我编的程序如下turtles-own [energy]
# ?" |8 v: b" n' q/ {# n' `to setup7 s' Z+ \" z1 n$ a1 O+ p8 O& q7 ~
clear-all
# I) u% g, ^2 D0 J8 F setup-patches
" f( y' {. S" b& \5 w! x3 F {- y create-turtles 100
5 M9 E, Y t$ P; b5 p$ Q, m3 Y3 O do-plots
/ I' C" Q }8 c g, F& ]* D( M ask turtles [ setxy random-xcor random-ycor ]! [8 q2 k. g* `; X. y& F/ u
end
& N0 ~% C4 o- K! s! J Yto go
- T) I! ?" h& Y- S7 }" \ move-turtles+ d: }( W! M) m. K
eat-grass
+ u0 q' ^5 E3 P( m7 N reproduce% V0 C' B7 e# E/ @$ q: V3 @" j3 G
check-death
$ p8 W. E+ R/ I7 @6 x; \* W& T% T6 r regrow-grass3 r( V- j+ J7 A; }( i& L
do-plots
2 R7 n2 O$ M5 ^/ ]# ~end
: c4 p$ b5 f: u o+ F6 Y A3 \to move-turtles3 e; `$ |, t5 _9 {2 d
ask turtles [& ]+ r# F) {4 }, f
right random 3603 p1 t5 I0 }6 j `1 ^8 n
forward 1
# t% Q4 _7 G" ?' z/ R set energy energy - 1
: `/ B7 P/ t5 P8 D* Q0 S ]
6 [3 {+ }. Z0 L, S2 Lend
8 B$ ]! P7 m3 Y5 v1 sto setup-patches
S: p) f! U, n/ n# B3 X+ U ask patches [ set pcolor green ]
5 _& g+ N0 T* I/ ^6 r( D' \* D) dend t) C. L# p0 R, f
to setup-turtles s6 \9 _# \" H! b
create-turtles 100
1 s2 }: P. C& U# S$ U ask turtles [ setxy random-xcor random-ycor ]" Q) y" \ Y- y) s0 ]
end# L8 Q, [" w$ s/ U6 P
to eat-grass
; T( C( s8 C/ F* P7 U& K ask turtles [
, R9 Z, M% k$ {- h3 {" O1 q" [. n if pcolor = green [
4 `$ F. r9 Y7 ]2 [ set pcolor black
- U* t; ~$ R" H, S, X set energy (energy + 10)
' T% ]) y! J$ p3 Q3 ?8 s! U ]1 R) z0 K2 T$ W1 E
ifelse show-energy?
& ^2 y# s. u) y% p# t# k+ ]* M! B [ set label energy ]5 Z4 C9 w6 t! p0 ]# B
[ set label "" ]
$ U& _( ]2 d. v# r ]) K. _% V, _* O' o$ o- B% `
end
0 H& W$ N8 \ U$ fto reproduce
8 z) i/ b# L4 h. { ask turtles [7 x3 ], J) X. I
if energy > 50 [2 ^1 u$ C G# u% c( m
set energy energy - 50
0 t6 e" [5 a' C$ \) B! R* f& Z hatch 1 [ set energy 50 ]
( L$ c6 H/ H5 x" k ]
; Q! h/ N' S7 B& j ]
' t7 t. H8 i" e0 M; kend% F5 ]) l& G- t
to check-death
! _" p' f9 L- s% t% M" z ask turtles [
7 L/ C3 K; V, |" }+ \+ [' v; n if energy <= 0 [ die ]
* U8 O, R' n8 @$ G ]
% ?7 y( D% ?6 Q R) u: a; b2 O1 }; C7 tend- M& P4 x6 \5 b) S8 `
to regrow-grass- K) F( t) U! E) s& H4 s1 _& S6 k
ask patches [6 @, t( Q% b5 p( Q0 L+ j
if random 100 < 3 [ set pcolor green ]; z0 ?3 q: q/ A+ f& ?/ S" S
]
: Y+ h+ _1 n3 z3 U( k& k+ ?9 T5 Uend1 V+ T( u" A' i ?' @4 n0 i
to do-plots8 o. x6 m7 m' M
set-current-plot "Totals"4 u4 `4 G* R% T9 G9 h% O
set-current-plot-pen "turtles"
6 F- b0 Z% y1 P: w( o- v7 h plot count turtles
* ^# d$ {) Z8 x% o& Q @! ?1 } set-current-plot-pen "grass"% k) g3 b1 W1 P& Z/ N6 [+ X" [
plot count patches with [pcolor = green]& R- T& k; J; ^. x' S
end
2 o2 b) _6 v+ i可是运行时提示no such plot: "Totals"
; Q# O$ f" l ]* m Uerror while observer running SET-CURRENT-PLOT: w. V. P: o0 q2 h ?
called by procedure DO-PLOTS
2 G: d4 U: R# r called by procedure SETUP
& Q. t9 F( ?& T. e f. a( i' B called by 按钮 'setup'4 A6 N1 G1 T) `0 E' ^9 g
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
