我编的程序如下turtles-own [energy]9 z% r0 R$ K2 t
to setup
+ d6 m# P+ d: y" F: h, F/ Q* s clear-all
" e! D3 P, V% u0 ~6 u' W+ L" A8 n setup-patches6 k* ]# H* z8 Z7 ^8 G
create-turtles 1003 U$ r [! x) m v; Q
do-plots R! U b: V$ G6 s0 h. t
ask turtles [ setxy random-xcor random-ycor ]
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to go
; L! ?# G( O4 W8 i3 D7 C move-turtles) ?8 J& X& u2 l8 U
eat-grass
2 f/ S+ G" H' J) g- S reproduce( {; }4 ~$ H4 B% v9 H
check-death
5 j T* u/ Q4 d regrow-grass
3 a2 g& t. x- n4 W# n( j do-plots
4 p* N' ~; G- Aend
n- W: V L, K) A5 [, l Nto move-turtles
7 X* `% |* t1 a) o- j# u4 S" E ask turtles [
. o; H) t4 g; U- F, Q8 b! g right random 360/ @+ s; Z; d6 U6 ~
forward 1& Q8 U! q% B. w1 c
set energy energy - 1
8 O! |4 t$ F% P% S2 ?) l) e ]
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to setup-patches
+ _' D7 d: G0 I u" ? ask patches [ set pcolor green ]8 Y& F- G3 r) k/ c5 C# {) u
end
" s3 t# e% d Z b. m( Gto setup-turtles* K8 p. R& {% Y2 [
create-turtles 100
9 O& \, n+ h1 Z/ ?6 z ask turtles [ setxy random-xcor random-ycor ]
: P% p) F; n( c! b3 u- V5 f3 eend2 g5 @7 }# S0 H0 K4 }
to eat-grass7 Q- g% F" `9 r. V' d
ask turtles [. l3 f4 u1 ]- g' z6 y
if pcolor = green [" g4 E% J* W& }( b; ^5 a7 t5 j5 d7 r
set pcolor black
& z9 F6 ^: G; S! P! J set energy (energy + 10)
7 k% J/ X* X1 c" V" W. t3 F ]
' d- q' Y y# K ifelse show-energy?5 K4 H! A+ \! x
[ set label energy ]5 A: m4 ?) O" W# t! ?
[ set label "" ]; I7 ^7 p, D3 U( T; j
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end) d8 p k, g- K r6 \& G
to reproduce
7 N9 C. o% k4 A# K ask turtles [
( C# W" M% Z7 P. h0 C d if energy > 50 [
) W: Z& _: c' x; n* ` set energy energy - 50
3 w+ }9 Q" Y m% [% Q1 k- \2 x! z hatch 1 [ set energy 50 ]
5 z1 o/ G6 }8 ~3 _ ]% \$ u3 D, Z" D3 W
]
) ~2 [& B2 o/ E# ]$ P$ qend
E; q2 w4 X3 yto check-death
2 S3 w8 t* W5 i2 E! t ask turtles [7 f9 l; b# d6 y8 A+ ~# v5 V
if energy <= 0 [ die ]
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end3 K [, g/ X& j* x' i
to regrow-grass r0 z% M5 h& [4 z9 y
ask patches [( M) w- V5 n+ H* k8 O% _% f0 n
if random 100 < 3 [ set pcolor green ]
+ A% ^/ n- k2 d- @3 A ] k' E5 E8 m% T& `5 w" l9 c
end
9 B+ W# I* X: F, `* Lto do-plots/ i9 R# v" q2 i7 l, j' z6 y
set-current-plot "Totals"
$ |) c: y1 ~4 A( \+ U: a6 ~( [ set-current-plot-pen "turtles"+ Y! X5 b/ m* m: {& D
plot count turtles
7 l2 S# l9 y; p set-current-plot-pen "grass"1 H( t6 k6 ]: U# h& N% r* H: d" g2 G
plot count patches with [pcolor = green]2 ]7 X, [7 V4 Y0 _' H) ~
end
6 ~3 q+ f- u" r/ @& V/ H可是运行时提示no such plot: "Totals", {% f- w, F9 `
error while observer running SET-CURRENT-PLOT2 h' n5 Q2 @% ^) s0 X9 n
called by procedure DO-PLOTS
u$ X' u3 x' A0 s) | called by procedure SETUP
% P9 `% d' R t/ I. ]* ]- D9 k called by 按钮 'setup'
; m ]$ O7 _4 f% Z) ]9 V8 q4 j求大神解答啊 |