我编的程序如下turtles-own [energy]; q7 N& h! z9 h7 n& ?' N+ O: X
to setup
- }! I- T }* |, [, k$ h clear-all8 i( {9 _6 y+ i9 s" u8 ]
setup-patches+ m2 l7 L; @( C/ k7 O9 m" D
create-turtles 100
) X# V9 ^0 P5 N; W7 X' F; a do-plots3 A' z! W0 }" ?
ask turtles [ setxy random-xcor random-ycor ]
7 |, h8 g! |& q$ qend
2 @1 H7 n$ H. k2 U* n% [# }, ~to go6 T. J$ M$ \2 g
move-turtles
% `/ z( y5 Q9 _% u: h- N eat-grass; ~; c- `+ j* H" w, m& ^0 E1 l$ A0 g
reproduce# Y5 o6 i* h" `
check-death* d) v8 G8 f4 ?- g
regrow-grass! B% B3 l5 e, |
do-plots% @; h# A1 a* Q3 v/ p( @+ w& P
end
* |& H9 S) M. |. i+ U& eto move-turtles3 O) N% G% l( t% |
ask turtles [& N: z4 Z: Y% N* S) `& [! x2 x
right random 3608 T4 [: I6 `3 q3 h
forward 1
2 p# o! s1 S& Q; x% l: b set energy energy - 1
: H! S- G7 M! u6 R& |$ W ]8 F" m9 d. B: d' ^1 _* g' ^
end+ R$ D! Z! R, [
to setup-patches
4 H. [% D! U& ~: S ask patches [ set pcolor green ]$ y: A' `- @8 d# b1 ?* Z
end
6 S' F3 I2 q' S' h3 @- `to setup-turtles9 a: q! ~1 `1 f7 J
create-turtles 100
- @# A6 @$ c1 D. m w ask turtles [ setxy random-xcor random-ycor ]
P. ~. Q% P% |9 K% b7 s/ E- kend8 E6 u3 k0 x. z: f0 u
to eat-grass
7 j5 V9 N: O+ `: B ask turtles [
/ Z- P' Z8 s! B+ u+ O' J* x if pcolor = green [
8 ]2 T) t. k( D0 F set pcolor black6 l+ B8 {1 I* X9 X9 |& `
set energy (energy + 10)
0 M/ v) F2 _% `% A2 w ]
& \" P0 V1 R( f- Q/ x ifelse show-energy?% b; J/ [4 h/ M; G) X; r( F2 o
[ set label energy ]
; D4 B5 v9 w+ v5 G0 x. I' K" D [ set label "" ]$ y% V4 G" U; a* }
]
0 z4 j1 \ i; n. A% D9 q. Send
- @9 V) w1 V4 v) ] a7 J/ jto reproduce) A6 e9 s! s) Z+ P9 v
ask turtles [
7 V1 ^- v+ |; B) c; J7 Z if energy > 50 [. ]$ R6 @; m7 v6 k" k
set energy energy - 50
2 k. D4 }) Y4 Z* y8 B hatch 1 [ set energy 50 ]! E# e, c& A. T; n6 L
]
2 X: k8 W$ ]* Q/ w& z5 X ]
( a4 N% a _3 yend a$ }& b9 G7 Y' p) i3 F- ?
to check-death
/ s ^/ i) f3 T8 @! o ask turtles [7 ? l% }7 F5 Z4 }
if energy <= 0 [ die ]0 {- ^" u: F/ S. n% C$ m
]
0 ~- U& [3 \7 _$ Q5 D2 C+ ~end
- ^+ \4 G% ` f: ]9 Lto regrow-grass' T a6 W# b L7 w7 m
ask patches [
# B' }3 ]) B( L7 R. C1 r if random 100 < 3 [ set pcolor green ]
% U- G# u' _9 N& u+ z* Q ]
: ]4 ^% X' s* e eend
& ]3 A( _1 D, H+ Jto do-plots! ~4 }& H! K0 n
set-current-plot "Totals"; C+ q; a/ a# w1 I) {6 t* T. g) d0 l
set-current-plot-pen "turtles"7 Z" B0 Y1 x- e. l) P/ ^ X# R
plot count turtles* S, Z4 |; M$ J: Q4 c, ]
set-current-plot-pen "grass"1 |5 c" ]/ K9 h4 u
plot count patches with [pcolor = green]4 N X+ }# @+ |# O+ \
end! S8 x; P# O# W; i0 ]
可是运行时提示no such plot: "Totals"
* B; Y, }- n( S3 C( ierror while observer running SET-CURRENT-PLOT
( x/ z3 S7 j O3 }# ]; b called by procedure DO-PLOTS
3 B# u) d* b0 l$ x6 b1 U5 d called by procedure SETUP2 h" p; x1 r/ D; Q
called by 按钮 'setup'9 O" P" K4 J4 [0 P3 \( Z2 p
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
