我编的程序如下turtles-own [energy]6 u" j% ^8 ~0 k8 `; x
to setup
7 q$ Y- a5 t: i3 A clear-all
0 `& v* p+ x. q' u% }2 J" Z5 n setup-patches
! l2 A+ i! I8 ?7 L, ? create-turtles 100) |$ \) d* z: e9 {9 ]1 Y4 D. ]
do-plots
, [3 T( t" B4 V ask turtles [ setxy random-xcor random-ycor ]
7 t" N/ ^0 s( l6 a* Send3 l% ?8 K0 e# \6 t3 i
to go
$ V2 I& L% ~7 p move-turtles
8 @2 f) Q8 h- {2 }: q6 v0 ? eat-grass
# X5 V3 E4 W4 w& D1 t! R reproduce2 g ]2 U9 G; K
check-death
; [! `( O0 O( l/ d) | regrow-grass
2 ^( k& B& ~- [0 P! h, e5 j J5 q do-plots
6 {' C7 I3 G e+ M( kend
1 T: N1 k' j; x8 c' I% \to move-turtles
5 K5 Q& @% z3 P! o0 L; t ask turtles [
) L1 E4 ^3 h3 n* }* v right random 360
& F& ^5 T' i- l- y/ \ forward 1 Q* A* l! N- v& Z; }% L
set energy energy - 1+ Q; n7 V/ R" Z) t/ Q! H2 a. w1 Q
]
/ L) d1 p- n, r0 Z" n4 D1 Aend
7 Z0 H6 w# B! [5 i8 Bto setup-patches
% V- o4 ]: f* g$ m0 s; p ask patches [ set pcolor green ]
( F9 q$ t1 e9 Mend5 u4 C$ {1 {* m b% r# H0 X# T6 T
to setup-turtles. B, f) [6 h# x' F( g6 T1 r) L
create-turtles 100
# G) G5 W9 R) K6 L: B8 e4 a: d- i P ask turtles [ setxy random-xcor random-ycor ]
% H0 D( Z( C. S" x6 D2 P. }end* @, {2 X, _2 G4 A# [! }
to eat-grass
& F: V/ _$ l8 W, j ask turtles [- C( a0 l! l+ X l3 ?
if pcolor = green [
" @9 I" D9 K) V) T/ P/ M8 v7 ? set pcolor black- ~5 i, f4 l8 [2 t
set energy (energy + 10)3 D: R! g* q4 J' Y
]; Z9 O7 _4 v9 `$ `4 a# e" n }, Z
ifelse show-energy?
% u! x7 e, b2 O1 Z. a [ set label energy ]
7 ]" z H7 e, G9 u5 `6 l! r [ set label "" ]' O C% W7 k- \- u; e! ~7 v
]
8 }; V6 M- H9 c3 f: K9 [* H6 mend
7 f, n( x7 \ I0 N# y; Gto reproduce
" m; K, [# n9 w+ {( _ ask turtles [ B' [( s, H3 b7 a
if energy > 50 [5 r- R) _% y# ]/ e
set energy energy - 50
5 F1 v. c/ X0 C7 N& h4 ` hatch 1 [ set energy 50 ]
8 O# y8 x6 J9 q S) C ]6 Y. A; S1 _; V! Y$ v& }! k2 n" z
]
; q7 U8 q6 `3 U+ M4 V4 dend
" s! [/ x$ j. t/ Vto check-death1 U* h: F( k' M- M0 l6 H" B
ask turtles [
) F" ^ i3 T; j4 I, J( h if energy <= 0 [ die ]% z! D# p0 e8 S
]
! h( G2 y* i) u0 @# Y7 B1 F( m/ rend
3 r5 J# X$ u( h4 hto regrow-grass+ N3 J& P3 H: c, D: P1 Q
ask patches [+ m4 U; ?6 o& ^8 D
if random 100 < 3 [ set pcolor green ]9 F+ M9 C( Y% P! E' n) n5 u# E
]
+ [) {4 G4 y4 X P- Aend
1 A' G! C3 ?& hto do-plots
' H7 s: q4 P1 O1 e u5 { set-current-plot "Totals"4 P$ P% `9 v+ h; a5 o
set-current-plot-pen "turtles"3 P5 N" Q* y& r! f C
plot count turtles, X, ~0 ^: M) f. D
set-current-plot-pen "grass"
, V( S$ ?1 T: p plot count patches with [pcolor = green]
; \, O) w6 Q, k' Jend y! E/ `% O- p0 I
可是运行时提示no such plot: "Totals"+ i. z9 X. |/ V4 L
error while observer running SET-CURRENT-PLOT$ O. V5 d2 _, [6 o) O8 B, \ i6 ?$ P1 m
called by procedure DO-PLOTS- Y& [$ G% ?/ K' `2 P* ]8 T& }
called by procedure SETUP8 ~# `0 h0 D4 T7 G( I; l1 \. j
called by 按钮 'setup'5 R( L3 `# K, T0 E5 S4 {
求大神解答啊 |