我编的程序如下turtles-own [energy]7 ^; J7 }8 _) k: [3 G5 C9 ?* @! @
to setup9 Z# ^. N J, Y5 E& t! |* O7 Z
clear-all0 Q# G$ c4 I6 O" S/ P/ ~2 a
setup-patches! Y W c; ^" @5 A* G6 f- e
create-turtles 100
; i4 p z0 _( a! ^7 g' \/ x do-plots% o2 F- R3 x; V. a+ l6 J
ask turtles [ setxy random-xcor random-ycor ]! ^$ y( C5 S' ^- ?1 o
end8 I" q# u7 p: J: I3 \8 ?
to go
$ d1 [4 ]" Q9 L2 U' P move-turtles! y! g/ s. J9 P! j; B! O9 D
eat-grass; U" L" Q( q$ s$ Q5 R0 X& n
reproduce
4 X" u& }9 t" y- j- T' z( I check-death
: D9 Z" l9 ^# @& Y% R regrow-grass$ |+ {3 J* R4 I& f6 X4 |& l
do-plots
s. B5 ?" r, ?4 gend2 @" @# c5 E# j" E! S
to move-turtles
! b5 P* O" i; i2 i1 {- ^' ^9 R ask turtles [
6 i4 A* J$ A- D: p; A( y* O& f right random 360
7 ] U0 |5 J/ t' I, D8 C1 f/ K% d forward 10 c) Q% o! R) P$ o6 M' b; L
set energy energy - 12 O; y% }3 ^3 |9 _( [: o5 b4 u
]$ I7 G6 ?- h, C4 b
end
# a" r/ O. Y/ B" g5 e }9 Bto setup-patches
" u& ~+ G: K+ A9 M* w9 W ask patches [ set pcolor green ]+ x$ \! I* y6 ~2 d! _) [
end
" Y: N1 k s5 m) S. _2 Pto setup-turtles
& ?! c1 W( X5 I$ S create-turtles 100) W# C) c0 T% H. c! }9 a3 `
ask turtles [ setxy random-xcor random-ycor ]
) S9 f% i P$ V& xend2 }$ s8 G% y) c4 F- C! ~
to eat-grass6 r7 Y; {4 F3 [5 |& n
ask turtles [
4 {1 Z/ g# w* | m& u if pcolor = green [
8 z" W3 `' G% ` D" w set pcolor black" A7 ~4 \+ _9 y4 u6 A; ?9 q
set energy (energy + 10)1 ~# E+ f1 a$ O. j' U- |
]
* ]8 g, y- c6 y+ P# [ ifelse show-energy?
2 E; N. s. Y' \% m( {, U. S [ set label energy ]
, d6 ~7 I" ?+ {* C7 _$ L- z [ set label "" ]
% C% }3 n- T% } ]
0 s& S: x4 y5 x! q% |5 _end5 g( Z# C( m+ F% b4 v# y* [6 O* y
to reproduce+ i W( U* D1 G# ^
ask turtles [1 i# D, P7 @8 l
if energy > 50 [# a% ^6 k$ }9 h% }/ u2 O
set energy energy - 50
* {3 k7 T' N! [ hatch 1 [ set energy 50 ]- U& e8 c+ l) `2 i! A! b
]
' D, m9 Q& A* ?) l' F ]
1 t y* c. Q9 M, o1 F+ f& lend
7 g w9 X/ w: F# _2 X8 Fto check-death
! I3 M& r l: o% Z6 G1 G! {+ v ask turtles [
# b m9 x1 @- a/ g" y( ]3 E: |4 q if energy <= 0 [ die ]2 a- h6 p9 _1 }4 O- p; f
]/ G- T' O! U2 K+ f6 \& g5 U
end( `3 I# {; d) e+ S4 K& i# @9 M- H( W
to regrow-grass( H; R# [6 T& I) b0 s5 L% K
ask patches [8 y9 u" S: T/ n! `7 }* h
if random 100 < 3 [ set pcolor green ]2 V E% P0 o/ U8 A- v
]
" G7 Z8 ]) v+ f! n2 Z yend, I0 }# O4 [3 U1 N, Q7 M
to do-plots. C" h! y* {# c( J% x* w/ d
set-current-plot "Totals"$ O& U3 s. T5 r' `
set-current-plot-pen "turtles") @& z4 W% F9 w2 T
plot count turtles
* u' \* u' b4 v set-current-plot-pen "grass"
5 E5 k. j1 s7 a( L plot count patches with [pcolor = green]
3 t, K5 ?8 P1 q# @) X* \end: e& v3 ?! M% s- T' [1 r
可是运行时提示no such plot: "Totals"" f: \' Y: H5 B6 U
error while observer running SET-CURRENT-PLOT8 C( o q+ X& V" Z& F& x& c
called by procedure DO-PLOTS1 e( R8 \( I0 f8 l/ D, ~& E
called by procedure SETUP& q, U& z- [3 f, J G
called by 按钮 'setup'3 z9 q: F- g$ ^7 b- e6 e, l
求大神解答啊 |