我编的程序如下turtles-own [energy]
! ?, w# P7 \) W7 X2 Vto setup% ?( T& r' m* V ~
clear-all P/ s: ], [# n4 u+ R. g
setup-patches7 G F. V* a) _* U7 p! R
create-turtles 100
0 D0 a( x+ W7 _9 A do-plots% `/ ?$ m$ p3 y) |, G: H! d r
ask turtles [ setxy random-xcor random-ycor ]( s: o0 I7 v6 S/ J. q
end
/ I* n+ t, R6 Z* ?) ` tto go- b+ R5 V6 s% Y: x l( g# W
move-turtles+ P0 [" j8 z5 z- p0 O
eat-grass
( x0 b% v8 @; G reproduce
5 _6 R$ u, u0 K5 _ check-death
$ f2 X5 }5 M" K% R- J# z8 l3 @ regrow-grass
Z# X/ N; U( D! C7 y" I do-plots
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to move-turtles. E: q6 e3 I! C2 {& K
ask turtles [3 M, l, G* o4 R' l9 ~. Y
right random 360
4 r& M. s( P" H0 b forward 13 p& b5 }6 l1 c* L$ O8 C. @" {* g
set energy energy - 1
$ L8 q2 E) j& ~# J9 } ]
( r) k" E. a" _) N9 ]- t6 f5 fend
) ]1 }9 d9 y$ R" q8 [/ t4 ?' a2 w! fto setup-patches
2 H* k! k& E$ n1 _- V ask patches [ set pcolor green ]" e; |. E( f6 v0 l7 H; b
end( z- A4 V/ A+ D' O. ]8 ~
to setup-turtles3 v9 l5 ~1 J& }+ d* M
create-turtles 100
- F7 v7 k8 w+ S2 m [, g% u$ Y+ ? ask turtles [ setxy random-xcor random-ycor ]
5 t+ H) p" o# Z. nend$ `& m g( d9 F9 A( b7 E
to eat-grass# }9 k6 o4 k) O1 `& z
ask turtles [, m1 F. ^2 K7 f( F Q6 C T; R. g
if pcolor = green [
' n+ g% O; [+ B- b set pcolor black
# m8 C% l" N. F* k8 G set energy (energy + 10)
: L, z; }+ t7 P0 C# q ]
4 E* F% k7 C3 `3 V; ^6 F ifelse show-energy?
9 Y, @+ G2 W; w5 l- f7 s [ set label energy ]
& }( a7 t* a4 G, c$ ?) x. s [ set label "" ]
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q; w5 }1 W& }, p1 _" dend, H+ H- E+ B! A! l- q: k
to reproduce X4 ~% p0 e! T
ask turtles [
6 N$ @3 h9 K7 ~6 E, m! o if energy > 50 [0 @: w( L# ?& o e
set energy energy - 50
+ \9 }. _: A+ q; q1 f& ? hatch 1 [ set energy 50 ]
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end: I7 _6 B) n# G- [
to check-death
" P L7 g& s8 v! @/ i7 Z ask turtles [
$ \' C6 x+ B! a8 E" G' K' J5 ]8 ` if energy <= 0 [ die ]
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end
; w9 g& a2 G" R1 L4 d3 ito regrow-grass
7 D3 ]+ j6 G; F9 i4 V2 a6 r ask patches [ n2 B$ [, d+ n! T" ]( Q8 x# Z
if random 100 < 3 [ set pcolor green ]4 A5 b, P0 P! T' L: @4 o- D7 o
]
# ?) X2 R. t' ^end
* t% R. J# V; ]2 T2 Z4 yto do-plots
" o- x+ c1 w, D3 j7 z7 |- { set-current-plot "Totals"
8 ~; W2 E2 c" g7 X- q8 ?3 A set-current-plot-pen "turtles"! |3 ?6 F6 q# Q9 t
plot count turtles
+ F% H9 t5 f: j. w4 H8 y set-current-plot-pen "grass"
7 v4 z. w6 u4 D: Y+ I- n plot count patches with [pcolor = green]7 i; d5 c# w c' U) p% y
end
# D! N6 }* n0 o+ L' l: H" T可是运行时提示no such plot: "Totals"
( j# J t, p8 X( L1 y+ B' u4 herror while observer running SET-CURRENT-PLOT, n6 }1 c( z+ `4 J4 c+ ^
called by procedure DO-PLOTS" N9 P6 I. h. V6 r' g
called by procedure SETUP; N a% a1 q6 _* l+ |
called by 按钮 'setup'
7 U1 v6 ~# U) |+ B. ]求大神解答啊 |