我编的程序如下turtles-own [energy]
6 B; w. W: s3 D. ]! dto setup/ L7 g1 T2 t: _6 k) t
clear-all# I% B7 [. w% n! e1 M) ~' I
setup-patches
{: S; |5 W- i& J* C create-turtles 100. _6 L: I5 d5 @* N6 l- g) [/ p
do-plots
; {% |/ D' H/ O- E6 w, X$ |$ k6 h1 Q ask turtles [ setxy random-xcor random-ycor ]
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to go
/ ?. e6 l- H" U* S# f( m move-turtles8 ^1 Q0 t' M* h" a; E
eat-grass
2 Z$ p4 S0 t8 v6 y6 ^' m+ `6 ? reproduce
: k7 L5 U* R2 f- F! F5 T6 C check-death/ h/ d# \% O9 U& S6 L
regrow-grass: u; ~5 K" i0 W4 T! i
do-plots- T" Z- o" H/ M5 I. m9 ]- Z
end
|* a( X1 u& e V# zto move-turtles
( V, L8 k" `5 d# c, _3 D; X& u ask turtles [) m( _; f1 n: m5 _8 d m6 j$ a
right random 360
. ]3 \$ ^5 Z) x: F; p2 m. @ forward 1
& U) C1 `5 l/ E% U, i set energy energy - 1
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R7 a6 W8 ?- r9 I( s( fend
( w% @! G5 m7 Vto setup-patches' k1 {4 M; T) N0 m- v4 o' s8 ?
ask patches [ set pcolor green ], j9 Y" K) E; y
end
+ W, Q" {( g- bto setup-turtles
) p, M" l: G4 l7 ?5 r3 [ create-turtles 100
# q% ?4 A n" @+ O; d+ w ask turtles [ setxy random-xcor random-ycor ] C( s8 O! \2 P. U3 J% k
end
( m! N* C) _5 l" V( fto eat-grass7 v8 c2 l( F8 ]2 V5 r
ask turtles [; @$ a/ \5 F; ]. u. m+ M Z
if pcolor = green [
8 ^3 q1 F$ _5 H' L+ W set pcolor black1 m9 O; a, }' F: N$ @. l
set energy (energy + 10)
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# Q$ Y. A$ C S5 [2 h ifelse show-energy?+ g$ d0 y0 J& d4 z8 G7 u \
[ set label energy ]
; p6 R. P5 |4 q [ set label "" ]
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8 ]* w/ d2 V1 g c) G2 {7 Q$ zend
/ T7 S: a7 L* h) Q! g' }: I/ yto reproduce
$ T6 v; Y; q8 v0 T& r8 T ask turtles [
; d) h1 l1 M3 z if energy > 50 [$ e8 d% v6 u) k2 R8 v: `' o& {2 L
set energy energy - 50: u, s& T( U9 `7 W$ }
hatch 1 [ set energy 50 ]: R0 P6 A; B' b2 @
]# S# G# N e& K1 J' j
]
9 [, K, a6 g* i4 m; n. Z! ?# `/ Uend
% f) d! \, H0 d, `to check-death
- P; R3 |* X' z# V. \' @ ask turtles [& H* }/ N* w3 V% H' y( L- v! m
if energy <= 0 [ die ]
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to regrow-grass
6 _: J7 L7 ]$ l1 n( U" | ask patches [
+ D6 e( R% X5 g2 s6 x y if random 100 < 3 [ set pcolor green ]" x# H) b7 j4 E) |* ~, j* B& k, i
]: s: W) P' \- w( b
end9 O. n3 ~1 r% p* o/ ]" [) ?7 ]& m
to do-plots4 I4 K) ]7 o& }
set-current-plot "Totals"5 J; E% h* t5 M1 }( C* G) x& D m$ m
set-current-plot-pen "turtles"0 I8 l$ r q" U- |. v
plot count turtles. n7 n" X F" m8 w, ~5 g
set-current-plot-pen "grass" i: p h8 W1 ]- k
plot count patches with [pcolor = green]
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可是运行时提示no such plot: "Totals"2 ^) u) ^/ w/ ?) q6 A1 j2 y0 ~
error while observer running SET-CURRENT-PLOT: z3 F) _+ E1 I( W) o7 C
called by procedure DO-PLOTS
+ @1 U5 W# q3 {' {! J/ s7 d$ V called by procedure SETUP2 `# E( Z6 ^* O- Y! g
called by 按钮 'setup'
, g* D! j, ~* t* z* j9 M求大神解答啊 |