我编的程序如下turtles-own [energy]
' i: Z% J N# X% f$ kto setup Q L& f- q) z3 j0 U2 _
clear-all
9 C5 g7 b0 D4 J" l" a; j( T setup-patches
2 F, B- i# Z0 B! R create-turtles 1000 [5 d: t. D1 Z! d0 b& @% M4 \
do-plots
+ E0 a1 ?7 d$ x P: L. x3 L$ @ ask turtles [ setxy random-xcor random-ycor ]! s; ^1 r% B/ T. y9 R7 I
end
+ d& z o/ m3 L5 W6 \to go8 `% }# L3 P8 k+ s3 G' q
move-turtles5 m9 k. ~( T7 X! _5 @- M5 b
eat-grass5 v- _8 }' x/ P" n+ `2 O2 e* Q- c8 Z$ r
reproduce/ d6 n1 {4 a5 O6 T9 M
check-death& x! m5 Y! I- X$ m' m
regrow-grass
2 P x, T* W8 h7 e) m do-plots
: Y) K# h0 M0 q+ Lend
! a# H d' E* k- ]# H' j! p% cto move-turtles6 W' _% }8 X6 H2 b: M! C& I
ask turtles [% J l' O7 r [) \3 p5 A
right random 360& Q7 N4 b+ r/ W' J
forward 1
) e0 i( q5 E! \. _8 _# @9 _ set energy energy - 1. G/ D B$ L1 _2 F8 D
]
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to setup-patches
0 b/ J4 s# I- h& V; z- d6 o& \( n$ Y ask patches [ set pcolor green ]
- b, i0 m R' R$ o' C$ Rend4 V% w& q T6 a* n
to setup-turtles4 Z- V( \7 H6 l5 A4 \
create-turtles 100
; y" z; |- A) H% Y+ Z% H6 \ ask turtles [ setxy random-xcor random-ycor ]9 `7 M Y6 v* ] E" S( z% `0 y6 E
end: l5 k" s( {% K9 R5 m
to eat-grass
$ ~1 `- O* B+ E& |/ L' { ask turtles [
8 T& M* l' n7 @! U; ^ if pcolor = green [1 a5 N8 I. m4 b1 d+ d0 s" Z! ?
set pcolor black+ c( p* Y( A' Z, y+ C
set energy (energy + 10)0 m, {9 o$ ]) `7 B& i: }8 {: R% I
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ifelse show-energy?
5 B: ^( g; T* J5 u1 R0 t" P [ set label energy ]
$ `6 }0 O: P, a% F [ set label "" ]
# E4 c! C" R; }& I0 p ]
9 E( ~; E. K( A% c4 uend
7 ]9 z" {$ a/ }3 Q5 u! Wto reproduce1 e1 m9 \2 c& G# [1 @1 W
ask turtles [; |) n* B, m* o; b2 ]% g
if energy > 50 [
/ y- A$ q+ r0 W8 V6 a6 K7 e set energy energy - 50/ T* ^ L& @9 ~$ D& L. u9 y
hatch 1 [ set energy 50 ]
+ g9 k# L9 _/ [, G ] i# [, w( c# \
]
! z4 _1 }8 o5 K3 @end7 Z& h) M$ b! p, c5 v! V
to check-death
3 `1 ^ a" G0 X& g `6 E8 n" W7 {, h ask turtles [
( D7 w+ b7 ]' q; D1 o if energy <= 0 [ die ]
# U+ \( B2 ?' q e) S ]& \- W" T" m5 d+ t6 K
end" c. B7 a- ^8 U% \
to regrow-grass% W# L, L& n( z9 f5 s2 ^0 [- T
ask patches [. n8 O( r/ b+ n% Y& u
if random 100 < 3 [ set pcolor green ]4 P' c7 F1 l- g; Y
]
& y& n5 }9 W0 h6 U! `$ m) }1 O( ~. U& lend6 w! @. p; o1 p$ Q$ f& y
to do-plots5 n9 O! f b9 Y! u; P' ?0 e7 [9 o6 @
set-current-plot "Totals"
@2 p: f% D- ] set-current-plot-pen "turtles"
+ N6 L8 U6 r; m2 t, M) K* l plot count turtles
; d* w. X* G: I, d6 B" J set-current-plot-pen "grass"
& e# l G1 Y. D$ R& I plot count patches with [pcolor = green]7 a1 m/ r( E3 N1 J! K
end
$ G1 }8 r1 U6 t2 ], v4 N ~ p( {1 ^可是运行时提示no such plot: "Totals"
6 D' k: T. l1 S; ] R; ~8 N. Nerror while observer running SET-CURRENT-PLOT5 N0 }1 K2 ^! j
called by procedure DO-PLOTS9 v9 ]& q4 f4 @* h0 \# ]( s- n
called by procedure SETUP. G1 p2 }5 u6 N5 j9 |" x# f1 I
called by 按钮 'setup'
5 z" G% w* c/ a& J/ z# R' u% g" b求大神解答啊 |