我编的程序如下turtles-own [energy]
: {( {& }% d. G; z0 q4 \( Kto setup! H9 {/ ?$ N/ k2 x1 A
clear-all; o7 }! q) p% F' k }$ x" q0 n$ M
setup-patches3 x# u% E2 u4 _9 {1 |, D0 ]2 B
create-turtles 100
4 `0 ?- q- W+ i) O4 ` do-plots
# ]6 [. O2 J# Z ask turtles [ setxy random-xcor random-ycor ]
3 C6 n% j. P8 x! C4 T+ L" C+ P+ Rend5 P& C; e8 ]2 }( x8 x5 v. V
to go
6 h5 l6 a! d) d* T- o move-turtles1 n1 A6 K3 G* K7 N
eat-grass( k: u+ u8 d* p& h4 E9 d: z
reproduce9 V3 G/ g0 W3 c1 W$ F2 l) h& Z( i+ f0 C
check-death
8 W- V8 i( j5 N4 I( A regrow-grass3 F1 J0 E" [! C* c
do-plots
8 T0 q! P# z4 Y e% Q9 yend
/ ]" L$ y" v" {2 h2 i7 f7 ]( ^/ oto move-turtles5 Q, I; r5 R8 e
ask turtles [
/ q& {+ j% |7 |7 M5 P" P6 g& d& W1 V# n right random 3603 ^' q2 _8 b$ R* i8 t C
forward 1
9 D; a/ D3 y3 n6 }' T set energy energy - 1 E3 M7 f% O9 j; e, u
]) j' x+ q! X! N; }! G, P- F. x
end
; [/ s9 Q' F: F+ B2 s) e6 Lto setup-patches" a# w+ d% c3 r$ `4 W& }# Q; S1 a8 ^
ask patches [ set pcolor green ]8 Q0 N7 z. n. u. o" [2 |
end0 v" y& `4 X( n" n7 B( `
to setup-turtles/ {1 ^8 j9 D9 t- Z* X' U ]$ e
create-turtles 100
& K( [3 S/ D0 m9 ]$ _ ask turtles [ setxy random-xcor random-ycor ]
( Z) n) J% g: Z' Pend9 i) a0 C. J b* Z, Y# V! a0 K& [) }
to eat-grass' _2 w. @! _( X" O( |" {
ask turtles [1 h5 m6 r& [3 r* s" `# q
if pcolor = green [
5 `6 T4 d# B5 ]' z* x# m# ] set pcolor black' V# [+ t6 V+ Q$ d6 K4 q T
set energy (energy + 10)* f6 P( o3 B! k6 z. H
]: u1 c: A- _; H2 L, f' v
ifelse show-energy?$ q7 W8 \: N. `. R
[ set label energy ]
" }& J+ v l2 H9 I [ set label "" ]
4 m0 s) F7 ?' r$ \( H+ P ]
3 N: b- a- K: \# nend( F% O$ I# B: k5 U6 i
to reproduce+ V! j. i# @# S4 t7 G% Q
ask turtles [
" d1 b( _5 Y* c% |% _ if energy > 50 [7 K/ P* G6 x1 b* _ K) b
set energy energy - 50: |" F( f4 Q3 k2 }' |# X
hatch 1 [ set energy 50 ]3 g v: L' ^" R
]. j0 n2 {2 X1 A% S* C
]
7 ]: J+ k/ F8 q% w$ {end( y$ b1 d1 u R2 ~
to check-death& R8 p! r% u0 g2 t0 ^' V
ask turtles [
7 i2 o' t! l3 d% s/ T! P if energy <= 0 [ die ]9 y4 g4 ]0 o' ]3 @3 B5 k
]
4 w B1 S& Z( C! q0 T' _" |" hend
! H6 f. t( d' {2 i8 _to regrow-grass. e: n* I0 [& a. B
ask patches [; S; Y. E5 ?/ }2 u1 \5 a
if random 100 < 3 [ set pcolor green ]7 m" r% B! d7 E) W3 D y
]
; e' i+ I6 `: ^! m3 aend
+ t# m) G) ~0 _* D) Sto do-plots d" ?# {5 b2 k0 h( s, w6 ~
set-current-plot "Totals"
: h3 n3 `: i/ w% o: [. h set-current-plot-pen "turtles"
+ v" H a$ f+ L4 v* G5 L/ P plot count turtles4 D7 M" r: v% R8 `2 I: A
set-current-plot-pen "grass"
3 h; v$ u/ V% d4 R( r( K plot count patches with [pcolor = green]
% w: S, F2 s( b, r& ^end
8 G! G% f7 S5 v; J( e可是运行时提示no such plot: "Totals"
0 D! W/ k* N9 t4 x/ P5 Merror while observer running SET-CURRENT-PLOT
: r5 i$ t) f- e/ h; ?5 ]' Y! j called by procedure DO-PLOTS3 G; i8 w6 R) S7 y
called by procedure SETUP8 a; l1 E8 N2 P+ T; \
called by 按钮 'setup'# ?, I) m. g3 p d
求大神解答啊 |