我编的程序如下turtles-own [energy]
) s- M H- w* e" ~ ~/ F3 f) sto setup4 s% {. W! M4 x
clear-all
- z% {1 q- E5 u3 U4 k% f setup-patches
+ h m5 K6 F. T3 l9 Z3 b create-turtles 100; S! w. B6 X0 n7 A" }
do-plots
" P8 h2 \3 ]6 w# i, ? ask turtles [ setxy random-xcor random-ycor ], J# J( O4 [+ u8 C8 ]. W4 B3 \3 u
end
! W" P- w; w( M0 Dto go
% ?# h" U$ J; O( h1 K) B- B E. U move-turtles3 u- t$ w0 N3 _+ x& N G2 j6 L$ {
eat-grass! V9 K4 p8 v3 s" d) k
reproduce
' b% U1 @" ?$ t) P check-death
# O3 ]0 I1 m5 C9 b regrow-grass
c/ V. d2 Y/ U$ Z& S do-plots
$ T" }' M8 j6 \: n" ]- i$ r, \end
" @) n# Z1 z( ~5 j/ jto move-turtles
# m. x- c+ H j ask turtles [% L) \0 ?( h3 X: U* b* h
right random 360
! W) D" u7 A9 t6 [+ S! I- a6 l# Y8 a forward 1
: |; ^& ^6 t6 s2 j$ _ set energy energy - 1
- G( R4 J1 u- E/ t* E0 P4 p ]; H; a8 f, \) [& U& C
end/ l) h; V; w; C+ @9 P4 b
to setup-patches6 m6 e: Q3 ~% j7 R, |3 H
ask patches [ set pcolor green ], B* K' I. J/ H8 H* [9 a* o6 _
end
4 \# d, u( w5 {( K; d! hto setup-turtles7 a/ a) S' x4 g
create-turtles 100
8 O: \7 v, N# m/ c3 M ask turtles [ setxy random-xcor random-ycor ]
8 j4 I7 a- K/ I L) K$ k- S6 _end
5 N7 o1 V) W- M, M; I1 Dto eat-grass6 h1 K0 E$ E6 B4 ~+ G5 U, B$ N
ask turtles [8 s7 R1 B) g7 P' i* r) e7 J
if pcolor = green [
+ I# h* F% K8 f* r/ C5 p2 C& r2 k set pcolor black$ Z4 {1 e B: H2 {0 d1 Y
set energy (energy + 10)' B* T) [6 E6 R |% E
]: s8 X; I3 i* E
ifelse show-energy?+ G8 Z1 X0 S% y( L+ [
[ set label energy ]
; B! r( I" t9 N- i( _) F [ set label "" ]; R4 |% Z$ F+ d/ n
]; V7 X5 i/ V- @# H7 Z7 p+ B* J) `
end7 x) F* K( t7 L2 p0 s o
to reproduce8 {% g0 s7 M* |
ask turtles [
# T6 [$ \: A. I7 c* Q if energy > 50 [- U0 i& ?& w% g) h% ^
set energy energy - 50; k& j, @, b: G1 e1 ]! G
hatch 1 [ set energy 50 ]
5 q7 D4 v, ?3 G3 c: A ]
% c7 v2 }! e1 Y4 q {7 n4 Q. a ] j" M6 H; y+ q: H1 P: O$ ^
end) }% O" Y6 y; d
to check-death
: _; B9 w' f' B6 D M ask turtles [% B- c1 \/ ?8 P9 b
if energy <= 0 [ die ]; B8 E7 m5 B" R( B7 @; g7 R
]% `( p2 c U) w% }# z' y0 L
end
' h" ]' Q; j; U( i) N& ~# Gto regrow-grass
) e- }) r1 _' g+ b( _ ask patches [2 f9 [6 @ O, N" \
if random 100 < 3 [ set pcolor green ]% x* ^ N; S3 P/ T* `% P
]
5 m( q3 b4 Q/ N- v! k) Z9 Send6 J) P+ H8 y5 M( J6 J
to do-plots
& X; f3 @* o4 [5 [+ p0 u" C; O set-current-plot "Totals"
M! y9 Z, T. @) {) S4 O set-current-plot-pen "turtles"
( }& r* i6 a) M, k2 X1 ]# m8 h* n plot count turtles) }: ?* p& b: S. h, o" u& p/ U
set-current-plot-pen "grass"( X B4 Z- S0 l/ `& p+ A) h/ @
plot count patches with [pcolor = green]# D3 z7 D0 k: {0 w; A
end
+ @2 S& x/ O' n" k可是运行时提示no such plot: "Totals"4 z4 D2 z& S/ @5 h: h, _
error while observer running SET-CURRENT-PLOT
% d. {; B9 V: y! x: F* d# Y# w, r called by procedure DO-PLOTS+ p8 x* j0 q7 z2 j* A& N% a
called by procedure SETUP3 {/ t3 y- S1 b5 ^/ _3 S" Q" U
called by 按钮 'setup'
7 f& Y- S7 F" y; K5 U6 J( w求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
