我编的程序如下turtles-own [energy]0 g# b7 g+ F' B6 t$ h7 C
to setup
/ d u. W$ j" c& n clear-all
9 L) c7 ]0 e, b: e setup-patches
2 a) d, n9 U4 _; h' e$ o create-turtles 1004 D* b) S. ~% b* ^
do-plots; r2 G* ~- P% y z Y: e0 n
ask turtles [ setxy random-xcor random-ycor ]" D( F5 B0 }$ D7 U( ~! @
end
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move-turtles
" |' B- K6 O! |" m eat-grass
$ U M4 K0 }' ?, p reproduce
& M- V# w H. b- l# r check-death
6 z2 V% F0 E) R- g regrow-grass/ U3 ?# x1 w- X t. h) J' j+ j
do-plots! K) }- @/ ]3 S* t$ |
end
& t4 d/ z f# q; C& ^8 ~7 @8 Bto move-turtles9 A' H% Z- j- a7 v/ V. P
ask turtles [
0 I% P: A* c, G# _ x, l right random 360
/ L8 C7 J' d4 ^9 \# _! k( y2 ~ forward 1" L0 j! z5 l8 O
set energy energy - 1
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( t7 q8 r! O% h$ S0 N; I# @" eend
0 y0 X2 N' n2 b3 Z, k1 xto setup-patches
6 V* u+ {7 a2 N; S& r$ }% r ask patches [ set pcolor green ]+ \7 t, B' o% C& L8 o
end$ w# X: I1 \# \# [
to setup-turtles
+ z% W8 @) `3 m) ~" q8 A# ? create-turtles 100
- m) _4 c3 U2 |4 K1 K ask turtles [ setxy random-xcor random-ycor ]/ X/ l8 t `4 I J
end
* @, x* }' B( Oto eat-grass
( _2 R) ]" P3 v% [ ask turtles [/ T/ V5 u' ?* ]! g M" J" Q
if pcolor = green [
& P/ E' c2 i1 o* d set pcolor black
/ p/ u: K) W3 j3 }+ d+ K1 h, l set energy (energy + 10), j" D6 h. v0 N
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ifelse show-energy?
# Z, `! m, E' Y0 R- D( z [ set label energy ]
3 z' N( J* v Q: g$ }; B6 y [ set label "" ]; q" S8 ~9 |5 V1 Z. T7 M
]2 E7 b3 v3 m. N, h% E
end
" C8 D4 }8 [) M/ T- uto reproduce1 w( L, ?' y0 j( c8 J& ~: X# t1 J8 I6 p; q
ask turtles [$ ]2 L7 Y+ E2 f% I5 j' l1 E- y: H
if energy > 50 [! j" i8 [6 S# W0 i c
set energy energy - 50
( _3 K% Z, L& m% M" v8 A1 u hatch 1 [ set energy 50 ]; ]3 [1 L/ p# r$ a* [/ {
] H7 t6 }6 x# f( l/ L* \# t( h
]9 N( n' B; `1 c- ^9 N$ i. M2 {0 i
end/ X9 A* r: @. \% l: x1 \
to check-death. Y3 `* u. c4 ?: M2 n/ Q2 C8 d
ask turtles [1 q4 ?! S2 y# O- m
if energy <= 0 [ die ]
9 K( C+ I. G" }: K* Q ]
5 n1 X5 x3 {6 Mend
; D- g2 Q; x! K# t0 h' M6 L$ Ito regrow-grass: ?) E" v/ Z. t
ask patches [* D) f0 o3 k9 j; c D
if random 100 < 3 [ set pcolor green ]
& D' [, L% E; e+ q ]
# F Z/ j9 U4 u" z2 Dend1 Z8 W. S: o4 b2 d% z
to do-plots4 h4 T3 ~, G3 J# e
set-current-plot "Totals"
$ n" @! N K( Q N# `# z set-current-plot-pen "turtles"
% \ d" g- z% V' j/ v' l plot count turtles
$ K7 X. q( n& f set-current-plot-pen "grass"/ D! r) P0 ]9 r6 F
plot count patches with [pcolor = green]6 `9 t5 u0 q7 q$ G# p7 _
end
. S* F0 t# B, E3 ~. M可是运行时提示no such plot: "Totals"
) G2 F. B, a3 M7 L2 perror while observer running SET-CURRENT-PLOT- B6 V3 H& U3 d$ _5 H( \
called by procedure DO-PLOTS/ o3 z4 f3 W* I" r
called by procedure SETUP
0 ]0 T0 x8 |3 J4 m2 z4 U; h called by 按钮 'setup'
% V j* X( r, R4 h5 F; m( v C求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
