我编的程序如下turtles-own [energy]
$ L& J6 m0 B8 E( D! Xto setup7 `$ h% m1 p8 l6 m
clear-all" I) u2 ]& ]! f$ x5 h$ \8 z8 n( n
setup-patches! v/ H/ l: ~4 g# B- a# o" ~6 D
create-turtles 100
1 R/ K v# U. R% o% t/ l do-plots
) X8 J0 t! K+ E3 } ask turtles [ setxy random-xcor random-ycor ]
?$ ~6 Z! h; U) M$ wend
; R2 i: a: ] C8 u( K( ito go
1 U) a" [. [1 I' ^% u" A move-turtles% S/ ^& j+ [ d9 ]) R! [
eat-grass4 | a) L, _5 @; S0 A3 T2 v4 u# `' J
reproduce: M/ e) \. b: s1 Y3 A. a
check-death) v- n4 ~4 @$ D1 e
regrow-grass
' [% z k" a( Y1 q) J* p do-plots7 h5 |" ~" b( z! S' R
end
$ s9 N O7 _: ^5 Mto move-turtles$ Z3 ]% u! ]/ a( j7 d2 |6 ~
ask turtles [
& B( q$ ?+ d" r) A5 y9 j9 R, w right random 360
, h1 o' n8 I. G% \ forward 1
1 r3 J; O+ | ]8 d! N+ R& a set energy energy - 1
- O% W2 Y' E0 a1 S0 u p/ r ]1 u. {" O- b, K, }1 Q6 T$ y
end
% {, M0 I& g0 _8 ?to setup-patches% v4 e9 w& h f) l) d" {. q" u z
ask patches [ set pcolor green ]$ L& l* F5 i6 @9 B
end
% S" }! Y' @7 M2 b& x: Uto setup-turtles/ p% Z* i1 ]7 s5 j- o' y' y( X( l
create-turtles 100
5 _4 \! B1 C! [7 l- d2 ^6 H ask turtles [ setxy random-xcor random-ycor ]
2 l. K2 {! y/ E) Z5 U n9 Q0 m$ _end
! o# U- T, }8 j& [to eat-grass( E1 M% d% k2 \: `
ask turtles [ C. ], h4 C- N1 ]: I% B
if pcolor = green [! g7 o. G7 c; `; X; X
set pcolor black2 q7 }' L# H6 q) r7 G7 r
set energy (energy + 10)
@0 y& O- F' B `. ]( @ ]
) k2 N$ C L; r$ l ifelse show-energy?' n7 L* {, r, W
[ set label energy ], k7 s4 c( w% D. T j" z, u0 p
[ set label "" ]( b$ F' P, [ l/ V/ F
]/ ^8 ~# y5 l( A+ e$ Q- K; ]( r8 f
end
% M6 }0 y! I! ]" Z3 V' l' Qto reproduce
0 u8 s8 I/ ~! ?! A& h% k( w* b ask turtles [
* T) Y% Y) T% `8 P0 R- b if energy > 50 [
9 X) s( ]1 g4 D$ ?) z! ] E set energy energy - 50$ h# E# `- k6 L
hatch 1 [ set energy 50 ]( z0 g: \6 Z, D3 e! W7 P
] a* L4 y G) `0 \
]1 J. ^; x0 B! q
end
4 M! N; {; j/ i5 S5 t% Mto check-death4 U/ F: e$ Y) w' ]# c
ask turtles [5 a# K- A5 T+ x! S7 J1 _* c% W( X5 t6 H
if energy <= 0 [ die ]; W7 L I5 ?% g6 j5 z* D
]8 G9 n |; D/ z. z+ n- b. ~
end7 Z0 h) E( J% s3 Y" \# Z. l
to regrow-grass. e+ E: I6 q/ G
ask patches [
: _/ J4 ]3 t' p! L; k2 M L if random 100 < 3 [ set pcolor green ]! F" f4 ~8 f/ Q5 w) ?" @
]* [3 G9 e' X Q) z+ h
end
: d/ N- }- q3 A0 I$ h2 ]( q3 Gto do-plots
& {2 B7 r# n$ q set-current-plot "Totals"
t7 e' d1 i7 A8 d% @! Q& G: o set-current-plot-pen "turtles" N. u: b9 |1 s! m- s( K
plot count turtles
9 w. m7 \# Q! a6 x1 {; y set-current-plot-pen "grass"
0 J8 G% _4 r) }1 w& q/ ]2 E/ t plot count patches with [pcolor = green]+ ` z$ H0 P2 x$ m- J
end
$ n0 M' {0 ~; a! L2 L可是运行时提示no such plot: "Totals"
3 G& e$ w4 ]- ~# _error while observer running SET-CURRENT-PLOT
3 N g/ \7 ~4 J3 Q. v called by procedure DO-PLOTS0 m* }0 r/ M1 S, p
called by procedure SETUP1 V' o6 k; ? e# y
called by 按钮 'setup') y. @1 P0 H$ ^
求大神解答啊 |