我编的程序如下turtles-own [energy]
0 f- {2 C8 j7 w& b Vto setup
8 S" }# c2 X, F; } clear-all
# _# J% i) O& G0 y5 h setup-patches- x# w2 ]( }; z, S# }
create-turtles 100
# ~. g, t s$ w" B; ]+ k. l do-plots
" ]- b7 F/ b) f* w ask turtles [ setxy random-xcor random-ycor ]
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to go
* v h5 O$ L; {; l4 O move-turtles% e9 M' a* s, e; ~! Y6 J9 F: G
eat-grass, P. Z1 P. H- I4 k! N& S5 v
reproduce5 D$ g7 H( D9 K5 c
check-death0 I5 O/ }* P& Y5 U3 B( v
regrow-grass
! {# U, g6 [$ q: b$ \5 [- x3 \. k: D do-plots
8 h: v/ {- h. X- E- pend
( @4 ] L0 f+ d* Q4 j# |9 Fto move-turtles
7 U& p8 `3 M: I+ b: _3 {9 N, T ask turtles [
4 H4 w3 c1 Y5 p+ B# \8 p+ f2 W' w right random 3604 } v5 z. `4 }+ K; U3 K
forward 11 F, f& Q5 Q; Z# T i, C: F
set energy energy - 1
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( W* P$ _! K4 U% |7 S7 i A. \3 uend
- P! t( l V x& E1 ito setup-patches6 j- r. v" e o
ask patches [ set pcolor green ]& i3 c& |1 q5 ?, g5 c3 w! D; s# o
end( o" K+ v6 G3 F$ ~, x# J" g) p" a
to setup-turtles' ^4 C+ h: X& c" ]# w
create-turtles 100* J! l0 m3 O/ N. | H$ C% F4 t
ask turtles [ setxy random-xcor random-ycor ]
8 Q0 q, @' }6 f- y5 jend( l( h1 m) q3 ]( a3 i$ E3 L
to eat-grass
$ p k4 x, r# X ask turtles [; t8 S% A. E0 j% x7 o4 ~& n2 m3 X
if pcolor = green [
* V( V, T. [" S. X( p/ A2 i+ @ set pcolor black
0 L+ I& `" u/ o2 J {6 i+ P set energy (energy + 10)) Q( |; D: [8 \* m, |4 `
]
1 y& P/ h$ F/ i2 M" D8 F/ @ ifelse show-energy?9 o! Z6 o. A% R& L/ e
[ set label energy ]3 K. ^4 t* W! o5 x7 }( Z
[ set label "" ]- E3 ?+ s9 ]! |2 {+ Y, f0 Q. o
]
" D1 G s4 h# x/ S% I- Tend+ p" ^! {, q) [, ?* i8 U
to reproduce ^ r% E, T0 m1 h j4 P# ~+ O
ask turtles [
9 h7 c5 o% _( N: i' U8 Y if energy > 50 [; f p$ Y/ E( \
set energy energy - 50
+ L8 V# }$ b0 G# L. s! x hatch 1 [ set energy 50 ]
3 w9 [" c* D& f9 W- d9 R( E0 j ]
) \4 i1 O. g# `, ~( l ]
! L4 J) R7 g' [# V) rend+ S1 o7 u, s/ S7 m8 I
to check-death( l! b2 h# }8 }
ask turtles [
2 N6 a* [ l; w G2 T if energy <= 0 [ die ]
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to regrow-grass
% ]( w/ P, j- \7 I) f ask patches [8 E1 Z9 V( S1 u- } F9 J
if random 100 < 3 [ set pcolor green ] M3 \2 n$ e5 D3 d+ v8 x8 w
]
9 F( {! c5 X4 o4 q# f) R v5 vend
; ~! e3 X2 H& c! Oto do-plots
1 Z- k% }3 X6 h) r4 m) R set-current-plot "Totals"
; b7 i4 ` ]" i6 ^ set-current-plot-pen "turtles" t/ q6 B3 c2 Y
plot count turtles3 E7 V7 _0 H* L
set-current-plot-pen "grass"
. R# B$ ^. l. H% f" T plot count patches with [pcolor = green]
2 K3 D4 V a. @: Pend E( c r# ]3 p1 L7 K, p
可是运行时提示no such plot: "Totals"
J, d/ K7 [; ~ Y& {2 M% |, Aerror while observer running SET-CURRENT-PLOT
0 d) s9 F. V6 f: k* [ j" e called by procedure DO-PLOTS
! \7 J) u( o; b p# _ O2 R: R called by procedure SETUP5 |" O* z: T7 {
called by 按钮 'setup'
6 u4 f+ c9 L- V8 d* D求大神解答啊 |