我编的程序如下turtles-own [energy]. w- ~8 w+ ~9 _% Y/ u8 w
to setup. Z$ ^: i- ~+ C5 L2 J0 m* P
clear-all
! b" G0 ?# J2 ~: T& l$ z% F setup-patches6 U+ r' H% L' t# j, j
create-turtles 100
% x/ s' T& R% m% Q do-plots
& P& o) B, ~! V0 d: Y3 B/ D ask turtles [ setxy random-xcor random-ycor ]
- \ W7 E% }' kend0 O4 U3 F! a& C! a) u/ h
to go
9 k+ R1 P/ | o5 @1 h7 r/ H# Y move-turtles8 x {1 ~. c& |. \7 ?
eat-grass
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check-death
1 ]8 V2 \) W0 D% | regrow-grass
% z! i+ g c9 y" ~' G* M do-plots
& r/ t3 c# }% e- T Fend3 d3 D/ Z5 d$ M2 Z
to move-turtles4 P7 o, g/ o3 {
ask turtles [( M1 Y% {: J0 E) c: ]) w
right random 360
- ~/ X. e) R m: W. ~ forward 1
) P- D( [1 r8 G+ j" ^: y set energy energy - 1, n4 X& d0 z7 R- ~) _. U2 m8 B$ O# s
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end
+ o" j6 o! r% j/ t3 ^to setup-patches
2 s5 r& @# t4 X, ] ask patches [ set pcolor green ]& T! b9 m k7 ]- b
end6 s, U0 p0 c* h6 A, ]( }0 C
to setup-turtles
+ \1 ~, d3 [. C! v; [5 Q E9 ? create-turtles 100
! P% e/ _" r1 {7 D ask turtles [ setxy random-xcor random-ycor ]. L1 [- |& M- P
end6 T8 T+ S# o7 `! M+ X4 s
to eat-grass
! R* _% f5 O' G/ u" G ask turtles [7 ^/ W1 ] q8 z0 c. e7 X
if pcolor = green [6 H. h- x/ ?& P1 V. [2 h
set pcolor black: Y3 C# ~ x% a" }
set energy (energy + 10). l) E. y" s! E
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ifelse show-energy?% L( \; H$ w# ]
[ set label energy ]9 d$ t4 E7 Z4 C5 P# p8 n4 r
[ set label "" ]
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: H, z6 r) s1 B8 B7 g: I+ |end. `8 M' @; o6 H( k( a
to reproduce
1 b* x D q* {/ f) K ask turtles [) i, M- e1 L; u+ Z& F+ G' Q3 V
if energy > 50 [4 I9 a" H+ @5 p* e4 z8 U
set energy energy - 50
* F" m. S( a. y. u# D( }8 p hatch 1 [ set energy 50 ]9 w1 S- O3 W% D+ i. k7 r
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end$ m& E5 Z3 n# b5 }% m* G" r
to check-death: u+ g' `1 v' V/ k
ask turtles [9 P8 N( k& @* P% ?/ f2 F
if energy <= 0 [ die ]
+ p8 K" _% c* I# I' x% l ]
+ _. [2 X: D2 X* }* o* Qend! v: M2 P t. c8 w* _( \/ e
to regrow-grass
! n# m; q' h) L5 m- [6 D) _ ask patches [7 F* P+ }4 i1 n M. z
if random 100 < 3 [ set pcolor green ]
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end) w* y3 \& W- \' f
to do-plots7 F7 y4 f0 o4 H5 ?2 @7 s9 Z% ^8 z& b
set-current-plot "Totals"
( ^3 I* P5 ? E4 C1 q# J set-current-plot-pen "turtles"
& C6 V6 K, g' y' M& F) }2 M" F- M plot count turtles6 j6 ?: k f- h/ n! O8 I
set-current-plot-pen "grass"; T. A9 \! T+ o
plot count patches with [pcolor = green]
6 h$ ]" ~5 S5 [1 L2 Lend
; e, o% ?# M* Y+ D& Q+ X4 N可是运行时提示no such plot: "Totals"- e$ H9 a! t" i) \
error while observer running SET-CURRENT-PLOT; d( K0 c+ @1 [$ Q2 U
called by procedure DO-PLOTS
+ a3 c7 A% Q/ h! X$ d4 f7 t called by procedure SETUP2 c" L5 h* ^2 c( N
called by 按钮 'setup'5 f7 ]: x u5 z7 d0 O( {
求大神解答啊 |