我编的程序如下turtles-own [energy]8 z- T- l* V% r S, D9 }
to setup
# o' G5 `6 f3 T0 V7 } clear-all* r+ F A0 k$ g
setup-patches
" W6 e; u. o2 K# b2 A create-turtles 1007 v0 W( C& M, b! M) O. J2 L3 n
do-plots
8 B% a- X. ]2 V ask turtles [ setxy random-xcor random-ycor ]
, `% B+ V& r, e& a8 Tend
/ n; `& N: i. R+ }. h. dto go
1 i9 u2 H' |* q- Q( i& _; k move-turtles& x- ^+ \1 c7 @+ G9 [+ ]' W
eat-grass
3 G4 z# x# R& z1 w# _ reproduce- |- m9 z/ K: u0 O" F' U2 s; |
check-death
+ y" R9 b( R6 ]8 @" O regrow-grass- K5 J. Q/ k1 u6 W/ d3 n# W
do-plots' C+ q: O9 q$ y
end* U. g* Z" b* }+ W( a
to move-turtles
" j* m- L& I4 M; K7 l6 ]2 d; X, b ask turtles [3 l" m' o# r# b7 H1 Z& ^
right random 360
: r' M& X! W" N. T9 d$ S% Y" z, y) H forward 1
+ [% r& I% T9 U+ b! ` set energy energy - 1
/ @0 g$ }2 t4 k4 L ]
2 ~% R% L( ~# ~4 Aend+ a- ^$ H$ b# _0 B! a
to setup-patches
% Z3 q7 {. E! q- n, f Y n ask patches [ set pcolor green ]
9 M# r! w3 e0 G4 T; mend% _8 q7 e; I- ]4 H) Z
to setup-turtles
) ~$ o" h0 o. O create-turtles 100+ J$ a- ]/ w$ n8 ^ E$ p. J1 \
ask turtles [ setxy random-xcor random-ycor ]
! ~. |8 d9 ?1 X* e0 t! i7 @ cend
0 f7 H: I6 R& `1 S! Mto eat-grass
, f! t* P! K% D2 w3 V ask turtles [
2 Q: [" \2 U) ^ if pcolor = green [4 T' i( G% k2 k) e1 B5 a
set pcolor black
& S/ S: @) [$ f' P$ d set energy (energy + 10)
" Q$ [1 j- S j/ M- P ]4 {' [9 Q$ B& E4 ~. h
ifelse show-energy?
, B$ l6 ]" t t( X [ set label energy ]) j S. k0 \8 C: C2 n, `( |
[ set label "" ]8 c! ^" E6 ~% d! q% e. F7 T) ]) O
]! V/ z `! i5 L, r4 o
end
& U) d- `% C! V/ _9 ~4 [to reproduce3 k3 A& [1 l7 [! t [
ask turtles [
2 [) t2 _0 g B) H/ T5 s! |8 E if energy > 50 [; u8 U+ ]* Q7 A
set energy energy - 50
" k2 e8 ]3 s3 {5 X( p! A; o* f* L hatch 1 [ set energy 50 ]: }9 w+ G* b/ q3 B. E8 t
]# Z: w- a7 l0 u: @5 Y2 s
]( w" ^4 P% l7 H; [* G
end3 U7 W- p( e8 Q' w8 r
to check-death
% a9 U% q) j+ S9 C ask turtles [
, g. R& J- F. ]/ J& E if energy <= 0 [ die ]
2 \5 `# K7 I* x+ ~0 `3 d ]
2 B! l8 W, v+ l6 ]1 @end: G6 ^$ n1 m% e* r
to regrow-grass
+ Y/ u7 d; I! T ask patches [9 i" k$ ?! X7 a4 u
if random 100 < 3 [ set pcolor green ], d' g+ f$ A& j5 M' e, Y
]0 i. i* A. `4 k) m! {
end
6 c* E% [* B, A/ w1 J1 F4 F9 ~to do-plots
# N- g/ d6 N; G" U- O r set-current-plot "Totals"% A0 S0 Z( [ c, h9 V9 q
set-current-plot-pen "turtles"9 `! ^/ G) L& p
plot count turtles
% j* O$ \, Y, p) _) a% J set-current-plot-pen "grass"8 R! w6 q) q1 t1 N
plot count patches with [pcolor = green] a4 x R- C% [/ d/ L
end4 j: _. r6 X% h- W8 [
可是运行时提示no such plot: "Totals"6 `5 s& E/ f% Q3 a
error while observer running SET-CURRENT-PLOT
. K; I0 I# Z4 N2 Q called by procedure DO-PLOTS
: u8 p( _" }' } called by procedure SETUP
0 u2 C" d- t1 S* k+ @7 A called by 按钮 'setup') Q3 B+ K9 A( d. M* q0 e8 i7 n
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
