我编的程序如下turtles-own [energy]
9 N/ t- ]7 [* h3 s' Rto setup
) n' w: l( F; r clear-all& @, M3 U' e/ H N Y. S5 x; p
setup-patches3 o, \( L7 @3 |2 u
create-turtles 1000 {( y1 j! x) n( s8 `: e
do-plots
7 V! t E4 c! I- S ask turtles [ setxy random-xcor random-ycor ]: D( D9 y/ o$ |% W
end
. [; y4 ?1 j1 a2 [to go
" ^5 @9 d* V1 A2 j: w. H$ M move-turtles0 I" z2 p3 B( L* x; g
eat-grass' a# W: v1 L1 P/ U& @7 e
reproduce( \8 Y, q) I+ X& y6 |5 @
check-death
3 }3 R6 v7 h4 o6 Y2 v0 M6 h2 h regrow-grass
+ K8 ?) M/ }8 C2 ~8 J& b% z) W- Y, d do-plots/ P$ s0 l. R6 T- W/ o7 l6 ^% p
end
% b- S l( O6 C: Q- ?to move-turtles
+ d5 r& |( }& } ask turtles [
8 c6 F2 ~( y2 w! Q, `7 K* h right random 3605 o5 k3 f9 w w/ d( g0 S
forward 1( ~. ~6 ~. |( S7 v
set energy energy - 1
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end' d% E) p& ^. x! }
to setup-patches6 V0 J$ ^3 a5 y3 ~$ ?- J
ask patches [ set pcolor green ]
' e5 N$ }' \ u5 x6 vend2 A) U- i! R! p& A) G
to setup-turtles
! C2 Y# Q5 Z& O! h9 y5 Y create-turtles 100% r! G) s) f6 C9 P
ask turtles [ setxy random-xcor random-ycor ]" d, f3 _$ ]0 \9 m6 v* P
end( O( C" ?1 U. w" a- y$ y
to eat-grass3 r, V$ W0 e; q7 u( `6 t, F
ask turtles [
+ ]. Y; l9 V- \+ ~2 x' i0 m ~* u( } if pcolor = green [
0 ]( H8 {1 U p$ G& y+ o: { set pcolor black/ ]3 a9 Q `: T( e
set energy (energy + 10)
3 B0 Z. n. J4 x v$ c( u ]
0 T& K/ r! p9 B# ] ifelse show-energy?
' [" e, H1 h* ~ [ set label energy ]% B8 x5 }+ E& X4 t# I/ }$ ~
[ set label "" ]
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end
J) e; U x/ s4 R, vto reproduce
% r# U. S' M+ B$ u0 H7 V# O/ e ask turtles [
, Y2 H& F6 O7 } if energy > 50 [4 J0 q1 b% @+ M
set energy energy - 50
$ S* l1 P" Z* O t, k hatch 1 [ set energy 50 ]+ U3 z# W5 H0 i& K9 ~% J1 s
] R7 \! a9 M0 e' G3 I
]
: ?# d; j/ v1 A1 Bend
7 S! V& w4 W$ ~2 Gto check-death2 b6 U' x( s. V3 X
ask turtles [1 [: x( k! N# V& `' `0 i4 O `
if energy <= 0 [ die ]
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end* b* F' H9 f. O1 w& l
to regrow-grass ]: A( w7 E* N8 D3 \& {
ask patches [
, {0 E' s3 z2 {% ?! \: T" A if random 100 < 3 [ set pcolor green ]
4 O m5 P& |- m [ ]$ d! S6 P& E. ^! Z( b
end
* P* v q+ S9 e: X% cto do-plots
E4 B/ b0 V6 y. a0 u0 F0 [ set-current-plot "Totals"# Q# V; H1 x$ v# C
set-current-plot-pen "turtles"
) ]7 h$ `# Y( y- U4 u1 x- W plot count turtles, Q" O9 Z" @2 m' `' [/ b* ^2 r
set-current-plot-pen "grass"' r2 G& c9 m0 c1 u$ j% K
plot count patches with [pcolor = green]2 }4 g6 f# s& ^# c8 U1 ^
end3 Z) @1 w, Y c- R" W) d
可是运行时提示no such plot: "Totals"
6 c e3 l, X( C9 E! Cerror while observer running SET-CURRENT-PLOT
2 X- Q6 b8 p2 C! T) [2 }" ~ called by procedure DO-PLOTS |; x4 j/ v6 f0 ]" t% m
called by procedure SETUP
, q7 q. {! x' S2 D called by 按钮 'setup'
) Y0 i4 a& x) A8 H0 ^# m+ C求大神解答啊 |