Z" l) t% i
ask turtles [' f0 r+ T. P0 h" R, a6 n
right random 360 B; a; y1 ~# Q, n
forward 1. T3 u1 h9 C/ H
set energy energy - 1
+ g% A/ G1 l' `' f. ~$ I6 k. g ]
/ T8 k! {0 [+ A3 send
9 x# R, { z& H- R) u' c+ [to setup-patches
s \+ o6 u8 D. D; q ask patches [ set pcolor green ]
8 z- V2 i7 y& J: D! v9 gend3 F! u1 ~( M# ~% R$ z1 n
to setup-turtles. k; Y9 L/ Y1 `7 w
create-turtles 100
# k" U4 K& l) g/ E0 o- o4 J, S/ K. R( F ask turtles [ setxy random-xcor random-ycor ]% i# }" d2 q: V. Z
end- Q; D: H/ b0 O# F. _ e
to eat-grass
2 R& i5 w \7 T! o ask turtles [- Q3 k' L- S7 L3 t+ B7 [
if pcolor = green [4 Y7 J6 ~& D+ i) x7 Q
set pcolor black
" V( g( C2 l% e' A- c set energy (energy + 10)# K( J- i+ s x J% z" S% s
]- a3 Q' {. c6 @2 W0 _
ifelse show-energy?
& u7 ~: ^' R7 T. W/ x6 \) K [ set label energy ]
5 l9 u b% v, J6 J2 y0 S [ set label "" ]/ R+ N, m. H! `. R y8 a/ C* k5 \: W
]- P% }, A) ^6 ], J. v+ z
end
2 B0 F( Q3 T6 y' kto reproduce: X. T4 n: ]% }0 |9 y& u
ask turtles [
, c, \* C/ n3 c3 Z2 l1 O' a$ Z if energy > 50 [
/ Y8 L- E+ q: e/ U m& }$ g set energy energy - 50; R# j# e" o1 ^$ B
hatch 1 [ set energy 50 ]
) n3 x% S- h9 e ]; a* H. y6 c0 g, s* `
]
( p8 \: ]# C& W0 \end
8 o f2 q4 o. A4 W* e: S9 tto check-death/ ~: q6 g7 q; Q% V, u- [1 C ?
ask turtles [
) t$ g. ^3 X( }; ^" z4 t2 H if energy <= 0 [ die ]
3 Y8 Y, H+ f9 r, j e2 f2 y( K( P ]
3 m( n6 _ K) `0 V" _end
6 t9 h& l% ~: u/ x$ mto regrow-grass
& V* T+ b2 L! z& i ask patches [
' G7 l# K9 @) s% S! G& g if random 100 < 3 [ set pcolor green ]* g% B! \7 E+ J' v! `- ]
]. m$ U* `+ ?( e8 B0 A9 D4 S# Z
end& p# h% [- C$ Y1 C
to do-plots
" ^% Z1 g! c* o set-current-plot "Totals"' L* n% ^3 k* ^$ O) Q
set-current-plot-pen "turtles"& x3 u |) V9 Z$ i& t. h
plot count turtles) i' }: `9 H, I8 O: y
set-current-plot-pen "grass") I/ F1 P% Y+ n! K
plot count patches with [pcolor = green]
! |7 \7 d2 p& J* z J; Vend% v, b2 {8 u% K) h" s# l5 |
可是运行时提示no such plot: "Totals" U4 F' I" m# X9 w/ t
error while observer running SET-CURRENT-PLOT) d( {& ^4 j- i5 s! F. f7 g6 c- n
called by procedure DO-PLOTS3 E2 f7 Y6 l( @& e. Z- ^
called by procedure SETUP- E' o8 ?6 I6 u# g) t$ Z& ?/ z) @# s/ n
called by 按钮 'setup'
9 L- x' W U. g$ }. N求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
