我编的程序如下turtles-own [energy]/ C; y' [% r1 _0 k/ _* ^/ z
to setup4 _6 C5 @, V: |4 t
clear-all9 y8 J( p1 F6 [- k! |9 w: A
setup-patches3 Y2 E/ h5 z/ A4 _7 A7 l! D- r
create-turtles 100 u: R6 l% z0 g7 I( O( ], }
do-plots
8 R; X3 S% g$ I7 ]0 B. G ask turtles [ setxy random-xcor random-ycor ]6 c( [$ Z; f; e
end y# X, j* r$ T& }4 m
to go
$ A7 b( k2 `$ r9 u4 y/ x) [. P move-turtles
6 e' s2 ?0 U. |7 g) v/ d eat-grass( @, i$ U# O4 T( D* m$ [* G
reproduce
0 k: _- g/ l9 R- Y check-death
. t! \) i' u% A5 l5 D; c! ` regrow-grass
+ }7 J; i' ]5 k h5 S do-plots
. N9 ?5 `) A* l1 Xend
+ Q1 l0 E2 d- e$ G4 {9 k, Jto move-turtles
" U2 e. \: e+ Q3 s* ?% ` ask turtles [
$ v/ G$ f N# i! w right random 360
+ J3 a6 G8 R6 _$ I4 z forward 1
! m5 B b" T3 P8 M0 q; u7 U3 O1 o set energy energy - 1* I% U. i* Z J# a) N9 x" x5 M
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end
) a! f( ^2 y6 i" c" Y* cto setup-patches
( S P# t( O2 j ask patches [ set pcolor green ]5 a7 {" m, t3 F8 ?8 `
end
" r; Y6 g% l# Y1 {' B( O) v2 ^to setup-turtles0 i/ a# J, k) p7 q, u( K
create-turtles 100
' y4 h' z- `% M/ ]. j" x5 q2 X; g ask turtles [ setxy random-xcor random-ycor ]
6 Y0 e( Q6 k5 @8 V, `end. z& T& w( A2 @! _
to eat-grass
* f# L4 W- {7 |' }$ G* d" @9 v9 | ask turtles [; n3 d- {/ n: |' M
if pcolor = green [1 Z1 J# y+ N* n9 c; V m
set pcolor black) B) @ v' D- ^% G9 }$ t
set energy (energy + 10)% N+ K1 F$ C9 J3 f5 B; r! {
]1 E% i# F- k; q6 h2 p
ifelse show-energy?& D8 P7 Z5 t2 a( z% i9 k4 F3 M
[ set label energy ]
7 r! v3 V9 @- d4 L9 |( S) @ [ set label "" ]* @* o/ E" [# | e' J9 N- i( E9 q
]5 \% E3 R( T9 g# K2 s t
end
- V, ? b' I( p% Bto reproduce
/ }, i* t: J, `/ L% c/ o, X ask turtles [6 S6 e; \; f0 J: p ^; F. O: m5 U
if energy > 50 [. J) K+ E" M. Z
set energy energy - 50
4 D6 @4 ^& c+ x3 J9 g6 T3 R hatch 1 [ set energy 50 ]
6 S7 y* M# D" E7 o% `# ^+ ? ]& n8 k7 A1 W6 ?# p( G8 k6 G/ c
]* J, r4 D! i* l0 |# i
end- n0 r) g* G7 q7 [
to check-death* q" i$ _0 |; t0 `3 |; O$ |1 X
ask turtles [
7 ~- o, p. W8 _( h if energy <= 0 [ die ]
$ ~/ l0 o2 n$ n5 O5 @3 v+ g ]# Y- z. Q6 @4 E& T" E6 r3 m
end
+ W4 i3 K8 [: A5 S+ oto regrow-grass& J7 ]% Q( i; [2 B) G$ @
ask patches [
% U4 z8 C7 W' b if random 100 < 3 [ set pcolor green ]7 z; w4 g% B8 X& i
]
, Z. B! u6 L5 dend* K; w/ t1 U+ Q' m( Y* L, E
to do-plots
# z/ \/ |/ S7 d set-current-plot "Totals") U1 E O6 ~& {9 L% b$ o
set-current-plot-pen "turtles"
3 Y) ]& j9 {0 n9 D7 u" m" E$ E0 I plot count turtles7 x, e, ^2 }6 H, e* W x& ]2 z
set-current-plot-pen "grass", k" R) I1 q& c: {/ T, }8 g$ P
plot count patches with [pcolor = green]$ f& [7 P; R h, y2 I0 y( g, h# |3 h
end8 M y' c% Z: H/ z
可是运行时提示no such plot: "Totals"
" d8 y Z: P9 lerror while observer running SET-CURRENT-PLOT
8 n5 b) x( W6 a0 _" n* Z( Q. @) H called by procedure DO-PLOTS
) z* y0 ^+ I: m5 | G* _ called by procedure SETUP( \# L: X2 O; a
called by 按钮 'setup'
0 T; N7 q# I# e; U2 y2 O3 @求大神解答啊 |