我编的程序如下turtles-own [energy]
6 A* m0 I* l- T" l, fto setup
7 D7 \$ ?9 J( h0 U% t2 g; r" q clear-all* l' P& m: O" X6 ^( s
setup-patches* u8 w2 s2 v; `* Q) z* v) R
create-turtles 100' s/ U, W( J" `6 }
do-plots1 B" R4 r2 S) b+ ?. x
ask turtles [ setxy random-xcor random-ycor ]7 D9 \$ k% Y; W6 [* b
end
; R! `2 N |# q9 a. bto go
) K0 f8 `9 p" f% \: N* w/ x move-turtles4 h5 \7 l' ?, w3 Y& X
eat-grass3 p! {2 w. z0 }# @: j
reproduce
% [; ^/ G# D S/ w5 l F2 Y2 s check-death
% w/ L9 u9 X, \4 } regrow-grass
% S% n$ s- G( F, [ f; } do-plots* y# g9 Z3 J1 ]( o4 o8 v) r0 k! n
end
2 l5 ~+ b' y/ b- Fto move-turtles
) _- ]. `9 b! C3 O' j ask turtles [4 [7 l& c5 I, r; t
right random 360; a7 R8 V) \9 A$ d
forward 15 _+ ?, D! | j2 I
set energy energy - 1
/ ?8 l: W" G3 H" ]+ ?, z2 s ], [0 n1 _" h1 s4 |4 O0 n
end9 p4 G E# W+ Z$ y* \- H2 Q
to setup-patches
9 }. W; _' l; E- {% |0 r) r ask patches [ set pcolor green ]
9 n' P+ Q+ ^: T9 b' Wend( b* q0 k* x1 T0 a5 e
to setup-turtles
3 l z2 s% _# s create-turtles 100
9 R' G5 W$ b% R; @& |* C, l ask turtles [ setxy random-xcor random-ycor ]6 j, v( t- l9 t" I" [
end" c6 C3 P$ {* l, E9 I6 }. }
to eat-grass
$ y& U8 V0 T& ~8 c9 {# K1 Y ask turtles [/ V7 U- Y* U1 K& K9 V
if pcolor = green [- ?7 ^# o o0 J p9 o
set pcolor black$ N4 \* P5 p) t7 |7 \( X5 A. }
set energy (energy + 10), w+ E3 w# A; B }
]
8 q; A9 J' b8 y' P8 e ifelse show-energy?7 p! ~- @; V; b4 K8 c# S$ F
[ set label energy ]
; u j1 n( w6 o: |; E# M [ set label "" ]; `5 F) T6 x. j
]5 a1 ?1 y. ]+ e7 ] N
end
# T* c. [; ?9 g! m" J5 \to reproduce
0 v9 B, j2 b$ i- s ask turtles [
; q0 F* F* a# D: s if energy > 50 [& ~2 C6 W! A+ M7 X/ q: l) _
set energy energy - 50& r) ^. ^3 I$ t/ {; N T! \# {
hatch 1 [ set energy 50 ]
- G9 Y$ n6 `# u+ o4 U5 U ]6 P# O5 @; R# {7 B8 p% y
]" `+ P7 i. E$ j3 ~) t
end0 _. [1 W% M( J% P7 c/ m
to check-death6 q. q6 y. o9 `& |
ask turtles [
% u( |, K# o! X6 s; e; \) J if energy <= 0 [ die ]% [2 _$ h. _6 r+ O, G0 X
]
, {- H, ?" B, A8 n/ V1 xend
" k4 |2 _7 V4 Sto regrow-grass
! u0 y! Y a* j0 j/ d ask patches [. L# Y" z. t- l5 `& k
if random 100 < 3 [ set pcolor green ]
# R0 t4 h5 c* _8 u3 X6 E% B" d ]
& r3 l! a9 `) q+ d- Wend
* Z I4 w9 Q7 [" qto do-plots
1 m& j# U j+ R6 k set-current-plot "Totals", D/ L; m7 x/ g* t8 x. s
set-current-plot-pen "turtles"7 n5 f8 o L v& M- k6 m
plot count turtles
1 q; A5 P/ q9 T- r) E8 W5 b2 t6 | set-current-plot-pen "grass"2 a: ^, Q G- r) n
plot count patches with [pcolor = green]. L0 P* V5 J2 K$ d# z) y0 |
end
6 x3 a( [9 ~, _5 O4 i r7 H( l可是运行时提示no such plot: "Totals"
& s* H. B9 |1 S& Z5 M) Oerror while observer running SET-CURRENT-PLOT5 S* b1 M' Z2 N
called by procedure DO-PLOTS
7 S8 c1 H0 ~9 I& f5 U* @5 s5 k+ d called by procedure SETUP
% G1 P# Z$ g$ n( N; b+ w- U called by 按钮 'setup'7 X& i7 ?* N4 ]$ B+ y( p
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
