我编的程序如下turtles-own [energy]
' n# D* A+ P& h. t$ f4 L! t& k; S" dto setup
: S; B: b$ y" P/ G8 w/ { clear-all0 t! @( u0 a* B. J+ x' [
setup-patches. N) _, d) E( l4 i) E- g; z3 H y
create-turtles 100
1 `6 h9 o! L! K0 o( [ | do-plots% j R0 K, A7 P; n( Z- h
ask turtles [ setxy random-xcor random-ycor ]8 s9 G- H/ ?7 F6 C F
end
" v4 ^8 l0 h1 l! D- v( }to go' M" }9 }2 H. V i
move-turtles
& G7 h' C5 x( p' z) D8 z" d eat-grass( Q; G' k$ l$ C5 B
reproduce
" s) Z$ s7 n" g( g% m check-death0 }3 d# Z0 S; n" m8 D
regrow-grass3 {1 f+ ?* i) ]0 Y; f
do-plots }7 E2 |0 r* U1 w) W+ a# _; O
end
+ \ d, v+ I- z0 ?0 G7 Z. g/ ]0 c, ato move-turtles8 Z7 P3 }+ g" I: |, y6 N- A2 J
ask turtles [6 H" a5 _3 @6 |0 f% o' ?/ G" q! I
right random 3601 D2 ]0 N/ M; `- j8 J2 h" u
forward 13 u2 \, \/ v/ ]- y% \
set energy energy - 18 @3 i" M; S+ M+ ?! [, T) ?
]
4 o- R$ @- a" r+ N3 I! a6 |0 zend
+ J& y) @+ A1 c8 W* B: L5 Ito setup-patches
0 w% \7 R( o2 ^6 T4 s$ O ask patches [ set pcolor green ]
% \' r5 L1 l9 I( T" T6 J5 Yend
# _; c8 f0 E- X9 vto setup-turtles" V+ S. [$ A f( l" a9 |
create-turtles 100
! r) a; H9 [ w+ ^# g* _ ask turtles [ setxy random-xcor random-ycor ], E5 U2 @5 V/ ]3 w, V; I* Y! C- F. f( {
end1 R- @7 r7 z7 I- ?+ E
to eat-grass
" c+ S7 T. _6 V7 d ask turtles [" e- g9 {' g7 U- t8 @. G
if pcolor = green [; H: ]0 x6 ?$ i. @9 ~+ |
set pcolor black
: W5 _1 D! k- V; J set energy (energy + 10)* @/ v- s& O! U, C
]
: i1 v% G. W0 U& M ifelse show-energy?0 Z; q2 T/ E. H$ j! x8 p: D
[ set label energy ]
$ M* @: W* I( W [ set label "" ]
6 h# H/ V' u! n" ]1 A) s: `& ~ ]. u( {# L* Q+ S) m4 R# u1 a H
end
8 {( v/ X3 ~9 [5 F- |$ sto reproduce
. x% {: a8 A+ |- K4 Y1 | ask turtles [! s. K' c7 X3 s4 X' D
if energy > 50 [& b/ Q8 ~9 d4 m+ {
set energy energy - 500 o( l, N0 _8 T/ U, @$ T
hatch 1 [ set energy 50 ]7 F/ E% A3 O& P$ c
]
x, R# c' Z8 R# \6 T ]
1 L6 c4 \% N; fend
, X. R: S7 o) y- J5 ]3 t0 [. ^to check-death/ B% T4 O L0 J0 R$ D' w" _
ask turtles [
$ ^& R; e2 O% _% t/ \& U; c if energy <= 0 [ die ]
0 O0 \5 N# S# \5 n9 v( s& x ]
, a# l4 _. a! Xend
, i1 g+ n0 R8 p1 P4 K' \+ Gto regrow-grass5 R) i! E) B' K* E
ask patches [5 q6 l3 r* k# { R
if random 100 < 3 [ set pcolor green ]* f) P5 M6 x5 L. `+ ^
]0 m& ?5 x; m; n
end
7 f2 b6 }+ k% w0 J, Y" dto do-plots H$ N% y* g9 G( x# b) F0 r
set-current-plot "Totals"# e) r4 V A' y. c* I, t
set-current-plot-pen "turtles"
# e- V5 s" b, [8 u8 ~* V* @ plot count turtles7 b* F; i! X6 y x( k1 @* D+ V
set-current-plot-pen "grass"" t' D' n! @$ l* }: ?& {2 V
plot count patches with [pcolor = green]$ t0 I, F* |, s- s" o5 Q, r
end
! b! c; i5 x3 ^7 d3 I可是运行时提示no such plot: "Totals"
$ J4 f# c8 A+ m% x. h$ cerror while observer running SET-CURRENT-PLOT2 t7 H: z4 G3 U+ a, f6 ~( {, m/ I
called by procedure DO-PLOTS
, R0 i' V2 n& F* d( H2 j8 s called by procedure SETUP& O% _$ h7 t7 x3 r0 G' x: [
called by 按钮 'setup'. P$ C' b8 _* i; c
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
