我编的程序如下turtles-own [energy]
9 O: X1 ?/ f n( ~/ x( W% Cto setup+ f1 k. g8 ^; A$ e
clear-all
}' v- ~$ k) u9 E# p setup-patches
9 U8 n F# x( L2 k ^ d2 x/ q$ u/ E create-turtles 100
5 a& K; m. y' T: M) d" Q7 [ do-plots
; M7 U" g0 Y- S4 s j" } ask turtles [ setxy random-xcor random-ycor ]" a) L$ ]% g7 e) ?5 J
end
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move-turtles
2 [$ x; u8 u$ N; C eat-grass
0 J$ t1 x! `/ j' O5 e- @ reproduce
& z0 O8 d. i+ }6 d d check-death
* t: S- H: v! \( D, z+ k% E! a regrow-grass
- W( U; [' B+ B) y) M `' _& n do-plots
, [/ f5 w) ^' J- h$ R5 Eend" w) y" h& R$ j3 D
to move-turtles$ C% ^$ D: E! N i
ask turtles [
( p: E, c$ z4 g/ v' j- I) r1 [4 a+ ~ right random 3607 S) t# Z% L! d6 J
forward 1
9 [7 {, C% r7 B6 ?6 `0 \/ E" _- E( e! l- Y set energy energy - 19 Y4 ~2 m& V4 A. N7 B
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end% P: i2 g# y A
to setup-patches
, Q5 F# u3 H1 Z* R8 R ask patches [ set pcolor green ]
2 z) E6 W" E9 t% c1 p' f+ {end0 p5 x1 P9 A8 Z7 e
to setup-turtles
, D* R0 N& m7 _0 k" J2 Z4 g create-turtles 1003 J; f& O( C6 A4 |5 e3 }- w' G4 V
ask turtles [ setxy random-xcor random-ycor ]
# P1 G- p$ `. A8 eend6 t8 S8 h `0 M) W
to eat-grass
" u5 _% w. n( n1 Y2 _4 n ask turtles [! v" C; u0 `! `: h4 h1 m8 R
if pcolor = green [8 G/ p+ X+ g) x
set pcolor black* C+ S7 _0 H' W* O E3 I* `- B& V
set energy (energy + 10)
" G- l: V+ S' q$ ]5 n ]
) i# B8 E+ a" S" U& c ifelse show-energy?/ O! Z" o" W' C( q7 J9 w/ i' W7 D' f
[ set label energy ]
) M8 T3 |* y6 ]9 f [ set label "" ]1 [1 ~( d# u* _" k4 N
]
% Z3 T9 `- q; o8 N: nend3 X. k, Y% F0 P3 u ?6 _$ A) C7 s
to reproduce
j K, Z5 |+ ^1 i$ h ask turtles [
! L" P1 j4 }" u, I8 u9 a8 X! { if energy > 50 [9 K% h& R4 s3 f
set energy energy - 502 z: H% e, Y+ l. @
hatch 1 [ set energy 50 ]
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]9 w: c4 P! ?& U7 o
end) l! K- T% u/ `' ~8 Q4 F, i
to check-death
+ K. _" G, \% F9 ?1 a% r9 z# x ask turtles [
2 k7 r& ~. b" F9 ^+ N, l! ` if energy <= 0 [ die ]- x, P( Q; o- h
]
3 }. t; c% b+ ^& e; W* pend) Y1 d1 M. q: F2 W" p9 T. t$ c
to regrow-grass/ d2 S! [. f* D& D: Y$ B( l
ask patches [
( [: d; M0 o' G8 M7 d. C if random 100 < 3 [ set pcolor green ]
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end
2 V$ i5 [6 B p# }& ~$ `to do-plots" `6 J) P# d+ [$ A& T
set-current-plot "Totals"
7 x8 l1 B( y2 Z; a) G7 o set-current-plot-pen "turtles"- u& G1 r. n& O$ U5 M) z
plot count turtles. z, q, J$ G2 J, n2 Y) M
set-current-plot-pen "grass"# c9 C9 a. O9 C3 D* c
plot count patches with [pcolor = green]) Y8 _- `5 r. d1 K9 D: T
end1 h. b" r+ \8 y* G
可是运行时提示no such plot: "Totals"
4 R& L7 a0 \8 \) G8 q' Derror while observer running SET-CURRENT-PLOT
, c. k1 ?$ u& J P called by procedure DO-PLOTS
7 d' _" _. Y$ L: h' S- z. X called by procedure SETUP3 P( `% w2 E: i" Q) J! E
called by 按钮 'setup' x& x( R1 c0 x
求大神解答啊 |