我编的程序如下turtles-own [energy]
# k, A2 ^" g- d2 U* @to setup& j0 h9 f( _% E# t
clear-all
) }$ y1 m' j8 r, ?+ F& D setup-patches, ?3 P3 P6 f" {# s$ L# I
create-turtles 100# W- U. d" p; [+ C- A1 ~
do-plots# U, ~3 {( c4 P/ S$ }% F7 q
ask turtles [ setxy random-xcor random-ycor ]- e/ a2 N0 t* `% e/ L
end
1 n/ e' R) g" ?7 Lto go4 [2 K4 F; g- S: j
move-turtles
5 t4 e$ C1 d" q4 r' M# ^ eat-grass/ I+ A% B; N0 ?# m r6 c* {
reproduce
0 E0 j& Y- |+ P8 ` check-death& g6 q; J I/ i& t! A8 p" a
regrow-grass6 Q5 W+ b7 G' w! a5 y1 G
do-plots0 V- t5 n, U' {$ }- W+ U% O2 ^
end9 J3 Q4 V, K! e
to move-turtles
) C$ ]; o# K# z6 a) r% l3 W& K5 d ask turtles [0 c ^! o0 p* ^% C' G3 t$ R0 E
right random 360 i/ f* z: x; l2 ?( J2 y
forward 1+ N" ?' W9 t6 p) O
set energy energy - 1
$ m7 W3 [8 V8 j+ i2 ~- R% g ]* ?, |; v) Z" c- H; I
end) W6 E6 W& ]# Z4 d0 c, K
to setup-patches
, l& { C" {) s. t6 S' O/ B ask patches [ set pcolor green ]- _6 R3 A; v) m' b/ Y
end
- q$ H# S) l4 V0 }/ @9 Ito setup-turtles; ^4 K' F9 q. K9 \3 ]. t2 y
create-turtles 100$ J$ L. w, @% S8 X1 y4 q, M. ?
ask turtles [ setxy random-xcor random-ycor ]
) @/ e3 p6 d2 jend
1 ~: T! Y# e, v+ Tto eat-grass
# b# n! W$ L8 T. _6 f8 I+ ? ask turtles [$ x8 w% T) G1 j0 y; @1 F
if pcolor = green [9 o3 L" r7 |/ M" T
set pcolor black9 ]: w# m# n; A+ O" a+ ?, s3 p& G7 V
set energy (energy + 10). q. y4 ?( i3 V
]
+ v; v/ ^ C; P$ O4 }% W ifelse show-energy? D8 z" m& S2 n; U
[ set label energy ]
' {, x4 J. ?* _ [ set label "" ]) Q0 D9 U$ ^2 _" p2 ^) N! M
]
6 V3 ]. w$ q# C) y; `; \8 @" Eend$ ~: e6 f3 k' B% J4 I$ _
to reproduce
! Z% C$ e" ]! Y, s ask turtles [% T- b; P/ Y2 L3 V5 t) j. C) e9 M
if energy > 50 [( C% w8 Q- n% `* B7 l
set energy energy - 50
4 @) W" b# ?, J7 A$ J, l) a hatch 1 [ set energy 50 ]
; N/ {, M9 m* ^; e ]( x l5 L z4 Y% X) y. S; w. y
]
5 Q& n; Z3 k2 d4 N" f; k" gend
/ I Y# ?2 h. k& w1 lto check-death
& o! m% r4 W! U: Q ask turtles [+ e; k1 t4 }, E
if energy <= 0 [ die ]7 m+ G( e9 u @8 h/ ^$ n: K
]
: y4 e; D) }' a+ Q0 Jend; m$ D" O9 o4 b/ V+ J6 M
to regrow-grass, e a/ I1 R- t% P/ x) R$ R
ask patches [
U2 J0 x$ x9 \8 L if random 100 < 3 [ set pcolor green ]" b) o! L2 a8 N; r; c2 W
]
4 a- p/ x( r# F; @end
4 Y8 W5 n* o/ B t2 Eto do-plots8 T3 w8 M# q* E! p& P0 d7 U' N
set-current-plot "Totals"1 |/ @- q+ U% A! \& y. d
set-current-plot-pen "turtles"
% Y- s4 Z( T+ x- G4 _ plot count turtles
, {3 K; H. I) q& u# O3 r+ m set-current-plot-pen "grass"" S) O# q; |# c8 `
plot count patches with [pcolor = green]' z1 H7 e' H8 @: o% n; o
end
( x* }/ U& |0 _5 n可是运行时提示no such plot: "Totals"" W# f; P- I/ k+ d+ d7 @
error while observer running SET-CURRENT-PLOT
6 g. K9 x/ i/ \+ o6 w called by procedure DO-PLOTS
1 v5 {0 A2 s6 b0 |' ] { called by procedure SETUP
0 H7 K. O" n( {. H# O$ t called by 按钮 'setup'
* v# t( q; A" ]' ]求大神解答啊 |