我编的程序如下turtles-own [energy]; v* G" \5 O+ e4 Y4 g s7 k
to setup' c7 p- _, G) O" I# y: W2 R
clear-all
( o6 l' @5 ^2 @: [$ C0 G$ I setup-patches: W, g5 `: o" c0 r9 E( G
create-turtles 100$ p: k+ p$ O0 F: o# ]) Q6 ]
do-plots
! T0 \: @, n7 e+ h! e3 o1 ~ ask turtles [ setxy random-xcor random-ycor ]% z' {1 ^; Z+ \# J
end- }& t+ }. d* U+ E, X! v8 N
to go& |4 Z; `! ^: Y+ L
move-turtles
. X8 F& L" F0 Y( m- `; ], F1 x/ s! K eat-grass, d/ @7 ?) t, l- d5 L& X
reproduce, ]5 e9 i! A& h# z d/ R
check-death
* U( Q: p' i O# { regrow-grass
% K3 M- U1 [: Q# F( [' @/ s% o3 U% }9 t do-plots& S& B6 R% v4 X5 r z. W
end# W; l/ f$ J$ u' l' H) e' ]
to move-turtles% S* {2 p+ ~* ~0 K* ?
ask turtles [
, x( W8 M$ |3 B; }& h) J. S9 e9 T right random 360
8 w2 _; s r* ^ i' g4 P0 ~, r" K forward 1
9 A0 C- u3 P6 _0 Z$ U% [* e- Z1 o* t set energy energy - 1+ R( M6 k% q L1 ~& S; [, U* h( y. p( F
]
' W/ \+ N2 i% e; g8 jend
0 Z! [, T" |- ~to setup-patches
+ ]8 m3 c* O' g/ D1 e ask patches [ set pcolor green ]+ i8 R [- g) e1 I
end
, V: f7 z) O; q8 s) Oto setup-turtles9 r; B) f' R8 a$ E
create-turtles 1003 a$ W; I! z8 ?, l; y8 H+ a
ask turtles [ setxy random-xcor random-ycor ]
7 @ S2 L2 q1 y) ]8 P% [3 rend: c2 \+ S2 o7 G8 d3 N$ B% A
to eat-grass& U6 c" e$ H r$ I! D. @8 Z& Z. [
ask turtles [
( W7 ~$ i" H$ [- G9 ]3 | if pcolor = green [+ ^1 j4 P2 l7 e( e; t y' r9 l/ Q
set pcolor black! e" J: W$ \1 T: T4 e$ w5 R
set energy (energy + 10)
2 l* ?" g( M( b+ W5 z ]
U+ }! ^& j+ m4 Y; P# p ifelse show-energy?9 R) ^6 i* O7 R6 o1 Q0 R2 W
[ set label energy ]- f1 \( o2 x' M, B+ B. }
[ set label "" ]
1 s- V6 j" v( f5 N( h2 o ]
9 w5 M+ @! J7 Kend
/ L: [' z% t: C/ Z! G3 sto reproduce
o U; S. i' U8 z0 i ask turtles [5 }+ ^' T, q7 G
if energy > 50 [
0 n: _0 P: C/ F* ]( @& h# I7 h set energy energy - 50
7 B% x3 p7 D: O; x% z$ c. z hatch 1 [ set energy 50 ]
+ x4 r/ q9 F' O) b) P, |: k8 ]0 e/ [ ]3 Z1 Z! s& o/ ?5 d( Z
]8 }( ~& l, c* c! w7 [% B
end3 o# z" S" c: s$ z8 z3 k( X% U; q
to check-death0 n# D- h" z$ W, Y5 c, M
ask turtles [
& b" `, D' @: \2 a7 v; U if energy <= 0 [ die ]' f* `1 I4 S) L P
]
' X- Y2 _; A9 F$ D2 m) ~5 c8 Zend4 x7 f- }3 a% b5 K) {
to regrow-grass$ W" l0 K* M6 X" E0 Q+ L
ask patches [
1 h1 G+ }. ^+ L* S, H if random 100 < 3 [ set pcolor green ]) J0 [8 {7 y1 R( G1 D8 e9 w" w9 c0 w
]
* \+ f- q( F M) ~' I5 Vend
/ h: O6 R% `/ h R5 C: Uto do-plots
( M0 j) a# I" x. h: Q set-current-plot "Totals"
4 I6 _5 a6 [) c5 V7 s' U set-current-plot-pen "turtles"& g$ u% F5 s7 ]- s" ]
plot count turtles: }! `4 ^; P2 m
set-current-plot-pen "grass"/ @0 b, b* }. C% S$ m
plot count patches with [pcolor = green]
& T' l( a: f/ q* ?end. l2 t1 ?% x# O* x
可是运行时提示no such plot: "Totals"; h4 |8 T8 J/ w' L3 v
error while observer running SET-CURRENT-PLOT
" D, J# |, _# e. O) t! m called by procedure DO-PLOTS8 j9 [1 O' ^, C: t& O9 f
called by procedure SETUP
+ a @3 o3 s+ k2 O called by 按钮 'setup'1 _; `9 `: H0 r1 t& Z
求大神解答啊 |