我编的程序如下turtles-own [energy]0 b4 O# j2 V( B+ { G
to setup
& D3 D V h# ?9 ]$ H clear-all: p7 B) U; J9 o, V: x1 J! m
setup-patches8 x" s) h; M- X4 V9 m# g
create-turtles 100
7 x4 p% }8 s' Z3 G$ d/ E do-plots$ x6 e8 y6 |: ]* |7 O( w1 g
ask turtles [ setxy random-xcor random-ycor ]6 e8 t5 @2 j7 ^& C& L
end
6 K q0 k( q) ?5 L$ c) nto go
& {3 q d. H, V2 B8 D. {) u2 R move-turtles
+ f3 T1 e& ~. i" o7 k3 g+ x eat-grass# w7 |" T3 ~ W3 E- j
reproduce* t- l3 U( \$ r
check-death
5 @2 _, P* e' x, k* W regrow-grass2 x, q: x) C1 R6 {: W, W- R7 I
do-plots
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# ?: p1 H1 A3 u# G) }to move-turtles
9 v. b( V: z( g9 \3 y ask turtles [
* K) K$ U T2 ]7 E" D right random 360
% o: p7 q, f1 }! P4 k2 q( b% a forward 1! |' n9 M- v0 }; T h& a
set energy energy - 1( t+ A- L% p1 m' ?' y6 `
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end! s7 b0 f0 K& |6 E, W2 `! t
to setup-patches
1 F- k r3 }- {3 h r ask patches [ set pcolor green ]
& `7 o% k! H9 \* p \) fend
9 a' o6 O, ]" J. c! q- f( Wto setup-turtles0 ^: i. [5 b- j( e
create-turtles 100/ o+ t( B/ o( O! Q( x
ask turtles [ setxy random-xcor random-ycor ]" @/ a/ T0 R3 S! A
end
1 e O4 c: z0 c) ^: Eto eat-grass
4 f+ h$ G7 j6 C6 |4 n9 \% d9 O ask turtles [ C" H2 k$ I4 m# r
if pcolor = green [
, `, s8 |' R6 V R+ C7 d/ d v! | set pcolor black
! m! Q c9 K8 i set energy (energy + 10)" [3 f; A z* ?$ c/ ~; l
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ifelse show-energy?1 d+ q! \+ x9 T$ G1 d' \+ R
[ set label energy ]
0 ?/ B5 l* V# D S. a! N7 H [ set label "" ]2 k* s! f# l8 b
]3 d0 \3 g8 K8 c) [/ I! k
end% {$ S0 ]2 a5 F! r
to reproduce% t( L% D' M: V6 Z
ask turtles [7 a8 x& E$ r1 R7 F3 b
if energy > 50 [3 D$ i! X8 ]; g$ P/ w6 |- f
set energy energy - 50' ^* l8 Y+ p6 D
hatch 1 [ set energy 50 ]
/ ~( t1 F5 ]: L ]
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end, _! |8 F, B% q! t- L! _4 q
to check-death& M" y2 T; X, q% l1 t8 j F
ask turtles [0 ?; R6 l0 ~6 t, P9 o7 j/ F
if energy <= 0 [ die ]
( K: {( ~) h' Y {& D5 [ ]) B7 \) g2 o8 `# b8 I* h' J/ p
end% R' s5 z, s% [0 p$ T9 E- i2 i
to regrow-grass
1 C; C( L7 J" @3 p& C- L# H4 a) G ask patches [% V- N" {0 m8 F; t
if random 100 < 3 [ set pcolor green ]
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end
' ` s5 R4 i' |+ [! D# |to do-plots
% V" X0 h( u# N2 F set-current-plot "Totals", m$ @& z' q- j8 Q% y e4 j
set-current-plot-pen "turtles"6 r$ ~9 P6 i( Q: o# y
plot count turtles
2 z9 h7 v5 U( x7 c$ b set-current-plot-pen "grass"2 ^% A N0 m5 m/ a
plot count patches with [pcolor = green]
! {2 n: J4 W; q+ Hend
! p+ u5 E3 {& C% l可是运行时提示no such plot: "Totals"
6 ~/ u8 U& k1 z% R3 N" merror while observer running SET-CURRENT-PLOT. |' \& c5 G3 j; ^) [
called by procedure DO-PLOTS
' F8 O4 u. K6 D0 v0 A2 c# ]$ j called by procedure SETUP! c* d4 s) }) l: L; W
called by 按钮 'setup'
4 x3 C. S, z: ]) K- y3 h* l% R; z求大神解答啊 |