我编的程序如下turtles-own [energy]
- ?# V9 P) Y- \3 F. m) m! l$ R* i! Xto setup
) `9 ^# P3 y! L9 P: A) f* m clear-all
. D4 ~) J9 A; d$ o& G% n setup-patches3 Q" k/ Y/ m( r6 P4 c# j+ C: V7 t
create-turtles 100# P+ k, ~) ^$ f1 F3 {
do-plots8 H4 C/ i/ d! h- k" |0 Q0 B$ i# u5 s
ask turtles [ setxy random-xcor random-ycor ]
+ e6 u. |& g% d! u2 v8 r* D; rend8 G; w, l. Y7 D5 _8 N
to go9 i4 _1 A1 C* ]3 R
move-turtles2 j5 ?: c0 _) d/ g5 r A% @
eat-grass
% \' F: c$ h$ z' u% ] reproduce
# n, X, U! H. G9 j& K$ l check-death
9 _6 v9 H) [, G4 Z7 E, I regrow-grass6 _ y1 \. H3 d
do-plots) ?( M) ?. C8 P) I
end- i) |- V0 U0 i
to move-turtles- r3 F7 P( H7 ^6 u9 ~% J, @0 s( D
ask turtles [- a, A& }5 B' b. X# t) r7 M- Q
right random 360" w" _4 U1 f6 V
forward 1
7 O2 P& U1 q0 \# q8 ?8 t set energy energy - 1+ p4 g' X- v5 }9 \9 _9 q
]
2 T0 I R/ b+ D# M7 `5 X; j$ T! Iend7 B% v1 W+ o1 |, ?
to setup-patches3 f. b, n' V: c" R! T; D9 O Y4 J
ask patches [ set pcolor green ]
6 e( X) O5 I' d; e9 z! kend
/ y3 a# H8 T% Q e; ~2 ito setup-turtles
" \( q2 ^+ f. x& a+ x9 U; e8 e create-turtles 100
. r U+ X4 N) }4 n1 ~; I/ l ask turtles [ setxy random-xcor random-ycor ]
( Y" I; K$ l/ o9 h$ send( E' L$ R5 W7 y6 T8 I/ J9 O" P
to eat-grass
0 |! ?% c5 G" }: j ask turtles [+ M C6 s: m! W
if pcolor = green [% K4 j9 @. E% R
set pcolor black4 }, Z+ `0 |5 a% K7 S& I. I. g
set energy (energy + 10): w4 F# x, s7 m/ D6 S4 u
]8 \6 Z+ x6 {1 q$ {# |
ifelse show-energy?1 k j% z5 L& V
[ set label energy ]
( o4 b3 t- {4 T$ ] x [ set label "" ]# i. r* a0 Z! l* \: U! x) q; M) q
]5 T6 k2 D) X1 n5 D6 \3 s, M
end
$ M# }9 t$ d% S( U4 U* B0 ?to reproduce. ^9 N2 y2 Q1 c" W
ask turtles [
7 A2 C0 s1 c( i, t if energy > 50 [
U/ ^3 i! i5 @" K0 n set energy energy - 502 z. U, Q: r% N) R# v
hatch 1 [ set energy 50 ]* d9 h+ H5 x J0 `
]) h8 r/ X$ j, j
]
6 E, R; ]: ?; f' f8 f! @end
6 a3 O# z" K9 }! f" n" g( uto check-death
4 t, u) t( Y+ D# _. _# U! T. w' s ask turtles [6 Z4 j D, r, y) ~) W
if energy <= 0 [ die ]
9 r. R) h, _# B ]9 ]. k% u7 m6 w# I+ |9 {# j+ x$ y
end
6 W6 P' p5 q* A* D1 `, T0 Nto regrow-grass
' d) x( }2 b1 g# } ask patches [2 Y3 D" _/ ?: `# ~( Z
if random 100 < 3 [ set pcolor green ]
7 V+ l8 t) Z9 F9 M& _: m ]
. M3 H. {( G; G* X8 b" I0 }% M0 _% zend& j# P" `" F% N0 d7 t- |
to do-plots
. b. z) B* o1 ~1 u) _7 P, g. z set-current-plot "Totals"
* W4 c. B+ b* R& Z2 w' `! Z/ v) { set-current-plot-pen "turtles"9 r. w0 y( B* S% I9 e: v! [* D( q# q
plot count turtles9 R9 O5 `3 a$ o
set-current-plot-pen "grass"
9 e& H7 M2 D& n% A6 r8 U0 @ plot count patches with [pcolor = green]
+ b6 ?" q- Y+ e o0 C4 ?end
6 X# J/ J* F" B" n9 D, i- f- ^# {可是运行时提示no such plot: "Totals"
+ \3 y5 F: C$ ?- U/ i8 Y3 verror while observer running SET-CURRENT-PLOT
9 N9 f* x! L" k called by procedure DO-PLOTS8 l' ^- I. L8 B, }
called by procedure SETUP
" w' b3 D3 Z: {- ^! ]% v called by 按钮 'setup'
1 A2 `5 h* t! E2 i求大神解答啊 |