我编的程序如下turtles-own [energy]. o2 ?+ ~& Z. X/ g6 R! {2 K4 `
to setup
* a6 w: q* ^) C y8 m# W$ t* ? clear-all( O9 R7 J2 @+ R2 H0 a
setup-patches
8 [) h; J* Z# z$ g% [2 N create-turtles 100
* [- M: T. A% W. }5 ~" r do-plots
7 V, P9 I1 a8 m6 |# ]7 Z8 O ask turtles [ setxy random-xcor random-ycor ]
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to go% _9 l8 j! c3 W) n% C
move-turtles) i* L8 Y; h: n# f3 W& ~
eat-grass
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check-death. W& i" _+ Y3 U9 ]( W& o
regrow-grass
3 i+ M6 M, Y1 J: i% X- S, L do-plots+ z7 ~4 L! H5 L7 S% h# K
end% {+ X: j! p9 D
to move-turtles
4 H, B* X4 a' q) h, b ask turtles [
+ h, i( n+ c, K right random 360
4 f3 I2 T* L7 d. x* ~9 e# l forward 1
' o4 r/ T: _( w0 S( l set energy energy - 1 z5 C; r3 _8 Q
]
& j+ ]# E0 u. D; t! ~' Aend
& H+ d7 h- u4 O4 o& ?" H2 g% v/ {2 t& Uto setup-patches. H7 ]* [' @' n
ask patches [ set pcolor green ]
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to setup-turtles
! q% B ~( t1 |8 h create-turtles 1007 U! ^! s& D& d
ask turtles [ setxy random-xcor random-ycor ]. i% ~8 B7 x$ x1 \7 ^
end
# ?" o% s8 G$ n+ q1 _# y" }to eat-grass
* G2 q6 W4 A) `) G ask turtles [' a$ {" r+ L, P7 [; u) Z! [9 ~
if pcolor = green [/ |$ e3 U9 E8 R) K% ? T
set pcolor black1 v6 a0 H3 S) p5 d" N# K" }" y
set energy (energy + 10)# Z( @& ~1 E9 a5 h
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ifelse show-energy?
. |" q7 Y, A1 V* j% b. e- | [ set label energy ]; V( U2 n2 r0 q% C- e* o. v4 Z
[ set label "" ]
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end
8 X3 D6 S5 d: v/ G- O/ H) C& j$ Gto reproduce8 s2 T% a( I* h
ask turtles [' F, ]: p" f. S# R
if energy > 50 [* k" C B! B0 P8 [( M1 _! ^
set energy energy - 50
* R+ g* ?/ `; m: e+ ]: C3 ?4 } hatch 1 [ set energy 50 ]
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end
& {( ^6 r3 q2 f1 y5 g( f J2 Ito check-death( J4 K9 y. E- \, Y# f
ask turtles [8 a7 H6 }* U8 v7 J4 |8 ~ e% X4 D
if energy <= 0 [ die ]
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5 N" g' V/ J) }1 Q* ~end0 x# R# i1 g# H3 k' C5 b
to regrow-grass
h1 ? b0 O1 e ask patches [; p4 `. {* h. v [/ n
if random 100 < 3 [ set pcolor green ]
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end
" E* h5 z2 W$ [; u% bto do-plots
8 M0 w5 e9 A4 q set-current-plot "Totals"$ `1 g. p K7 C
set-current-plot-pen "turtles"" M1 ?5 J% ^" m4 y& q/ X# i& z
plot count turtles9 c/ Q! g* G, n- X4 V* K
set-current-plot-pen "grass"# M6 _' \" g( f. ~0 ]% A
plot count patches with [pcolor = green]
e0 t9 O7 m: A# R8 v# ?& g* a& ~end) \8 D& i# L# e5 k1 G1 T
可是运行时提示no such plot: "Totals"
% f& H# T) ^" P9 c& ?error while observer running SET-CURRENT-PLOT4 k7 S( s- R/ B4 [. [4 K. ?
called by procedure DO-PLOTS4 [+ _0 ]6 \7 [* E% Q8 E% m
called by procedure SETUP
8 p! R) X, ~& |3 H) i, p called by 按钮 'setup'
' R7 m1 X9 V. u/ P s求大神解答啊 |