我编的程序如下turtles-own [energy]! W: E; O5 Z6 q0 d
to setup3 ^, N G) ]! N
clear-all
. E5 b3 s( K. |5 d# n setup-patches* V6 T: @" g! J! W- p/ `
create-turtles 100" b3 @& _0 }( F1 y( O4 Y6 }
do-plots
) O7 ~; F% A! I9 i ask turtles [ setxy random-xcor random-ycor ], W' ~5 \& X. q' O4 a1 h. ~
end
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move-turtles, `0 m8 `0 ?/ a3 r4 E9 G; ?
eat-grass
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check-death! T2 }' y" G5 s2 n: S/ h
regrow-grass
- g+ p8 y" S/ k" ~$ g do-plots
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to move-turtles
" v3 O( n+ \9 R# L ask turtles [6 {7 ~5 N5 {6 y) p& W3 |
right random 360/ c3 |' D [4 O( K
forward 15 p7 s! Y- d0 A6 o
set energy energy - 1
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2 m( _+ s& C" n/ y$ zend
. W @1 A& D& Q$ U! yto setup-patches/ N# e; t" V3 U8 }
ask patches [ set pcolor green ]: ^/ m; g* l& `4 ^6 O& b6 G0 ~
end& w2 U: A" M& m+ q
to setup-turtles5 S$ s5 e% O" l4 A
create-turtles 100# s3 l- w9 W5 S! F: Y+ m- _
ask turtles [ setxy random-xcor random-ycor ]- I5 S2 l( ?+ E: W& c* e5 g
end C9 M' ^8 n9 \: X; ~, O2 |: W
to eat-grass
% y' D8 u) |3 r! M& f7 D ask turtles [" ]8 {: o5 a! [8 ^9 ^9 y6 J0 K' B" q! Q
if pcolor = green [3 @8 G* ~7 @) ~' H! d
set pcolor black* _& M2 t3 z1 N. Z: X- T
set energy (energy + 10)4 n. A, ?# C% T* \; c
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ifelse show-energy?
7 q0 I$ L+ m3 r [ set label energy ]3 U, n* x2 ^9 e. ^
[ set label "" ]
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end8 A' ], _* z( U5 ^% @3 t/ d
to reproduce: h0 }+ _4 p' {, x5 i9 v' U
ask turtles [* J( D9 Y; B; Z. ~+ m1 g: Y
if energy > 50 [2 o1 C1 D# r+ x% \1 x
set energy energy - 50
8 j5 \3 h* I( w; |' i# D7 c hatch 1 [ set energy 50 ]0 Z0 A6 n$ [* h! ?
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end" j7 b& l% ?1 a1 f
to check-death
# X5 J. m. j& c7 w6 M ask turtles [
8 S3 o+ b1 G% ?+ K$ L# W8 H if energy <= 0 [ die ]; f2 D* ]9 { S& H* t, v; ?
]
9 ^6 o( j& k6 W, zend
9 C# I4 c4 v9 d: S' }to regrow-grass
, J! T2 f2 Y6 j! A9 p ask patches [; x' o( b* `7 u4 o$ G. I3 w
if random 100 < 3 [ set pcolor green ]5 g, g0 M8 K; k# Z
]
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to do-plots6 X& [1 j9 M' R4 y: d
set-current-plot "Totals") y- e$ q+ i G& }. R
set-current-plot-pen "turtles"
" w* f6 F- l! M6 ~ plot count turtles
" r1 Z( E2 F% n( i1 @, \% Z set-current-plot-pen "grass"2 b0 c/ F2 E8 X, T; N
plot count patches with [pcolor = green]
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可是运行时提示no such plot: "Totals"
: k/ q: A) N2 J3 Serror while observer running SET-CURRENT-PLOT& `1 @ X: T/ m: }* ?
called by procedure DO-PLOTS
! M& V9 C* Q p3 Y% j$ n called by procedure SETUP3 w+ L/ E }' H# U
called by 按钮 'setup'
8 n0 b1 R9 L& L/ [! U3 L3 X9 z求大神解答啊 |