我编的程序如下turtles-own [energy]
6 G" F( X9 X8 I* l0 r0 t% Bto setup/ [7 O! O0 j. b, a( a, u" Y! T! _0 ?
clear-all/ L) _. w H; f) O& A/ Q( s
setup-patches7 w/ Z' q! M8 n
create-turtles 100
7 F- t4 P% Z6 w do-plots5 v0 C# D( O* ^$ e" `
ask turtles [ setxy random-xcor random-ycor ]
b9 U! j& E: A ^end
) [% S6 k9 i$ S8 \' |0 vto go
p' l% {* g, N move-turtles; V$ G4 t) ^' f
eat-grass J/ A. j. X% s; E) J/ ?
reproduce6 K0 G' j9 D% ]* l3 s, l
check-death
* D2 |7 L6 R! E+ K" l1 p+ m9 J regrow-grass
2 y. J3 r: ]: s: } do-plots
; G' J8 ?4 i/ O0 h% b6 [end4 C; E8 U6 G5 `' ~
to move-turtles
) b4 _: u/ X- D' u* ]2 K; @$ g7 P6 n ask turtles [
9 `# A6 N' r* Z9 K right random 360- _; E/ m3 u9 Y k1 ^$ n
forward 1# K' N' m5 [+ p8 J
set energy energy - 14 T" N6 t8 f' O. M
]
# U7 F! b( u3 L" i. [end
* U# W0 N( V8 gto setup-patches
$ C O6 l+ y& q9 `+ S; h# e) x ask patches [ set pcolor green ]
: K( f( A: I5 R7 |+ U' h! w* z2 Iend
, T u# G& }% ]2 m8 t1 c# Bto setup-turtles7 Z. j1 u* l4 f; S: \3 |- I
create-turtles 100
& ~7 X: K" }4 S* a* i" S ask turtles [ setxy random-xcor random-ycor ]
! X N1 {- v3 S; X( Gend D4 B# E- [3 c t( B# g: K2 H
to eat-grass
0 `1 A& b3 S/ W A; k5 x ask turtles [
* S# p+ r5 |2 l, I% f# L if pcolor = green [3 r, Z" {( t; O( t# b: ?$ D; C
set pcolor black- T+ d* S) }, d5 r8 z) ^9 N& B7 ?/ M
set energy (energy + 10). M/ `6 ~' t. \5 ~
]
* O) l' G7 i6 {3 I- } ifelse show-energy?2 O# C$ |& ?. Q" ?
[ set label energy ]! M* E, `8 [; s3 K9 B" `
[ set label "" ]
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+ H1 L4 `5 Q$ a3 S0 k6 J5 oend
, l1 b& g: B% c- [* X9 A" kto reproduce
' d7 | M! p* j+ u2 r* ~* [6 z ask turtles [; }' Y2 ]' A% R# {7 Y: H8 |
if energy > 50 [
. V( v6 C9 c; l: }' u" k5 _ set energy energy - 503 X9 {4 U7 M. h) \ C+ T- V) z
hatch 1 [ set energy 50 ]4 k$ u" [( r+ z( f" F0 ^! W( N" i1 [
]; Y( B. C. ] B3 i4 e7 y( q$ Q6 ]0 N
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end1 i# ~8 E3 |: U+ _# Y6 X
to check-death
. f% G; J) y1 B( X5 a ask turtles [, j3 S% @" l' ]6 d1 c5 B* y" T
if energy <= 0 [ die ]" o3 h( x" k9 i1 j$ q& D9 |7 Q, B, e
]
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to regrow-grass+ y7 N( B$ r4 b6 J
ask patches [( d8 p. v$ H# f, k' q
if random 100 < 3 [ set pcolor green ]
& ?8 r1 j# ?3 g! ] ]
: N% t H1 R" K6 xend+ F: G$ R( p. t6 F$ ]5 F( g3 i
to do-plots
9 Z6 a" @0 E# s. D+ ~" X set-current-plot "Totals"
4 w. d* `$ K G8 a% }0 X1 L set-current-plot-pen "turtles") @' M& `3 L" u/ G
plot count turtles4 j. Y! i2 }. J5 _) T
set-current-plot-pen "grass"
$ Q1 M: w4 \: l plot count patches with [pcolor = green]
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可是运行时提示no such plot: "Totals"3 \7 v0 h: J( }
error while observer running SET-CURRENT-PLOT
1 z \; x. |* d" A0 X* A called by procedure DO-PLOTS
; S9 P+ X. q5 o- q) c" O+ c called by procedure SETUP" {$ L2 K7 U3 ]. V1 j# Y* T3 F- W# P
called by 按钮 'setup'
5 @) N6 W* t% k( r/ F, A1 @8 X' Y求大神解答啊 |