我编的程序如下turtles-own [energy]
6 c% \, B8 w' r+ H$ z# oto setup
6 n- t6 B) J3 c) q2 V clear-all
' _. F2 \6 H6 }! ^6 h setup-patches7 u5 w1 { F7 ?2 A
create-turtles 100
& k: l! O4 z8 k$ F$ a do-plots
1 w" O: J4 r+ A0 y ask turtles [ setxy random-xcor random-ycor ]
3 [, v: w* k ^9 vend
3 U# Y+ F+ g$ ]7 v7 pto go6 {: L& t0 I% Q8 V' _8 U# b( q3 C
move-turtles
" d4 O" q$ Z) A eat-grass2 z5 q0 |* i' | V8 p6 r. _
reproduce2 ^- W( U2 g; t4 {- t2 M- v$ k
check-death) M- F4 ~" i0 b* e0 b8 I
regrow-grass7 p: R, y7 x7 q: y
do-plots2 o8 e" k5 C! F+ {# T5 }
end1 i/ \3 F+ m# w! ^6 z' x' w" e+ t
to move-turtles
' W* M8 H$ \0 }& _4 ~* L: f3 A ask turtles [0 P2 ]1 E Y5 ^4 o7 i! ] j
right random 360
: m' _% p, O/ p x( e forward 1
* V! I5 K# g- k7 n$ G; R. H set energy energy - 1/ c& r5 D s7 X" _: g
]
" U- @+ B" _/ M9 fend# @4 F9 E- K5 K- n- S
to setup-patches" P" v8 M% r8 k5 `1 c" F. q
ask patches [ set pcolor green ]$ I$ f5 | h$ N3 V0 w3 _
end. D: V2 i# g+ x1 V: K) {
to setup-turtles# ~9 n$ _9 c; E2 S, u, d
create-turtles 100: L) X! C& c- Y5 g* Z' A( o
ask turtles [ setxy random-xcor random-ycor ]
( {( c e( f$ Qend6 _1 j ?4 d) z. u. D, C/ Q
to eat-grass
' A1 {7 D% M& s ask turtles [
' T( M: T; N; o# L" h9 \ if pcolor = green [
$ w5 F: y5 J* A* _$ t set pcolor black
6 ~2 f4 |" R0 h7 F( V' V6 b2 I set energy (energy + 10). q& M% {0 L n2 j! X* N
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ifelse show-energy?
; p# u0 r. [* G- | [ set label energy ]
0 B u' [. [/ V$ S' M/ w [ set label "" ]
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end
; G7 o# [ C6 e0 C2 Mto reproduce4 {: a$ R! o3 \) t' ]3 ^
ask turtles [
+ }( K2 Y; f3 H8 v$ s if energy > 50 [ T2 b9 `" c* l l$ J& W" e
set energy energy - 50
) I; F! F9 K+ q9 @2 A6 q! w hatch 1 [ set energy 50 ]( x8 K* M/ A$ h8 E& X
]; ?0 h# H. i6 b" ~7 b3 n V+ L
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end
' t: T; ~( U2 I1 i- B4 [to check-death
8 \* [0 E$ _8 O. e ask turtles [
+ r. _! A0 J% L D if energy <= 0 [ die ]8 r$ Z) C6 \: u) H, g3 {$ Y; u. y
]
. _7 ^. B- x, E' Y, Hend
: [% O8 }% g1 [0 E7 Yto regrow-grass
& ~0 Q$ h* y; A1 y& C9 Z+ y ask patches [
$ X% g# T0 `! S0 N7 ?: q1 e if random 100 < 3 [ set pcolor green ] l9 G, J5 g7 B9 T% ^5 O; a4 C+ q
]; }, a. `% _% e( c
end6 o- u7 \! _* X, j# ]6 U6 K, f
to do-plots
; U$ Q; s6 t+ s7 t set-current-plot "Totals". Q# ~; w: d: o, Y6 V/ `* U
set-current-plot-pen "turtles", \3 i7 e! l* x% E2 s
plot count turtles# ^/ H p o! v2 d3 M$ ~
set-current-plot-pen "grass"
, v; u/ x: a3 `' o4 Y: | plot count patches with [pcolor = green]7 J4 B$ V' ~4 n0 g6 c! h. ]' j
end) n5 h. ]" Y: m; d6 y) s
可是运行时提示no such plot: "Totals"
8 |5 N) n) S$ v7 L$ `& K. O/ Aerror while observer running SET-CURRENT-PLOT/ C/ m u% W$ m7 r# G* i" p5 Q, e
called by procedure DO-PLOTS' |; X; N' }$ p3 H$ k/ k
called by procedure SETUP
6 P+ U1 G' ` b" o% k! L called by 按钮 'setup'; `0 d. N+ t0 H6 H4 N0 b5 \
求大神解答啊 |