我编的程序如下turtles-own [energy]
6 Z t' a$ d, A+ r/ V; Ito setup
" f: Y" _ h z5 X7 i7 `- L clear-all
& a3 [: v- m- e9 H. h setup-patches
. [6 n$ L' u# Y7 [( u7 t create-turtles 100# d4 m) ]( }. m0 \, z+ I
do-plots
2 v6 D$ t( B' P" W! a ask turtles [ setxy random-xcor random-ycor ]" R8 a) u9 V* Q) M( ?1 P
end
$ V N6 Q3 f% Q0 z$ N6 `to go
2 ~- g) X$ M. ^+ E7 C5 t! _ move-turtles' n$ O, F8 B% n
eat-grass
) z! c g3 u. d% s. N* k reproduce- R: Q8 h( T! j
check-death
}3 l) q V8 A2 ` regrow-grass% G! B3 `8 R( H$ T
do-plots5 |4 i6 r# E) B. z W$ p' o
end
0 G7 s' I; x0 d, U6 s, d1 s9 Zto move-turtles
. g: U# B( I# u7 l0 Q0 L' \ ask turtles [! B( S! ^. c/ i
right random 360+ ?5 A: F0 K7 U. v# A
forward 1
; w0 q0 B1 G2 K% Q* e set energy energy - 1# ^# ]2 O0 I- u; {/ M
]
8 X1 }5 _+ D# F* j8 Mend1 ~, `" B5 X4 s0 v; A
to setup-patches4 N# {: {9 C; b) j
ask patches [ set pcolor green ]
9 y6 F0 X1 {: @, C- xend
( k8 r1 q& ?, \; ^to setup-turtles- |; K7 d9 i5 n0 n! \
create-turtles 100
! c4 { X P0 p; l$ K* T$ c$ ~; a ask turtles [ setxy random-xcor random-ycor ]/ R N Q* w/ k
end: O# f; N2 Q9 i: L9 N: }" ?
to eat-grass
7 ^4 l$ ^, q0 W ask turtles [
8 V/ u) n9 F( C& k. g if pcolor = green [$ e; n& Y& \' f
set pcolor black. B9 C4 D1 J) w/ d. U* F2 k' L
set energy (energy + 10)9 M: ?* S8 a6 n, [
]# S, o8 @/ }& i4 x9 e
ifelse show-energy?
7 W: C7 S/ h, y, J9 T [ set label energy ]+ L" n% x: N5 s1 F0 D A" B. F
[ set label "" ]* J$ Y; r/ y) @0 T! L2 r4 s
]2 y6 z8 @8 O @3 n0 J
end3 X; @8 N. U+ ]% o, _& c/ }8 f
to reproduce" y+ V0 }* B% N3 R! P( A
ask turtles [
: I: V: r) I% @- H8 v if energy > 50 [
' U( U0 n) a- Q set energy energy - 50! X1 R; d7 i" D
hatch 1 [ set energy 50 ]
; F1 N4 S! l3 G1 {6 z ]
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end
2 l# k4 B! v9 y1 n6 ^to check-death% I+ ^% A' M" |: ]" S, v
ask turtles [& ~: E/ i$ h0 |% i* T. M l- k0 I `
if energy <= 0 [ die ]) y' L3 D$ U9 [7 ^0 \
]) r1 T* [2 y* ^1 T) C
end$ `4 q; v$ @, Z5 N! @
to regrow-grass. [" h3 O5 V- W: I: z
ask patches [" m5 `- W) g& `4 l& c
if random 100 < 3 [ set pcolor green ]
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end+ v* ?' B m4 G) b" O% O" R5 l
to do-plots
7 H$ r! ?) @+ e+ {1 ` set-current-plot "Totals"5 f3 K1 f0 o/ e$ g$ W- ?
set-current-plot-pen "turtles"
% o' U; {2 H2 x5 \8 y) I plot count turtles
0 ?* w. G) M6 l. U: [, k9 W set-current-plot-pen "grass"
+ \3 m' s6 W- y( m* X plot count patches with [pcolor = green]
* A5 {/ \8 q4 p! H4 d6 P$ T" Jend
) Q1 R+ y1 J6 \; K4 k可是运行时提示no such plot: "Totals"+ r5 o, y# B3 @4 T9 Q3 H" T3 d- V
error while observer running SET-CURRENT-PLOT
: e; ]4 I% S7 F) c8 s9 u called by procedure DO-PLOTS- C2 N) m6 I0 C) B1 U
called by procedure SETUP- |* h9 [; ]$ P) r: \( }# f: u$ P
called by 按钮 'setup'
5 t1 k& p8 h9 x- H# G& m# P5 A求大神解答啊 |