我编的程序如下turtles-own [energy]
, }# F5 q: a- x2 y4 ~3 Rto setup4 z m- A3 O: A& b: X- y. |* O3 s4 c2 R* u
clear-all
: c- j0 v/ @4 J! o# J8 L6 `3 m setup-patches3 i) c: X. R! V4 _. G( _
create-turtles 100
& U8 [9 {" m; r5 Y9 [ do-plots5 \( e7 B0 r7 M% }' n
ask turtles [ setxy random-xcor random-ycor ]
" r* {) E" b1 O! n, @end
4 L/ L4 i- Z5 W* ` K1 R8 ]to go& y, t" b& g9 [5 h8 {1 @6 v
move-turtles! |$ O7 Z8 p& S: W+ X3 S2 W7 ?: S" g
eat-grass& O8 `% q# E# e1 j: ?
reproduce6 N( }, K& j/ \6 b, z w
check-death
i: G& X) F2 J6 } regrow-grass
" C& `# |2 ?- a! k do-plots
: P2 }7 b1 u; n: S3 B6 `end$ [) G4 n8 E8 j3 ^
to move-turtles$ x: w- p/ H. A7 ~6 o; N/ a8 T9 O0 d
ask turtles [: u# W% `7 Y2 v8 ^2 t- o. G
right random 360
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set energy energy - 1! k. V2 G D, l: a) C
]
5 a5 C! ~1 _6 T; Tend6 \; {" h% s- H
to setup-patches
( }2 b& z8 b W T9 H0 y ask patches [ set pcolor green ]
3 d% `6 q* a# c2 mend: Q9 n0 V; h+ Y5 @8 j( r
to setup-turtles* I/ c0 ?, O4 M7 D% t( r& q$ ^
create-turtles 100& x3 v1 W K$ V" P: V' |# l! l
ask turtles [ setxy random-xcor random-ycor ]6 D$ N9 e: W6 z( _: s8 y6 o
end
6 s& A, ]9 K% K# a4 ~" Eto eat-grass
1 H5 {2 f7 G2 K; x$ l4 o( R ask turtles [
' \4 ^9 ?) R. g5 R$ f# C; H( S if pcolor = green [
7 M, @+ R v( i# A set pcolor black+ R. V& u# A- P0 W3 P
set energy (energy + 10)! ]2 G: F( A: e% b/ G
]
9 A3 W# r+ q) F- s/ E7 e: Q- H ifelse show-energy? G& T! q, e, N( z
[ set label energy ]2 Z; |6 k: C+ j+ G: H
[ set label "" ]/ x! I8 P+ w1 v0 ?3 @* k& X
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end
+ W W3 {% L" d% f2 V: y5 x0 sto reproduce$ J8 e; w5 ?9 o* \# u" f
ask turtles [
1 Y" o$ @ J0 P* W u8 X if energy > 50 [2 d. k$ }& H' i3 s* I Y% g, E4 |
set energy energy - 500 H0 h5 f, Q& M1 Y& p
hatch 1 [ set energy 50 ]+ z( F7 n) ?; c& j- i8 i
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end
9 U, M6 _; @$ r7 p4 j/ Rto check-death
: X3 i9 x8 a' g- g. X ask turtles [
4 W6 C+ U0 M h. a) ]; \ if energy <= 0 [ die ]7 h# M) x. m x& S! S/ W
]9 I2 h+ O/ n& q U; j- ^/ s* r
end$ K* d7 ?3 ]9 ^) n) }
to regrow-grass, {2 e! O, G( V D6 C; j4 d
ask patches [# q. h3 ~* z9 W# N$ f
if random 100 < 3 [ set pcolor green ]4 _2 U4 B8 v9 M# w. R4 q
]
9 m7 _, G$ T9 ]( C5 kend
" s. }3 D8 U, Bto do-plots
# ~% Y7 `# d$ T2 O set-current-plot "Totals"
# t" F( G7 O6 Z) U set-current-plot-pen "turtles"( I! G/ K2 g$ a8 @
plot count turtles
8 R4 Q6 Y' p5 Y0 ^4 W6 L; W) b set-current-plot-pen "grass"8 T3 E2 t3 q+ K2 K* |
plot count patches with [pcolor = green]
|+ ^3 P9 b* q0 E; W3 \end
7 E' ~1 ?/ u6 k" ^4 z: \- s可是运行时提示no such plot: "Totals"
5 t/ ~5 u7 b/ H2 S7 S3 _error while observer running SET-CURRENT-PLOT0 `6 ` Q0 F) @5 f0 `, M/ a9 W4 j( X4 P
called by procedure DO-PLOTS$ ~2 _+ \$ K! ?/ Q% A; x* p- V6 q O
called by procedure SETUP
- T3 F' v$ e9 H0 I called by 按钮 'setup'& N3 U: r- |8 }$ K1 r
求大神解答啊 |