我编的程序如下turtles-own [energy]! k$ E; n% A( K1 e8 p A- s. @ ]) g8 o
to setup
) E. W- O! k( ~$ E, [" ^- m clear-all' h6 V1 a4 X5 `- C( v* E# j7 {5 ~+ B }
setup-patches" L! K& g5 H/ {) W3 N4 F4 z
create-turtles 1000 l0 P4 }! m {
do-plots8 K, ~8 V; u+ L) A
ask turtles [ setxy random-xcor random-ycor ]
T) z0 P$ r% [! pend
7 O/ N f( ^- S3 I2 z8 a) X* pto go
& [2 o, r5 i3 y. q; D2 T move-turtles
, h# E8 m$ A' x( k9 ~+ ~+ t eat-grass
' [7 P) E4 r# _, F reproduce
. \; w" ~! |4 c. [: l& g check-death
}% f! o( L( Z9 o+ @# a regrow-grass
5 J1 |1 S& ^; F- g do-plots
$ x- v; R, s- y" Rend1 f+ p6 m, ?" g6 S
to move-turtles
- m/ v/ ~: _; o. M ask turtles [
6 b/ Z0 s$ m' E8 Y3 t0 O! h right random 360
# g1 P5 j; u: o# q forward 14 ?1 m5 T8 [4 D3 }0 G# E h
set energy energy - 1
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end
# J' R! r6 h" X' Y i2 s- |to setup-patches/ r, M/ c3 s: m. b5 q
ask patches [ set pcolor green ]4 S" q w' Q: p
end B3 }; ^! n1 I! m
to setup-turtles% h5 J; A2 x# k* A Q0 C2 R
create-turtles 1001 P/ G7 }+ @$ g8 M+ t; j
ask turtles [ setxy random-xcor random-ycor ]
* p. m C/ I6 q) `( P0 @/ d9 rend
& C: X+ ^3 I: u: L8 D4 H: R& vto eat-grass
7 q- n1 u5 w+ D ask turtles [0 i/ }6 T7 W" D) {0 |
if pcolor = green [
+ f: y$ S" j7 T( n4 T+ L! J; o set pcolor black" }$ J, P" _9 e( h2 e( \+ _% R
set energy (energy + 10)
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: P# _" i9 |3 n! f2 ^7 ?0 | ifelse show-energy?! K9 O! n! C4 U4 f5 j: M
[ set label energy ]
' B4 h3 K" u( _/ u: M6 G3 \ [ set label "" ]
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- @/ P1 e r' Kend
: i& r" w& d A8 Lto reproduce/ k, g: }' S. ]# D9 [% j
ask turtles [
& n6 ?( W( W0 w if energy > 50 [/ b9 T5 v3 p& F4 h4 N
set energy energy - 50
+ S" @5 o/ R7 K" V8 L2 i hatch 1 [ set energy 50 ]
* K/ j2 |( e! \7 h% l ~ ]' v: O# ~/ @6 q6 N9 S$ x o; `. ^
]
5 |; J, P% d# K- Q# R4 C gend" p' H5 b, O- D7 A$ u! U H* N
to check-death
% x# }3 j `8 F* v" r( U ask turtles [
8 C; [% R0 y6 k* p" v if energy <= 0 [ die ]
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! x0 V+ c, ?4 ] H+ w! Z- U2 n) I' `end
! v0 Q) i7 K0 qto regrow-grass1 z( M2 ~( Y+ B/ U5 C" R
ask patches [9 _6 V! K% W( k! N* u" P& `8 J
if random 100 < 3 [ set pcolor green ]. x \' @ ?: Z; O
]7 [8 } b: T5 D2 K: G
end
2 p }( C- I4 ? W3 A5 R' yto do-plots
3 S6 a- X0 b- x9 {9 r' k set-current-plot "Totals"
+ F% [3 C& q% O8 E set-current-plot-pen "turtles"
/ c' v6 {* k+ G$ |1 G7 c$ B plot count turtles/ ^, p: i7 l. v$ U3 p/ U& z
set-current-plot-pen "grass"+ {. [4 v$ z$ U( Z5 p
plot count patches with [pcolor = green]6 n4 g* x5 T9 V
end0 F8 W: B' d; t' H3 a2 i
可是运行时提示no such plot: "Totals"1 m- i; Z* T, n* l, z( z' M; P
error while observer running SET-CURRENT-PLOT
" D. j4 S' I ^8 W" s0 u called by procedure DO-PLOTS
- E! J" [8 ~3 Z% a called by procedure SETUP
$ Y8 F# j2 |+ U2 X called by 按钮 'setup'
1 i5 q# k7 O) P" t+ ^' ]求大神解答啊 |