我编的程序如下turtles-own [energy]7 J# \; H Q- I/ {: k! K
to setup
( d/ Z( j' @! h clear-all+ M2 V8 E* n6 |# p1 z
setup-patches
* S) J/ |6 P) `0 Z3 m create-turtles 100
! z* j; v' ]' d- T; [ do-plots6 o6 S5 B! s& u" R$ A2 X
ask turtles [ setxy random-xcor random-ycor ]6 }" l) H0 f! M1 k# I& U g
end
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move-turtles
8 R6 ?' H# a# D" T# w+ g% w L: g! Q eat-grass
3 |$ {) u* U- d% r& }, c0 L reproduce
6 }- Z2 C; V9 J6 H1 f4 t2 O+ { check-death
2 m8 l M/ y1 T! [& m regrow-grass3 c) u1 B2 K5 h8 i
do-plots( ~ B7 M2 K' u! Q4 _3 a8 c
end
# T2 ?& J' ], X# C) R) N; Rto move-turtles
+ v2 |1 P+ V6 ]) R* Y ask turtles [- S% z) W7 i8 n4 z) s- i4 ~7 R
right random 360$ @2 q* a, z+ B. j
forward 1( I! b3 w7 U* I7 {% {( k& Q
set energy energy - 1
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end4 R5 O0 C4 A9 Z5 l
to setup-patches+ {6 l8 _' c) I
ask patches [ set pcolor green ]: h4 `9 g! F, y
end( s! H+ T2 ^# D6 o7 V' j$ o8 b9 S
to setup-turtles
; Q+ b. Z, j5 k: C$ b create-turtles 100
( G) ~* R8 m2 g ask turtles [ setxy random-xcor random-ycor ]" |0 l/ \, b b2 f9 r! t& Q
end6 ^( t/ D3 @( v% r
to eat-grass
3 g. Y. Q [9 M# I ask turtles [
' [9 L- v9 ?2 {" D' _, M9 b if pcolor = green [
- I: w: h, P0 u/ u7 ? set pcolor black0 ^' P: ^5 E- \6 y
set energy (energy + 10)
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ifelse show-energy?' Q4 q. R- ?+ ]; E2 P I1 y' g6 w
[ set label energy ]) |: N% M! X/ D) c/ o* h5 ~ |5 \ q
[ set label "" ]
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end6 ?+ M9 D/ {: g8 F, e1 ~
to reproduce
/ y0 p, O& |" W. O ask turtles [+ W3 W' C' R& T" R! _
if energy > 50 [! W$ A+ d0 S' _- w2 @. X
set energy energy - 50
* t* E4 z' I) m- o+ G+ R6 U0 H6 c4 H& ] hatch 1 [ set energy 50 ]2 `4 J( }1 y* K0 d" f& Z O
]
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end
0 n/ {1 d/ f Y5 Bto check-death$ E9 v' s& U1 W) |
ask turtles [# q1 _$ I3 v1 ]: f
if energy <= 0 [ die ]% \7 ^9 X" f6 a; n8 i' P2 Y- e0 `4 U
]& c' B3 l" `9 @
end
3 t" r5 u5 H- S) d Qto regrow-grass! }: k" u8 z' b. F r
ask patches [
, a: S2 r h+ A1 J if random 100 < 3 [ set pcolor green ]5 G* W; u5 `" O& M) [" A6 ~; s
]
( l+ x& c1 ^ Q# B( o5 |end( m6 k7 F9 o+ w3 K( r
to do-plots8 n. v+ g/ o" A; O+ z+ r/ G
set-current-plot "Totals"' M$ U! u0 T+ B) ?6 K
set-current-plot-pen "turtles"
# |1 D+ d7 \- s$ c plot count turtles- ]: s9 N% q' D {2 }6 p
set-current-plot-pen "grass"+ `0 X& a& g% w6 Z+ t4 Z, W
plot count patches with [pcolor = green]
; c1 u$ l2 W+ |% Fend
- f" B8 w! k2 f3 O7 s& J可是运行时提示no such plot: "Totals"
% d. i4 j% O# }4 v) t" T# ?" ferror while observer running SET-CURRENT-PLOT
4 P. A7 O5 e' M1 B9 g y1 s called by procedure DO-PLOTS2 S3 p# M* e. z7 Q; ~6 c7 n6 p; E
called by procedure SETUP
$ O1 |8 v: o; P# U" q8 E( m called by 按钮 'setup'
8 Q6 \. l6 ?9 b& U8 M7 @% s求大神解答啊 |