我编的程序如下turtles-own [energy]7 A. [4 l; A: p o3 ~! e5 u0 h
to setup$ a. N' D3 V. O/ [# k
clear-all
' n4 w/ n2 o. D' @: z$ u setup-patches
; j- B: s6 @$ A. U6 l+ w& c3 D create-turtles 100
. d0 T1 g7 h5 B9 S' m9 o: x2 y do-plots. d, V; u7 u: `* w
ask turtles [ setxy random-xcor random-ycor ]
, q: l) m& |# m% [2 S; L2 Bend
3 t# O* T, Q# Y% oto go! D0 V! S' q( X! |5 ?- d
move-turtles/ P ?7 z: p6 ~" S1 g
eat-grass
) i! i" n- X+ H8 x5 W; Q reproduce
1 F8 a3 E+ b4 R6 `+ s3 W' I check-death) C- [2 k- Z- w* B; S+ V
regrow-grass# x+ j& Z' t2 Y
do-plots
. E j; b* I( c# Xend* q' R) R$ W$ v$ ]. ~
to move-turtles
q1 D8 I% s3 A, Z' M" L6 W ask turtles [/ h# L, \* Z1 Q5 x$ J# a
right random 360
, w q% N9 k( `% q) e forward 1
" E( O) O( l" K/ i$ P1 G set energy energy - 1
; G# E1 n* n) g E3 G, a8 | ]8 \" k& _- e) d% L: _
end0 v( `( S! U& ^$ W
to setup-patches
+ s' z! f$ s! Z6 | ask patches [ set pcolor green ]. m2 t( V) `- p/ W7 Y
end% ~9 h+ Q; M* Y0 H0 m( G, V
to setup-turtles
+ h, z. v/ ~4 } create-turtles 1003 c$ _3 p' k" D/ s# n
ask turtles [ setxy random-xcor random-ycor ]
/ q: B: f, J e) A1 E# ]9 q% q* zend/ ?# `# E9 O6 z- T
to eat-grass! [5 b' d! `# n$ ^
ask turtles [$ I. r) H2 I( A8 B
if pcolor = green [
+ d4 E$ H' [. z$ f/ [ set pcolor black
7 S) r3 `9 F% B( H" h/ \% W- T set energy (energy + 10)
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ifelse show-energy?6 I v; Q( Q: X9 S' U
[ set label energy ]
1 k/ ~( K# x: b8 e [ set label "" ]
+ x( F; ?3 T4 g; r5 D. w ]" b+ F! \6 ~1 W, j. `1 r
end
$ y ?: @8 ^. K4 xto reproduce
+ d3 i3 h/ S# ] ask turtles [( @! H8 K L' n% \$ K
if energy > 50 [
8 Q9 T7 n8 G1 G$ A' C set energy energy - 504 j( O4 Y V0 W
hatch 1 [ set energy 50 ]! L( ]4 |7 z0 c% D3 x
]
7 ~$ O& U! [- a9 }: l ]
% s; j8 ~. F' o$ B9 ~9 {end
9 ?5 y) I8 G" F* Y$ Sto check-death" |2 z; y/ `0 a7 N' \* F) t5 m
ask turtles [- j9 k& x) x8 t2 W
if energy <= 0 [ die ]" o( a& o1 V0 |8 R. n: b" t
]8 I/ }7 p7 S' a
end0 a% J3 B, o) ^; u1 x; Z3 z
to regrow-grass
- J* ], E$ H" `3 M- W5 U ask patches [
) Z/ G, |) M8 s! |* r! S X/ A if random 100 < 3 [ set pcolor green ]! h7 s1 B K# _4 T7 c' K
]& ~& V) @" ]& j- ~" f
end
% ~) P/ E# l8 C( m* xto do-plots
. F: U3 L/ O8 b2 `* [/ Q! b set-current-plot "Totals"
9 \3 x8 b W: {% v$ j8 | set-current-plot-pen "turtles"* |; K" R$ j5 [, [: T. T6 _- n8 d
plot count turtles
; O9 Q, \/ A! b: T% h8 q) L* n set-current-plot-pen "grass"
+ |+ Q" b4 i9 D6 m/ j4 l7 S plot count patches with [pcolor = green]% }; I. U' U1 R. P3 ?
end0 h' R* h* i& t( A; x
可是运行时提示no such plot: "Totals") u& s) L* |- c# j, [( b* F: I
error while observer running SET-CURRENT-PLOT, S. i/ o$ w( u! t- A. ^
called by procedure DO-PLOTS
3 t9 M7 z6 q1 F/ v called by procedure SETUP9 D* [! W7 g. x
called by 按钮 'setup'% P9 `$ e R0 F9 D b; D
求大神解答啊 |