我编的程序如下turtles-own [energy]
" j; t5 J3 K9 A+ ^) c% q" r5 Xto setup
8 t& u; S4 ]" n W7 z& m+ ^ E3 g2 B( z. I clear-all
4 K7 E3 ^, H. X; p. G1 D! W2 X; w setup-patches
?' [, X9 f" E create-turtles 100
- A: b$ N: q" E do-plots' P5 J1 c6 O% h+ o% ]
ask turtles [ setxy random-xcor random-ycor ]4 z* u3 i/ M' |
end( m6 x4 {6 x: x8 O2 Z
to go1 v/ i! K6 w8 Y
move-turtles0 ^6 Q# H1 f, R, v
eat-grass, v5 a5 e! }9 A2 K4 v
reproduce7 {% S( R& b6 j$ k6 K; R0 b
check-death6 d; c3 ^6 m) ~2 S+ j
regrow-grass
" e5 p- p( o+ |2 Q8 I0 ~* k do-plots) x' _/ t' S0 i- l
end
3 D0 I1 E2 M# mto move-turtles5 h6 i0 @* V7 N3 P* r- b
ask turtles [
2 R8 b. ?% ?+ T$ |+ d2 W right random 360
6 P" W( I: h# ^. X( d( J forward 1
1 V0 `/ c1 u+ k( z7 V set energy energy - 1% A" H0 Q3 r# C! D. J8 o# |# Q
]3 z7 P$ V- o2 ^% Y9 C5 U* c) U
end
) v- }$ S$ m) r4 Uto setup-patches
( s' e2 Z+ @0 ^, D; l& }4 { ask patches [ set pcolor green ]/ P0 r* ?, l3 Z* B
end
: q9 ~; \5 v+ P8 r% L, o6 A, nto setup-turtles3 e3 Y. X* [/ Z: n% A6 a1 J1 R3 Y$ h
create-turtles 100) F0 n$ C2 s7 e7 y' ]/ k* m$ t
ask turtles [ setxy random-xcor random-ycor ]
$ f5 i: b% ?& j" K+ Q( Fend7 M3 w/ Q! u, D1 L7 T. k
to eat-grass1 t* k% r& H% K5 R) L
ask turtles [9 d" u: D0 c9 K. t( K9 \
if pcolor = green [
2 {# `1 ?" \, ~ A& D; j7 u. s set pcolor black& H( E' o- U: X8 t1 m7 n
set energy (energy + 10)
5 ^$ Y' x1 ^& Y/ j ]4 z( Z0 r( J% D9 N2 f
ifelse show-energy?2 c, n2 R# w$ M- e
[ set label energy ]
4 {# C5 \# D) @; b$ k5 K: r [ set label "" ]* I+ n+ e/ ~9 |( c) r" K9 a7 m
]! X5 l7 ~1 d. N. s+ T3 H, r$ |
end( P$ d9 w$ p3 L8 {4 p, o1 ]1 I
to reproduce
/ z8 F' p- ]/ W: \ ask turtles [
* Q( c& n# j/ I. `3 S% e if energy > 50 [
- b7 H2 V/ A8 @* H4 ] set energy energy - 505 d8 W3 t9 U9 {0 m( X( O% J, W: j3 A
hatch 1 [ set energy 50 ]' h4 @0 v% {3 g" \0 m8 S2 E
]
$ v, _3 x1 [& Z5 V2 ]7 p7 l( k ]; g. t1 Y0 Q8 r3 v$ ]. \
end
7 |5 |0 ^- B# y$ ato check-death
3 `) M a* e7 g/ k' B ask turtles [
+ ]7 q* L: [; `% @! V if energy <= 0 [ die ]! i2 r1 ^) c6 F
]0 T. x' ?9 Z. }( i5 Y0 P1 L) {
end
` ?$ m% U: ^& _to regrow-grass3 h4 ?2 u3 z) y- b, l
ask patches [
0 P* Z0 L4 i. V8 ^ if random 100 < 3 [ set pcolor green ]9 n/ Y) A9 o4 [, t x
]
7 {6 e7 z% E jend
) v% q* F9 m2 g M8 z: tto do-plots) ]: f. V0 Q4 x; }
set-current-plot "Totals"/ p7 i0 d6 W& }7 t% H' v
set-current-plot-pen "turtles"
& t9 h& A1 F5 K) T" i0 z! _% H2 e plot count turtles
* A4 l% N6 x# C) v set-current-plot-pen "grass"
% s$ V& J% {' t1 W. f& z) p* x, J [ M plot count patches with [pcolor = green]* r s8 h1 F6 c' ]- j% }
end
: f2 y/ N: }9 e) v: A& d5 b, J可是运行时提示no such plot: "Totals"" Z9 i% D4 |, e) d2 W w
error while observer running SET-CURRENT-PLOT
4 \3 `3 d( L8 w called by procedure DO-PLOTS
' |6 E" R! h3 L called by procedure SETUP, r9 y6 ~ n; [# S6 Y3 s! P6 y
called by 按钮 'setup'
4 ?) h3 A' }' W* z# @8 ^; b求大神解答啊 |