我编的程序如下turtles-own [energy]
0 K* d, m& W# J! ^6 Bto setup |. u/ U6 ~. _6 e1 R5 D, }! B
clear-all$ c, ~( Y% Q8 o2 F R
setup-patches
+ S; s& k6 K6 J7 A# ^- e create-turtles 100
% P& u7 i& ^2 l do-plots
/ r0 R5 d1 k# \5 T: ?$ {+ j! G5 d ask turtles [ setxy random-xcor random-ycor ]
6 C/ [4 w C: U: ~2 ~3 ~end
: ?, v( f- E7 j. B. A1 bto go6 Q, N1 C; p7 k) z
move-turtles- x. I) f. c5 M2 z* K
eat-grass
" d7 U9 t5 y' L. H- F& ]$ C5 q reproduce4 o7 R4 G( l2 A& y
check-death
6 G5 J& g9 }+ E4 M! h) f regrow-grass
8 i! }6 k# k! |- W' A# Z do-plots% C8 F! Z" ]' n- f5 N6 g
end
/ U5 `9 b3 Y4 O7 s* K; tto move-turtles
. F$ y x; _" u) g ask turtles [- U# Z6 d/ b6 [+ X9 G
right random 360
0 l. d6 {, e4 R& [; a( p forward 1
. `/ Y. _7 U- S# ]0 t set energy energy - 1
; F7 O3 B, }! ?1 g3 I ]! p& S# S9 Y6 g* X; B
end
/ K" k2 P( Q" H+ r: X: B) S( jto setup-patches
2 X5 W0 E" z4 \& T2 E ask patches [ set pcolor green ]8 O# f2 R7 O$ t) V. F$ e& |
end
9 b* X$ X! t: y$ uto setup-turtles+ X# G3 e9 P6 p5 i0 K( C3 Q/ S
create-turtles 100- a5 f" J: \2 }- Y6 m2 Y4 i. X) O
ask turtles [ setxy random-xcor random-ycor ]
( L- F/ |. A! A) J) R' Q% Qend0 n B; _0 l* X8 ]9 q8 p& _/ l5 [
to eat-grass
! H7 v1 q u/ _ ask turtles [1 Q6 |! q9 ? ]0 H
if pcolor = green [+ R( s/ K! d9 l$ I9 |
set pcolor black6 l. a- J1 G( s" P8 o- x' f" n5 n+ H
set energy (energy + 10)9 O, s) a5 u$ _
]7 P6 c" G2 D: @
ifelse show-energy?
" o' p/ j- y a/ f: T/ M [ set label energy ]! n3 z! k" v d! x
[ set label "" ] m& m Q7 ]% M, u ]7 f$ k- X
]
/ k& o, O$ p. H+ hend
3 d; u: S7 I1 Zto reproduce' F. T5 g2 y# h; D1 I
ask turtles [
2 |3 | K, C6 p% m+ X% h0 u if energy > 50 [
$ v2 W8 I0 W, J. K+ O9 T) U& x set energy energy - 50% @0 C+ A9 d% L/ @* l# h# n
hatch 1 [ set energy 50 ]. n* D' Z6 L; W! I, C/ O. l
]3 Y; U, l, r, m
]
) x8 ?( t# Y3 [* e; Jend
( q* n: X' X; j1 Xto check-death2 d4 d) j# f. ^1 R! \8 n
ask turtles [
S5 s0 I2 X0 B if energy <= 0 [ die ]
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end
8 {+ v' v8 f# ]0 ]# ato regrow-grass) P, @% |$ K% t; S' F9 p
ask patches [
* X# E1 }# d0 ^2 w2 t& M% C if random 100 < 3 [ set pcolor green ]+ F& A& u! Z7 g E) _
]
; d5 d# o/ H. D9 @3 zend; m' d2 d3 h5 e0 t* V6 B
to do-plots
5 j. P3 d" t% g3 V, U set-current-plot "Totals"5 L5 z4 y% `, x: t6 E
set-current-plot-pen "turtles"
) v( t! k+ z4 f# X, { plot count turtles
5 q$ N/ _( ~# c) E+ p* S4 } set-current-plot-pen "grass"
( X0 s' m$ B9 ?6 _9 }5 F6 a2 t0 @. e plot count patches with [pcolor = green]4 K4 w3 X- X% @ U6 c
end
$ d0 q4 P0 H; P* S) X可是运行时提示no such plot: "Totals"
: o) y; y( ? f8 E; F8 nerror while observer running SET-CURRENT-PLOT( ^, Q! h$ k/ Q" B2 x
called by procedure DO-PLOTS
8 I! Y! c4 ?5 @ called by procedure SETUP1 K+ }3 e0 {3 V' s. L5 a
called by 按钮 'setup'$ m i1 W j# S* o( C/ a& l) a% o8 I
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
