我编的程序如下turtles-own [energy]
: `( F% b" o# R' C2 Sto setup
* Y" v. X" E1 x* k0 U$ a clear-all
* }0 V/ W6 F' S" Q& S setup-patches& Y" R, }. a0 w' ]; h2 N
create-turtles 100
8 l: H+ C: z" d do-plots: e0 M; l, z. {( x
ask turtles [ setxy random-xcor random-ycor ]2 d0 \6 W: O, y4 q1 {4 O! n
end
t- Z6 l- o* n/ _4 ~* s% M% |7 y4 ~to go- L' P7 T- K5 P, ~
move-turtles+ Y4 A# g" n3 E* \4 O+ h1 F+ Y" g
eat-grass
( x" s @/ L0 | reproduce
" J0 {6 F$ e$ `* `4 ?* B" k8 c check-death' N# s1 d6 H- p f/ r% _9 V
regrow-grass. q/ i0 I! Q8 ~+ U+ K; I
do-plots7 i3 z0 K! z ~$ u7 V+ z7 r: U
end& d" A& Q& z5 P u$ ?
to move-turtles& Y* m8 _9 l$ |
ask turtles [
! z! c: }/ }6 [- ~# @( L7 | d right random 360& w6 n* f2 f& \4 |: t
forward 1
4 `# w) e8 ?) e( C set energy energy - 1! y7 Z& l9 ?' [! X/ S$ V- D8 T8 V0 C
]
9 }& c5 R$ N; Gend, E" T! i3 f- z0 N: T& q/ n! K1 a" v
to setup-patches
0 z, A4 m' _! B: q ask patches [ set pcolor green ]
8 X& Q+ q4 N" {9 j9 ]5 o! `end0 _8 G2 Y- D9 o* ~: `8 Q& M
to setup-turtles
0 J2 |6 z9 A8 j create-turtles 100' c7 }) H2 {* D& t; w: Q2 Z, {
ask turtles [ setxy random-xcor random-ycor ]# W: D; u) n( E+ ^
end
6 u+ G1 C: q2 v3 w% qto eat-grass
6 m* q: ]& b' p. n4 }0 m ask turtles [9 [3 B) Y" P9 B0 U+ ~9 C
if pcolor = green [
6 h% v: y" f! H; F set pcolor black3 {( h, _' v9 G& z! O
set energy (energy + 10)
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ifelse show-energy?
K0 z: T9 v3 k1 x: _ [ set label energy ]3 M0 M% ` C$ B8 v/ }% X2 I
[ set label "" ], U+ Q" F6 X5 m
]
4 ~. Y5 H5 O7 m5 \end
; l6 I/ u/ [/ J% E+ u2 s6 v. Cto reproduce
0 l2 B( N3 ?$ H0 ~" `" P ask turtles [1 E4 F- d2 r. L/ i1 A1 c
if energy > 50 [( T2 }( j n. Q' n; W' E: _5 F. j
set energy energy - 50" m$ l8 P2 l& q9 C- L
hatch 1 [ set energy 50 ] A# ^( b, b) B
]
5 e+ f5 A; i" f( z- y# ^( [1 m( L# i ]/ @5 n3 p- l; B
end4 b f' q a/ P) Z' ^$ C" u
to check-death9 ?" L* x* B3 C% I' Q
ask turtles [
" J. {; o" Z C; U; F* g if energy <= 0 [ die ]
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end
2 j9 [% g( a+ R( |( q/ zto regrow-grass
& G! @ I+ q& N5 I6 q" O ask patches [
4 ^6 a) Z$ F6 D S# F3 ^4 \0 P6 K! ] if random 100 < 3 [ set pcolor green ]. h7 S6 X6 S$ d
]
7 @/ I& O. p9 E0 S9 R( ?5 nend
6 G" n( Z a2 I7 Z$ a/ o" Sto do-plots
3 ]& R: v) }! P) g% { K set-current-plot "Totals"4 d" L7 k- }& }
set-current-plot-pen "turtles"
! B7 c9 T4 n/ `8 T, y! m) O plot count turtles
8 b7 n0 Z- x6 I) i set-current-plot-pen "grass"
! U4 T' c U( t1 M. r4 A plot count patches with [pcolor = green]
# i% @, u) i$ }end
: H' m5 z+ _$ N9 h0 a可是运行时提示no such plot: "Totals", G x; v W- o9 ^( h$ |# n2 V
error while observer running SET-CURRENT-PLOT
. Q: R4 E6 y! E4 s called by procedure DO-PLOTS0 z- C# C0 }' v& {. n3 ~; d
called by procedure SETUP8 i. O* \, o, u _! n% J
called by 按钮 'setup'
+ ~6 `, S. e( Q l# T3 V+ x8 X9 v求大神解答啊 |