我编的程序如下turtles-own [energy]1 r" ?. ~' V& `7 F+ ^$ s2 n$ ?
to setup
( P0 ^$ e3 S" }+ y clear-all
9 r" b0 S; t4 g3 c setup-patches
0 R$ t T, d; W7 P create-turtles 1002 J, u/ @6 d4 z8 S6 e" y
do-plots3 _ d H+ Z% P- Z
ask turtles [ setxy random-xcor random-ycor ]
$ e4 ]# f. o' r8 L' a' D3 } fend
[% k* |: @ E: _2 K. u8 `" lto go
4 x; K9 t* u; Q9 ~- L move-turtles
) ~! o$ U; W1 W eat-grass% q3 z2 b4 N. ^' ?& Y+ _8 [$ {
reproduce% @& ^0 u, C# v
check-death/ ]/ z+ X) n* ^7 v) L" y
regrow-grass/ l* L% E) ^- ^6 `. |6 T- N1 M
do-plots
3 \( B$ T* e/ m8 xend- S2 i' M! F( \6 h. ]/ p9 Z' y
to move-turtles: x7 G% {. ~1 p. @6 \
ask turtles [1 ?8 P' {* b' [5 x) E# T1 o
right random 360
( J6 S6 v, e- h5 }. m forward 17 I3 c! t3 P( t* M# e/ u1 {+ g
set energy energy - 1& L1 f6 x' t; u# @# p& J
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end
5 G. K g0 V! {# ?$ W" bto setup-patches
i( ~4 v& N# Z6 K ask patches [ set pcolor green ]
( |7 _' P- P9 H5 S4 X& a% K. Jend2 n: _* H/ F$ y9 `" t/ r
to setup-turtles4 U2 s% X' f8 s# s9 ?9 l8 U
create-turtles 100 m8 f1 M- O$ q& K1 a
ask turtles [ setxy random-xcor random-ycor ]; g; C( w4 {- ^% J
end
6 s7 \1 l8 @) m+ p( t. W, Xto eat-grass
) }5 i) X: M6 c. b, `* F ask turtles [% t. P# o" b( I$ {0 S- ^) a! Q
if pcolor = green [
* Q. L1 ~" s' U, D$ x" r7 w set pcolor black
( q1 Q/ m+ E" T; e; Q9 E" |" P set energy (energy + 10)
1 D$ J5 w0 |$ ]( f ]
- b& Z3 j& C& ?8 D2 N! @" o ifelse show-energy?
$ y4 h5 O1 X$ D/ K& j [ set label energy ]
9 i8 r: a/ o7 c: T, h5 h$ w" J [ set label "" ]
; e P; B w5 f ], Q. U" D( a2 F8 O* ^+ [
end% h# D' {# o* P5 L; o* P
to reproduce
3 S( U- p' m; t! G3 y ask turtles [
3 z9 t( E; K" s if energy > 50 [! d5 Z4 ~/ s- w# P- O$ N
set energy energy - 50* ]1 r/ W1 H+ Z$ J% t G" S7 F
hatch 1 [ set energy 50 ] k+ j3 e, L E% ~% C- h8 z9 U: U
]
7 F6 B8 w9 n# q# b ]
C6 ?) \, e) _! Q5 Y7 nend+ n( h- G) @" ]0 l) Z! {
to check-death
1 _- |( W/ B8 q! J, e0 K8 |" p ask turtles [
" [! D. {8 X0 c2 }+ v if energy <= 0 [ die ]
, w! ]: H* Q6 ]8 ?" M ]
; x% k4 Y! O% w/ r, U. l8 Y6 E6 Hend( p, J) I! z% u! k1 O: I5 q
to regrow-grass
" o- C1 ?' G! {/ _2 P ask patches [2 j5 B; W0 d5 X" W; w2 a
if random 100 < 3 [ set pcolor green ]3 W# }$ L5 h; N* z0 u
]1 _9 |+ i" J- C- e. y& j
end7 r" T6 K1 k, y |# s
to do-plots" F2 G) o& ]7 H$ r2 n3 @; F
set-current-plot "Totals"
7 b+ l1 t2 l8 u- B; h set-current-plot-pen "turtles"* ]" Q0 t: h5 }5 b
plot count turtles
% n1 W5 ~' Y& ?4 D$ B: R# L% J set-current-plot-pen "grass"
# C9 e% a, i+ y q& ] plot count patches with [pcolor = green]
+ v7 W2 a: Q2 |$ N+ n# yend
+ `# M# s7 S4 V3 x9 ~: {可是运行时提示no such plot: "Totals"% u8 v9 R& ?0 @. p2 h% [
error while observer running SET-CURRENT-PLOT
& ? k/ ?; f k7 a called by procedure DO-PLOTS7 P# h" A3 x, C
called by procedure SETUP4 p! S+ Q6 k: p3 r( `' P
called by 按钮 'setup'2 `9 q u. J0 q' N' p0 p5 v* a
求大神解答啊 |