我编的程序如下turtles-own [energy]
5 r5 }) }9 x9 u9 Fto setup5 ]: p" `( U$ u; t7 M6 o) n( v
clear-all! |4 ~: }( t# J" @1 Y3 _" n
setup-patches, R; U" w% {: X2 x7 J
create-turtles 1001 @) m( G) e' l
do-plots0 Z9 A, O4 Y+ M) J- t
ask turtles [ setxy random-xcor random-ycor ]
" Y' D Y* m! @+ U, S* p: Q3 Q8 Uend# W5 t3 D! `) f, d2 Z4 h5 [0 ^
to go
2 {$ M; `6 P1 ~! M move-turtles
6 E. R5 {2 W0 ~; K eat-grass
( q1 N. I1 F) g ]* [# V4 H Y' Z& k reproduce
* D& @/ \8 }6 O8 f% G* O check-death9 p ?) O% E4 J0 _& p
regrow-grass
7 z0 D- |% c+ \2 J E do-plots6 Q6 M' H/ w# r& H+ M
end9 y2 j: Y4 m# ], r/ K4 o
to move-turtles
3 y5 j' N; t! W) a# J p# { ask turtles [
2 D: D* H3 f8 {+ ^: q right random 360
/ ~( J& B- m% Z8 y4 A! k- A' @ forward 1
- u: Q, N: D# V8 z! [. X: q set energy energy - 1
3 d l' \ {( r ]5 ^: e/ q; g- @% r ^7 W
end4 I1 b6 ]+ Q7 A' {' |
to setup-patches; C! }* M6 O( E
ask patches [ set pcolor green ]
& `7 w& m- @6 G* gend
u* J$ ?! J, {4 Xto setup-turtles+ D) L, \- C& u! s
create-turtles 100
. j: Y+ u) i- M. \ ask turtles [ setxy random-xcor random-ycor ]* e" y$ `& r8 V+ t! U9 S* M
end( x4 }% Q/ t7 Y" G4 @
to eat-grass, O9 Q0 X# M, _
ask turtles [
$ O( W! s& u* N. k e; E if pcolor = green [( s! L+ K6 K" l( h" @2 q5 p
set pcolor black
$ X* V. ~* U$ k6 m8 e% ^! w3 A set energy (energy + 10)+ l& N! h3 d5 k U" T: Y% L, u
]) |" l. a! C0 }, z
ifelse show-energy?
. o) `# J+ T- S/ ^) _ [ set label energy ]7 Q6 W+ k3 W9 u5 r- O& Q
[ set label "" ]
6 [% q3 v/ ^+ w& b ]
: _! v0 h7 v+ E# n, m. B1 Send
5 e' h7 C E9 Q3 V) W eto reproduce, y1 O! N/ A1 F& s( f
ask turtles [# Q8 V& P) T9 |5 Q) s4 z
if energy > 50 [8 E& {6 Y1 a4 ?2 z
set energy energy - 504 H4 F- Z. y% T7 W C) T$ A( b! J' ?
hatch 1 [ set energy 50 ]0 w: Y: D5 G9 |+ a W5 b9 a4 G, j
]
% [, S0 w( N8 n1 X* ` ]
( r" u. {1 I. H3 K( Mend
L" }4 e& h! E+ f7 uto check-death
# D% Z: F, b5 z- |8 [" P! q ask turtles [2 ]; o! h; [5 }, n
if energy <= 0 [ die ]
; f P4 [* O0 L6 w6 Y& P: Y. h; B ]6 E& m4 M3 @3 T3 S$ C" C
end
+ C' W0 N+ H7 H4 i! w" l5 Gto regrow-grass
2 p7 B) i4 h9 X- ~ ask patches [! Y! J6 w8 I$ m- s* L5 h
if random 100 < 3 [ set pcolor green ]
1 n1 T# G9 z1 O8 J0 E ]6 g" y% {( P) }5 R1 B. ]" X
end
1 E9 Q1 i h1 Q; F' ^: lto do-plots7 b1 O" h4 ?* K2 l
set-current-plot "Totals"; t7 b& x! t {5 E
set-current-plot-pen "turtles"& M2 J" i1 R7 F6 ~' }, p8 E( q
plot count turtles7 z Y! w4 `2 a z
set-current-plot-pen "grass"1 o; o$ P% m: Z2 V [! J
plot count patches with [pcolor = green]$ S0 U* \ {( ]4 Y8 e
end" x; W. E! P+ E! a# l" d0 o
可是运行时提示no such plot: "Totals"
; w1 `8 N7 @8 b( serror while observer running SET-CURRENT-PLOT
* o. a& b$ q. ]* {" t, p1 u2 j/ H called by procedure DO-PLOTS4 I6 |; ?. Z$ s5 s: \
called by procedure SETUP
% W9 @, r4 B9 [/ F called by 按钮 'setup'
. D3 `- y+ G; f8 T2 f0 u$ ^求大神解答啊 |