我编的程序如下turtles-own [energy]1 V5 z6 O) k+ b, h, o
to setup
! T& r, }' @& _4 v9 ]! I clear-all' ]. c: r4 E* [5 {% ]
setup-patches' P# C3 @2 { N- Q3 k' s
create-turtles 100
5 t# G7 u0 h2 @! c8 J6 \ do-plots
: a9 c* b! d! j" H ask turtles [ setxy random-xcor random-ycor ]% n2 c8 S0 b* k9 W+ t0 q
end% r0 j! }& J' ?, G
to go/ r, `. Q9 f# E/ W b) n1 n5 i
move-turtles
. p8 k# q) C2 y2 o eat-grass7 x- q" l% C4 r" v' ?0 p
reproduce
0 p6 l2 l. @( P8 d, B2 i check-death j6 B* {$ I f
regrow-grass
! @. ~2 o/ Q: D: y+ V% c- U9 S do-plots
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to move-turtles
7 ?! S5 u6 ?( O+ c* h# _9 X ask turtles [
( D5 t5 z! B+ A1 z1 U! E+ R right random 360
+ F0 s$ F6 H# x, L forward 1
7 H' x) j: h* U; d& d$ Z8 z set energy energy - 13 ?) x# t! h& C( _$ L# U
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end
* u5 B7 I: ?% }: yto setup-patches9 ^( Z/ \/ u8 j8 G$ u/ O( B- A
ask patches [ set pcolor green ]
" I! e6 D) m& P6 w8 xend
) U( F" _ G' T" Ito setup-turtles
& C) R" e' Z1 S, {' J create-turtles 1008 y, b; S) l* V) S' E+ w
ask turtles [ setxy random-xcor random-ycor ]. W# n, b/ |! M& S4 t5 W
end1 {9 {- l. K e1 q
to eat-grass4 [# X, ^6 o5 k2 k" M
ask turtles [
" V' N' @% z) r2 z8 h) y if pcolor = green [( d9 \: K' E$ t1 k
set pcolor black
9 ?1 |& L& o( N4 o: j& s' ~6 }: L set energy (energy + 10)
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ifelse show-energy?
5 t5 r# K, @( B [ set label energy ]
$ z) F* f6 e1 y: R, @ N0 ?1 y7 G [ set label "" ]- k3 W: Z2 p( I& k: y0 r% G
]
3 B5 G# s+ c; N) aend3 s' C) ^$ o7 w" q0 z, |
to reproduce2 ^, e% ^& T' a$ o5 A# y5 t
ask turtles [
# T& [' u1 x% O! }5 }, z% r if energy > 50 [
' D$ h: O$ H" D set energy energy - 50
. j% G7 w+ `. m+ a) ]4 n! Z1 K: @ hatch 1 [ set energy 50 ]
. l2 s! o: O/ {( R# i: L ]
. R. p# U+ C+ Y( u! @% }7 m* _ ]
: i7 ^% ]" }. I0 K2 send
0 j$ L N" \. @1 u: @: Vto check-death4 Y: u- S/ H4 b# F" |
ask turtles [
) e4 z/ p" T- {: O if energy <= 0 [ die ]" j2 i w4 v/ S: w4 H% K$ A
]
, \) z' M; _ T' {: K/ O" pend
$ J6 T! ~" Q% _- h# A: f/ D7 g. Zto regrow-grass
O/ B& i) t- S/ v3 E: a ask patches [
6 A- F2 C2 ?; V5 _8 E J if random 100 < 3 [ set pcolor green ]# m* i% z- }, X" {1 a
]8 Y! Q% j9 P+ R! v" f
end
1 B) d- ]9 [3 ] F8 u& I% h+ Vto do-plots* |; k& @) H7 y. E: U5 B Y
set-current-plot "Totals"
1 H Y: e6 F9 R1 G$ V, g set-current-plot-pen "turtles"2 T7 K- e1 }8 i$ E) @( e
plot count turtles5 Z) \0 q* A' A' b! L
set-current-plot-pen "grass"
1 }# j. I0 A. i6 h Q0 H4 p6 q plot count patches with [pcolor = green]* }( m, S) z5 L8 Z
end1 a) A' r0 e1 B' F
可是运行时提示no such plot: "Totals"
. i2 V* m# Y a0 o- n* Qerror while observer running SET-CURRENT-PLOT `- m. h y7 c
called by procedure DO-PLOTS3 M( S: ]1 N0 u# i: ~5 r# g
called by procedure SETUP
$ C# V# `6 X- y6 V0 d called by 按钮 'setup'
* x3 D, o3 c$ l3 n& L5 f1 ?1 z求大神解答啊 |