我编的程序如下turtles-own [energy]
3 ~6 Y5 E ?% z3 d* C2 Qto setup
) P4 R* G R; U5 p# W clear-all& N9 D9 E6 |! U$ V; c [& e
setup-patches- N2 Y! v( K4 P T, u
create-turtles 100
6 Q+ X3 b7 s4 s) r, ?; Z( e do-plots
% @. H) H8 Z) m2 ~# \; ? ask turtles [ setxy random-xcor random-ycor ]+ z/ T* ?8 r. V: g ~; z- ?6 e
end
6 g( E6 T& p% e; x/ m Mto go* W. Y$ X3 t& m% s* D
move-turtles7 |& h2 a3 ?% {4 I
eat-grass! n$ N$ q! W6 i# e/ G2 [7 P
reproduce+ R& L! o1 K& ^! V( n: _
check-death0 H0 X' I/ N# E+ }
regrow-grass
' m3 ~6 V9 A$ R* I' F7 z: N do-plots
$ K) c$ V' W4 w2 Fend0 Y' W) ^' h ~# _* \' H3 e/ }4 O
to move-turtles
7 z5 [6 U3 d, ]5 F; F8 i ask turtles [
* N9 p2 m) Z: |, w* u p1 L right random 360
; Z) ]0 b8 R, T0 t8 J$ T forward 1
" ?4 ]4 Y4 D- I7 ? set energy energy - 1. Y G" a# n* p. U! V
]! d t- C. t+ Z8 r9 `
end2 v/ n1 C" c8 A
to setup-patches
( b% G+ T' u, F: |2 d" ~/ g ask patches [ set pcolor green ]
& U2 N: }( b' _* l/ F: send7 V" p B5 X- H/ M4 K3 g" D* O
to setup-turtles, [- S$ c1 B" x# J1 x
create-turtles 100" [/ F5 _% e0 C2 B8 k. ~- [& T
ask turtles [ setxy random-xcor random-ycor ]% M- B' s7 G$ [, \! ^0 D
end( ^* c- U% E% a! ?. J
to eat-grass9 M( S" ^5 v- U1 m
ask turtles [
! @& F) P6 _) i7 z- f$ j+ a6 w if pcolor = green [9 ^0 d( k) `' N( W/ v- ]! d E' Y
set pcolor black
0 v/ }' M% P3 h0 o set energy (energy + 10)/ x$ S( l; H/ m! x$ r" ]
]
- |- ^( ?+ B4 @ ifelse show-energy?3 _1 C- G& h- [0 z' u" }" P% [! v
[ set label energy ]
7 e# h" k; h# [6 W% T [ set label "" ]6 W" N' A7 u' x- O& K j
]6 r' P$ Z* x1 a3 i; H
end
; L* D/ u: |- o4 l% u& Nto reproduce* q) K9 o- Y% H( b% u
ask turtles [6 ?) o6 T* g0 h, o
if energy > 50 [0 N1 }# f3 k4 x2 h: D" c
set energy energy - 50
+ m. ?6 m3 P4 { hatch 1 [ set energy 50 ]
3 W4 z! A9 _7 R2 q. R4 r ]" R- |5 @* D* ?' x/ q
]( R1 y* F3 V6 B3 ~4 @& e* x; G! Z
end+ ?- I0 W' G/ `# E" b
to check-death8 v+ |" t+ @9 P9 ~7 s9 E
ask turtles [& N- s5 R4 d: \0 D& ^! Y
if energy <= 0 [ die ]
6 I0 N I% l0 e ]
0 K& W0 z( ^$ ?end
! }! t6 w7 s7 sto regrow-grass
( r7 M' W( S6 s# \9 s ask patches [. _5 O m: b! U0 Y
if random 100 < 3 [ set pcolor green ]
/ X2 `* I' {; f7 T8 I7 q ]6 B7 x8 ^) }) q. u: Q8 }8 l
end6 T! Y* S0 r- H
to do-plots+ o2 E& S3 b$ F J
set-current-plot "Totals"/ J! t( W' A, o& {) p+ t
set-current-plot-pen "turtles", U+ h$ ]7 \3 c8 H$ U
plot count turtles
! h, F! C: I5 e# T8 E set-current-plot-pen "grass"
& i, q- r" n4 r7 b3 m: u/ T plot count patches with [pcolor = green]
- g1 p( P# C: ~* X( i! rend
3 V* h- w/ b" n+ Z可是运行时提示no such plot: "Totals"
% b0 F t) m, }9 Q% verror while observer running SET-CURRENT-PLOT
4 f7 W5 K+ E$ y9 E8 X7 s. u called by procedure DO-PLOTS8 p+ o4 ?/ Z( e* k! q1 Y
called by procedure SETUP
& [$ W b: W. ] called by 按钮 'setup'
; [3 I! e, a4 B A7 q# o1 x求大神解答啊 |