我编的程序如下turtles-own [energy]
0 I8 q- j. Q) k5 c8 W7 n# tto setup, E8 D1 H5 n& r2 z! H
clear-all
" \. P3 E* h' t setup-patches D! a8 Y4 y6 u" r
create-turtles 100
4 Z6 P* Z1 S; r! B+ f7 W. R; Y do-plots
% o U' Q% j- B9 N$ F ask turtles [ setxy random-xcor random-ycor ]
5 d) Y1 @& u' ^/ l4 e6 [2 \end
( S1 k" `4 \5 O+ g+ e) I5 t/ ~5 Wto go
4 }2 X: Q6 L* S6 A move-turtles
* f2 R2 J/ }6 h% y4 ^! U) e eat-grass
O5 O, {# w! s' _! L& k2 N reproduce; [6 M; C. \/ a' D
check-death
: O, M+ B, `9 V% d regrow-grass# o+ @! E- K2 W* t, a
do-plots
3 `3 \% [, Y* b y, O Hend
" Y4 c3 |" L+ A) O( u6 ~to move-turtles
3 e; E5 Z* c( y; `6 o ask turtles [
6 Y! N! w& k9 ^% q ~ ?1 a/ _) S right random 360
/ Y/ r% b9 u0 { D forward 1
, I) z8 G3 x T set energy energy - 1
' p% ?4 _' E+ R- L0 j$ V" P ]
0 Y3 J0 A8 b$ i" g5 P( q9 [& Gend
% O9 ]8 k" V8 e6 i+ ]8 c7 G6 u" Oto setup-patches8 N/ D' f0 P& U: X( u9 \5 P( Y
ask patches [ set pcolor green ]# ^! b a% w2 X
end
( k! j6 C5 [) \, @to setup-turtles# q( Y4 x, P7 C4 c
create-turtles 100
' c5 Q7 ]7 p) m; m! F* h8 a, S( S: D ask turtles [ setxy random-xcor random-ycor ]
, Y) K# ]! t2 G0 {# U0 Hend0 M, F. e( f2 y3 _/ w
to eat-grass
1 |/ O1 G; ?/ U: E ask turtles [
$ Z3 _+ M" m \3 A4 B if pcolor = green [
9 X3 x+ R5 Y+ H9 I5 V" e2 } set pcolor black1 D* N" }- f2 S1 u5 V+ c( z# s
set energy (energy + 10); Z9 A$ ^: f' @$ D. _, d
]
1 [' l: h0 @6 [0 _8 |- @# ^ ifelse show-energy?
, M. u3 Z5 V3 f0 e$ r! ~ [ set label energy ]
, g9 k0 }7 D8 X3 o F [ set label "" ]
& p7 Z6 Q- F4 T! m* d- z; f ]
5 T6 v0 d2 \9 l" q. nend
2 b! ^% D3 b: v; [( F& ?to reproduce P( _4 [' O; \
ask turtles [. v: i% s G4 u5 @5 g! G
if energy > 50 [
p' B1 @. d0 P( w3 E set energy energy - 50& E2 k6 f: v6 g, A* o3 `0 Q
hatch 1 [ set energy 50 ]2 y6 o, m8 r# J9 y Q4 ]
]8 ]/ R: O0 V; W& X$ N
]4 `$ p& q; w, L4 X
end& t r7 Y& j; I* X; q S. d' g
to check-death+ m8 `2 [$ d7 j
ask turtles [8 I$ k* }: C: Q6 U% |3 k
if energy <= 0 [ die ]
) F: X# N1 N8 Y- Y* q# n6 z ]
% m4 q r5 I. {7 Pend
u) S! E e5 P* kto regrow-grass
( l% f1 ], z+ q+ [0 w2 g ask patches [
1 ^! b/ q9 y( M" | D if random 100 < 3 [ set pcolor green ]+ c/ D9 y- A- S8 ^( t+ m8 P7 r
]
# M: q5 x7 v4 _( iend+ P0 N% p4 J: d' A
to do-plots
; t: H: X5 Z/ t% ?" h9 p; y) l set-current-plot "Totals": |' q: [# b2 K$ q; I+ k# ~ E! A
set-current-plot-pen "turtles"
+ v T) s2 H) T& G% T4 P- ~5 G) J1 J plot count turtles
4 E2 G: r0 N: ?' M set-current-plot-pen "grass"( Y" G }& b7 `7 o* r3 q( R
plot count patches with [pcolor = green]& e' g+ s* ^& e
end; S5 o8 {; b/ h5 J$ c# Y
可是运行时提示no such plot: "Totals"
2 R( I* ?+ ]& }8 m8 Q8 k# zerror while observer running SET-CURRENT-PLOT
- n4 G" V4 F2 s' E0 W) T- ^ v called by procedure DO-PLOTS
5 D9 B g2 u) J! J called by procedure SETUP
* H+ {% b$ H$ _5 w( D" f called by 按钮 'setup'
n0 N: G8 q& u# I" Q4 d3 x. @2 v: U求大神解答啊 |