我编的程序如下turtles-own [energy]
& i" T% H# I9 l% g6 l% Q! l- A; ito setup; e0 y) G: B0 d2 R! O/ s
clear-all
+ ^: z2 T T$ P2 w2 K% w setup-patches! }$ P3 e! }! R- Y8 i
create-turtles 100* H8 F/ h) W5 M1 d8 L$ t+ e
do-plots7 W( ^) T8 y- f
ask turtles [ setxy random-xcor random-ycor ]
8 L# E% B; B$ l3 |% i" zend
# g% K7 m. N2 i; \/ Y# c, Uto go
2 D9 h3 ^- i) Z" z: ^ move-turtles
2 i. z* Q P% c$ y( L1 _ eat-grass6 V* z; Y" {- e
reproduce$ R$ n8 s7 h# I9 H2 ?: `; m
check-death) m6 M& X. o1 y1 R, H2 p/ c% H2 U
regrow-grass3 {% f7 G4 ~8 D- I) ~* m
do-plots; Z: w& s4 L% J0 i8 E0 A$ M
end
# O+ s( @1 J3 ~$ N2 X% Rto move-turtles$ i/ y% Q/ [7 v S
ask turtles [, k( o( T$ n; O& K$ |( P- s
right random 360# U: j# x0 [% ?( T. G
forward 19 W9 u9 ~5 U5 ]+ k! l! X5 u9 q
set energy energy - 1
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end- e5 U/ Z6 o* B# Z/ ?7 k/ y
to setup-patches
2 _5 |; p. _# P; K) L# Y ask patches [ set pcolor green ]
7 @3 E" r: _" Q' T3 R1 L& ?- hend/ G6 s- I! V3 A& d
to setup-turtles
( r7 f4 s5 x5 i6 P$ o create-turtles 100# a2 F/ W" z$ r* B
ask turtles [ setxy random-xcor random-ycor ], u# A, ` w4 V5 X' v+ T7 ~) O8 z
end
; p5 }; ^2 {% o8 f" dto eat-grass$ E6 j5 H4 Q' S3 ^! c- X' j
ask turtles [
+ g0 {3 A- v, w6 a8 U# H if pcolor = green [
- {$ u. R ~# r, h. h& p3 `: W set pcolor black1 u& b% S2 z5 Q' T( O) {# h$ V
set energy (energy + 10)
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ifelse show-energy?
* k g+ C& `. T9 ]4 r [ set label energy ]
% Z" Q, d& ~* ?9 i- ^* U6 T% u [ set label "" ]9 q. h2 i1 d7 S
]1 }; w6 L7 f: b8 C0 q' n$ O
end6 G5 w2 T; z0 M8 s" l& c
to reproduce
1 J5 x6 u$ k- U; {1 x7 }" M$ n: B ask turtles [. s) V9 `( H2 ]3 i- S
if energy > 50 [
, n |5 m+ j1 S, Z o& E. [ set energy energy - 50" ?& { s S1 H4 {6 }1 G5 \
hatch 1 [ set energy 50 ]
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]: @' L2 r w8 N* I
end" O" ~" c' e$ Y& V* |
to check-death
. J5 B) \' j; b% W* k ask turtles [5 I8 P# n, {( I0 w$ @ U
if energy <= 0 [ die ]' q @0 q q. F# x2 \- m8 d
]
^! Y2 s$ Z! U z2 Oend
! v+ v* N& h0 i, V! Gto regrow-grass4 m2 f4 |" q% V+ w
ask patches [1 J9 m8 f/ u y0 H! S( O: p" t! l
if random 100 < 3 [ set pcolor green ]
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end; {; q8 f9 |; @
to do-plots
# @ q& Y9 L7 F9 s* X7 ~ set-current-plot "Totals"
* m4 o$ I: r8 }# l4 K set-current-plot-pen "turtles"
7 H/ j9 b- N h. n. p0 k plot count turtles1 G. J8 a( Z' w
set-current-plot-pen "grass"
6 ~# ? }* Q$ f* T; r% |" f plot count patches with [pcolor = green]/ T% R3 z9 g' ~" {* `
end
4 [( ^3 j9 J& o9 d可是运行时提示no such plot: "Totals"* w3 d) l0 f5 K2 _
error while observer running SET-CURRENT-PLOT
# X: p. p0 x4 C( Y5 v* {: \6 J called by procedure DO-PLOTS2 D# P4 E) J+ h- t5 x4 U
called by procedure SETUP
+ p( o: Z" z: |# c1 A8 ? called by 按钮 'setup'
1 g. U4 x, I- _; C6 c$ c求大神解答啊 |