我编的程序如下turtles-own [energy]
: D. _4 d" f* i; ^4 cto setup2 [3 P3 H( d( i l
clear-all
U" S$ V a6 u. B z setup-patches
3 T2 S4 f* ]+ G6 w0 a create-turtles 100% Y3 F' A; b- f
do-plots
. u$ I! W9 [% q. _# L- {' G- e' c6 Q, { ask turtles [ setxy random-xcor random-ycor ]
9 s. y& V9 n$ i! r$ z* _! ]# Nend
& u/ t+ W( _6 j Nto go; Q7 C5 x& o/ k: Z) m/ E. ^( k4 P$ Z
move-turtles3 p: X( t% v' o# R
eat-grass5 x/ b" ]$ y# R Y2 C
reproduce
L* c+ b+ u3 J% B0 S check-death
8 b6 S( y- S, _, l0 o, d regrow-grass; w6 {9 `4 }$ w' u: n
do-plots
/ s q% v/ B9 B! Eend
- j( ^4 s6 |1 Mto move-turtles6 {, n4 V) s% X+ j. G; R- |
ask turtles [
5 A9 Z. f; l- ]5 t) \ right random 3601 B0 b0 r( V g/ Q5 b8 C
forward 11 ^4 Y" n/ b/ l, }+ {# G
set energy energy - 1
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+ W# w4 B% } C6 |4 }) iend
! B& E5 Y* m2 Ito setup-patches- ^; F. i( N K0 _, V
ask patches [ set pcolor green ]
9 v8 I% a" I" ]0 }, C* ~end
& v. B( |# I$ d; Eto setup-turtles
! t, I: e) w! C, u9 r+ b. Z create-turtles 100
; X; l8 @$ N2 y5 m ask turtles [ setxy random-xcor random-ycor ]8 q/ K# |' {1 Q. o) D& `
end
$ t% }3 `; h) l+ B1 P* ~to eat-grass. | o+ }& @9 V
ask turtles [- C- U3 C$ V) }: h( K( l
if pcolor = green [
- Z. ?' a5 |; b- t# \* x2 X set pcolor black
2 r6 m. M2 p1 i( W9 B# M5 I set energy (energy + 10)
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ifelse show-energy?
* {( \ o+ N! ? [ set label energy ]# P" ?$ t# l# o+ e" a* T
[ set label "" ]4 E4 J. ?) C& ]( |1 e X( m6 q
]/ i( X- e. o1 N
end
6 u r; }( |1 c" z! @to reproduce+ S" |& [6 K# S* V8 M
ask turtles [* t% p2 f5 a0 u
if energy > 50 [4 U) @& m8 T) q7 T5 D
set energy energy - 50$ z; X. h6 e! c& H
hatch 1 [ set energy 50 ]4 }5 B9 j/ Y6 `% F `3 D
]
8 N! s/ c! N* `) z: J* k ]+ T3 f& Z8 Y3 H7 ?: Q
end
( z3 T6 e+ c* M0 x0 Eto check-death
5 P+ u! }/ p" X8 ^' I( h# e* G ask turtles [+ h" y3 o" _% W s, i
if energy <= 0 [ die ]
- f U% Z8 ]# f' }- L2 v$ B G* v ]
* L/ c' N6 d& ~7 G" ~end7 _4 N+ }& I* E% q, _( P ?8 r
to regrow-grass
" N7 m) ] w7 ]. W: m. {0 C' _0 q ask patches [; p' m1 h7 }+ p8 `) p
if random 100 < 3 [ set pcolor green ]! m0 s$ x! ^9 k& y) L c! h2 C5 q/ q
]! n0 R# s! p3 _
end
# G9 h# ^; l1 dto do-plots3 `7 c& I4 G. j5 R0 q: g
set-current-plot "Totals"4 q7 h& P3 O b: P# `6 B
set-current-plot-pen "turtles"( Z1 q$ d4 A% L' X- N+ C' h$ Y
plot count turtles
' [- F" m, e. j' a$ m$ T) } set-current-plot-pen "grass"1 z# r5 [6 w% f& g; t" L" I
plot count patches with [pcolor = green]
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可是运行时提示no such plot: "Totals"
6 w1 _; m8 B6 n- I/ aerror while observer running SET-CURRENT-PLOT
+ T* |- {; |9 ]" r1 q2 q* b called by procedure DO-PLOTS
3 K; J6 s. [( H2 l% a- R( S Z called by procedure SETUP
) j/ e. W- N# C% G2 u& ^/ T+ ] called by 按钮 'setup'7 Z# d4 p7 @0 S n4 s
求大神解答啊 |