我编的程序如下turtles-own [energy]% ^, d! t3 `3 O6 l1 A# s. M
to setup { k9 _8 T" o! L/ }/ M9 Z' t
clear-all
% T) k1 A% D- S" y( \) H setup-patches8 Z6 ~. m5 a; W. L
create-turtles 100- y% F* S0 V% B; i% }
do-plots/ ^2 T6 X% c, {- T5 h+ W
ask turtles [ setxy random-xcor random-ycor ]* Y. N/ R6 T& X/ q! T
end: Y# w, k0 _; U4 g
to go% o v* b. Y! a9 T
move-turtles
. D! Y" U. h! t; D) R' C$ b4 g eat-grass
& ^- ^8 g+ m" f) {3 G reproduce
; X. P$ m: \; q- V. X! Q+ q, x1 B check-death& J( X! j' A2 e( T P, S
regrow-grass6 F; q8 K E4 Z& |3 o+ _
do-plots1 \/ |- b+ @, b0 ^. n
end/ X: G9 G/ ~- @
to move-turtles! d/ f5 d/ t% F0 p5 z% J; @
ask turtles [
i: \; c) { G* ~/ A8 y' Z right random 3604 i4 _! ~. {8 ]4 w5 H4 F+ d9 O% G; |
forward 1
/ n! L" }, ?& _# J set energy energy - 1
, s9 M3 l7 l* l ]# q. n# c/ ^4 y) p
end
# J' Z9 D6 k1 s" v' `% ]: w) kto setup-patches/ Z0 ?' c+ ]4 {3 l l
ask patches [ set pcolor green ], t- Q9 ]/ n3 R8 M3 i
end5 s2 e9 Z: ~- P, X5 ^" y3 O9 y
to setup-turtles. K0 }3 n) i! p. U# G: Q( G' x
create-turtles 1004 h7 ?; s9 B" y3 c& o$ x) U0 {
ask turtles [ setxy random-xcor random-ycor ]! a) y; e( q. g# ^7 W
end
- n: s; C; C/ M; Q+ h, D, qto eat-grass/ h; w) t4 X6 a" i& A g! \
ask turtles [
3 {& J% ]! \, k$ N if pcolor = green [
) e' P. Z5 M4 _- d8 i/ {' t( G set pcolor black
2 v7 ~7 M5 N7 ?; Z+ A3 E0 |) z; U" R4 B set energy (energy + 10)
! B: p0 g, r# x$ Y ]$ M# F2 z) b# n& a) x) @; R: U
ifelse show-energy?
( [0 N( c4 Q. k' H3 W/ E2 S- I! A [ set label energy ]
; g( ^. M4 _( {) f1 P p0 S [ set label "" ] O* s( N* n* T/ k, z0 W0 g: K. b3 v
]9 I1 a3 @$ p* t( r4 P
end$ @# V5 ^& [/ e2 j" u
to reproduce
( l3 ] j7 Q) [2 |. Y- a2 U ask turtles [' ~; c. Y; H1 l" n/ j: ?
if energy > 50 [) U$ g: Y) s7 ]
set energy energy - 50/ H- }, i8 F) T7 |
hatch 1 [ set energy 50 ]
$ W* z" @0 ?/ s* E7 h0 u ]- R- \ N5 G u6 `6 u8 p& g$ s
]: `8 z" O3 I+ v
end5 n) Q- f4 e/ e- E
to check-death! ~& D2 n C( I, `
ask turtles [& P( h' Z, t. H- W) [, y
if energy <= 0 [ die ]
: p7 y4 U) @1 Z$ U4 p& I0 G: } ]
7 T1 B+ I: T- r8 ], \9 ^- tend
* c: x+ `5 g& V+ G; Dto regrow-grass
& N1 C- n1 B: v8 l$ A9 F3 i ask patches [) m1 ^- L5 d& S2 ?' n, \
if random 100 < 3 [ set pcolor green ]% d" R* T6 C; U6 @. w
], f" W& h# |& p& H
end
9 h" a6 X) y6 c( D4 x, }% Cto do-plots
2 F5 @8 w8 q; w3 G2 c set-current-plot "Totals"
$ R8 a+ Z1 S" B$ }7 p3 ] set-current-plot-pen "turtles"3 n* O4 A; }! r0 A8 G( t9 V
plot count turtles) l7 V6 u* t( R( G( [
set-current-plot-pen "grass"8 Z. F) J% H& {! V: S; ]
plot count patches with [pcolor = green]9 A# Z4 m) T' Q8 H' Y; i Q1 n: V
end* H$ {5 S) d* m5 Q1 J8 Z
可是运行时提示no such plot: "Totals"0 h$ @; Z/ |1 a% o- S! D
error while observer running SET-CURRENT-PLOT
% W: V ?0 s1 _( X1 `: p called by procedure DO-PLOTS% H' L8 w) L5 C$ Q) t |! e. y, j
called by procedure SETUP
! L6 [/ u3 A2 `+ U$ Y called by 按钮 'setup'' f$ G L! u( y
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
