我编的程序如下turtles-own [energy]; z( i3 i. ]% S, c K8 f6 d7 [0 W
to setup# y# I, r( ]+ v' k& B
clear-all
" T4 K( _0 K5 q! R4 i6 v' ]* M setup-patches! f! P, f' g0 H
create-turtles 100
6 X4 _) X8 p2 }8 k! l do-plots
3 u( n+ u0 R3 ^" n/ J6 M# Q ask turtles [ setxy random-xcor random-ycor ]! ]9 n0 ]; b( B0 u) Q# m2 C* o
end- V; B! w- X- M! [
to go4 x1 h! t: C" K- J
move-turtles
9 W7 } N8 [- g" s' l. v eat-grass
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check-death
# Y0 E3 X. p# o& P regrow-grass
3 C' z' R" U* G6 f/ V do-plots/ M) p5 d5 Q& M
end
. W$ p0 N1 U- F& y0 I" D: ^1 a$ e$ [1 ~: jto move-turtles! d. U! X( Q7 ?1 ~. H' ?! A
ask turtles [
, n# L4 g2 v% x1 w right random 360
( H6 t K" T" O5 W, N forward 1, x( N; a- l/ n, F6 q/ V
set energy energy - 1
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end0 P. @, `, R; n# V
to setup-patches
' k. l. n0 R. j3 j; X6 e3 w, a& G7 | ask patches [ set pcolor green ]6 ^; R- }: q' V+ o: V
end
% _! W4 {0 W! g8 [% G- Rto setup-turtles
% M8 ~( j0 V: q8 v8 E Y9 F$ [9 n create-turtles 100; x6 n* U) G% [" O. i! s
ask turtles [ setxy random-xcor random-ycor ]
. u4 Y& \: Y* {. S. iend
, u2 u+ w& d7 P& D' E: {/ ^) t% rto eat-grass2 K0 |: T8 ]- |/ K. }
ask turtles [
: Q z: p0 n: A/ u if pcolor = green [3 q3 ]0 P2 j R+ D5 l+ b$ Y
set pcolor black* D f; m4 g6 ` I5 D" j4 I# P: U
set energy (energy + 10)
, f4 Q1 b7 Q" m( Y/ Y' D- X# R ]
$ l8 L! r0 z$ R" k9 A0 O ifelse show-energy?+ v- b" {3 K8 M2 e
[ set label energy ]! v+ V$ i0 G1 ~) |
[ set label "" ]
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; l! h8 e6 f1 J3 X rend
t; I. n0 r8 k3 c# zto reproduce
7 p8 w" a4 }0 A# D2 k1 e- g ask turtles [
* k8 J- q& p- e7 I1 x. b4 ?/ U if energy > 50 [% C, x; @3 P- @% z+ _) H
set energy energy - 50
" g" K0 J. b: K/ z+ T) J4 Q hatch 1 [ set energy 50 ]# E7 a! z* C7 V2 }) o
]
7 s4 v; Y( t& C" m' E( S ]) S3 X* n* h1 e0 V
end
8 M5 d9 L9 m! d' _to check-death( e# @0 a( ]6 U1 \+ F/ ~* }+ M
ask turtles [3 U# D; T; w% V" p7 z( H
if energy <= 0 [ die ] C7 H% u* S5 c) ^5 ~* }( i5 {2 a
]
, q% V3 y9 y V+ o) D$ W2 g# V, lend
" S2 E" c/ I9 L( \) _; mto regrow-grass
6 t3 a. e6 v! ]) Z% D* i9 W ask patches [
8 t* _; N) K% K3 r b) d if random 100 < 3 [ set pcolor green ]
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end
, ^+ e) Z6 Q. C& }7 x/ b* s4 rto do-plots* b" ]" ^2 y" h" ~
set-current-plot "Totals"* M7 |. ?, B: e" ~6 T. A' w
set-current-plot-pen "turtles"
5 U+ L( G3 _' r% } e; \ plot count turtles
5 Y N3 m7 p z6 L C7 l9 w set-current-plot-pen "grass"% f7 g7 a* a; F- @
plot count patches with [pcolor = green]6 P6 s+ r P: l" e
end
/ w" _8 F1 n2 l$ b可是运行时提示no such plot: "Totals"
8 a! |6 I$ F" @* M4 \error while observer running SET-CURRENT-PLOT) ^$ v: Q; s+ X4 N
called by procedure DO-PLOTS( _0 V3 j' t' J- k9 j
called by procedure SETUP1 K( v* m k+ j. K
called by 按钮 'setup'; o: _: ?0 Y6 t W
求大神解答啊 |