我编的程序如下turtles-own [energy]
; O1 Y. h" X" G- ato setup
, a0 U$ @' p" [4 A1 |/ a clear-all+ C" p. [# q" |0 _
setup-patches% ?* l5 H( n! R. ^- o. l
create-turtles 100" N' a. `% R: `
do-plots
1 X$ |1 b; N: n- L ask turtles [ setxy random-xcor random-ycor ]
" v0 C1 m6 t1 x h$ |end
* J1 m2 J: E, i& y* Kto go" B; \. L3 {8 j/ v! p9 v2 T- t. q
move-turtles! M+ m3 S- n& J c; n
eat-grass5 z$ c7 Y z( }; u* ~- ^5 S
reproduce
/ P1 p& Q. D9 e& M" Y check-death4 T. w0 o: S p& L: I: {
regrow-grass* w" m5 v8 \( q6 k, _
do-plots
. d, C% A) d$ m: g# @/ hend' H( V- {' m! Y: M* ?" W/ W
to move-turtles
# S5 L* ~, m0 l2 M) A B! O O ask turtles [5 h# M$ I5 S2 |$ O- a8 u1 N! ?# ]; z
right random 360/ |" \, m) D$ w5 B1 ~
forward 1( O9 r1 {3 O% z
set energy energy - 1' m" R5 G- C0 t; G6 k6 K7 G
]
. Y( l9 e( g% ?: G1 nend& s/ B! A* G# N1 A: h7 ~+ f4 ?
to setup-patches
$ I3 [( {) L) B+ o s h( r3 M! K ask patches [ set pcolor green ]" a8 ~# z: {* N5 h9 U
end) C% f: [5 a) y( B$ d \
to setup-turtles
6 }& i/ M$ {- j: j, S create-turtles 100
. c, Q: }8 Q1 l ask turtles [ setxy random-xcor random-ycor ]2 e6 [1 X9 T9 e# U ?/ I) h1 Q6 t0 A
end* \7 m/ f9 w. q. D0 F
to eat-grass6 z' `0 m/ |! X: o' h" W
ask turtles [
( s0 w& O+ Q3 l if pcolor = green [( M) O1 g* w! m2 o2 U9 `6 }
set pcolor black
; j( O3 q) [5 f1 p2 Q set energy (energy + 10)
5 B' j& N( w5 }7 h" @ ]
# k* k7 O9 t7 U' x& [7 [ ifelse show-energy?. P' R- Q, Z$ x* a' E' d
[ set label energy ]/ N: m' h8 G$ X! j; c/ a
[ set label "" ]
: [: b% S1 k8 e9 y( E ]
% n" a7 z C- \3 Gend
7 S4 P( E+ Y% \8 _to reproduce @9 K3 _1 U+ z, q
ask turtles [1 N4 N1 i+ u3 Z+ m3 b& @" U2 N9 t
if energy > 50 [5 J: W) x$ i* t4 `9 a. D
set energy energy - 508 w7 c3 w# x4 ^1 _+ p
hatch 1 [ set energy 50 ]& s3 T0 R" D, Z
]* p1 `( A& @; ?
]
8 Z4 [) D3 l/ l) B5 Y8 { N2 [% `end; C% V% V5 O$ F5 E% m, @
to check-death) Q' x8 [3 w3 _6 \+ H
ask turtles [
* ?9 v, M* [. u if energy <= 0 [ die ]+ E; z" ^ X0 A/ v
]
: a9 Q* K/ O" m6 ~5 }- y E3 d1 xend
- C, [5 ^% E7 Hto regrow-grass
/ _ Z* d# a/ |) @! R3 k: N. k ask patches [& w, L9 ^# S3 n- b
if random 100 < 3 [ set pcolor green ]# _8 v- W8 w; ~8 {# p1 i( D' r
]) ` @% u! D# b3 z7 t$ X7 u/ }
end8 C9 a* \3 u2 ?, l6 Z& v7 E
to do-plots1 x7 r* F4 H- T- M' f' i
set-current-plot "Totals"
, w( D0 b! Y0 G1 f set-current-plot-pen "turtles"3 D P9 z0 X u4 @" E* R( c( J7 G/ I/ b
plot count turtles6 Q: o+ m, L8 I6 p: P8 d
set-current-plot-pen "grass"
$ t4 [. I( p- B( k" R# k7 a, g7 S7 | E plot count patches with [pcolor = green]& f% }- L2 w; F5 C
end/ m8 E* V0 }$ ], b1 ^& ?. ?1 m! d! d
可是运行时提示no such plot: "Totals"9 A% G+ U* w Q9 q
error while observer running SET-CURRENT-PLOT
, u% n1 H2 z# M: B called by procedure DO-PLOTS
! ^; _2 M- s7 j- Y) b* d. p called by procedure SETUP! [; y) ^, h5 e7 L' @" Z
called by 按钮 'setup'
$ n5 Z7 } I! S* k0 K求大神解答啊 |