我编的程序如下turtles-own [energy]
8 @3 x3 Z5 e0 J7 i. h" \to setup
$ E' ^% C t9 W; l" D clear-all' G2 M6 n% i# P" j I
setup-patches- R) z: Y3 r6 h! f6 w& t% x' ?3 K" S
create-turtles 100
4 Z: l* ]: ]2 E$ G do-plots# ^1 d0 k, ~" b& O, o+ z# ]
ask turtles [ setxy random-xcor random-ycor ]. ^6 y# Y3 x& h
end, e7 r7 R. P# B( i0 B
to go8 Z ]: x+ W) s/ S0 H
move-turtles
- V4 Z- U8 `9 e) w: \) [# m eat-grass( e8 `2 K8 H: Z9 g8 C7 n# Y7 J
reproduce, y/ J8 s. e* L2 M. c: W
check-death
1 h& E4 |0 {( G! X3 E regrow-grass
- [ y; Y" M9 y5 O0 J- l do-plots
7 \8 Q4 G9 n1 v/ Send
+ @0 L. a5 {- a( g1 a$ E7 d+ b7 Q, Uto move-turtles
3 m Q5 O: |5 d( B4 A5 Z I ask turtles [8 V' e- u+ [( t# P
right random 360
# e0 e' {- J, m! d! @5 e: B forward 1
3 S9 f- X* K5 X- _: M set energy energy - 1
: M* C& G6 f# Q1 K, |) ~! _4 A7 F4 H: i ]
8 f7 E2 @+ r2 c7 kend0 i! N, B, k& Z# c4 p
to setup-patches
8 @$ s! C4 o5 M1 Y ask patches [ set pcolor green ]7 U$ C) i" H, T) h2 K4 D! `. h
end
# [) t7 h- J) O- f( s- a0 Jto setup-turtles, O8 ~6 G* E* C% }9 [9 E
create-turtles 1000 h" \: d7 }, {9 q) t
ask turtles [ setxy random-xcor random-ycor ]
; u+ U" N: z+ l2 z5 z! B6 P3 Lend- A' h7 s X, T- F% n
to eat-grass, _; @9 y: Q8 d$ L7 g
ask turtles [7 {" H- M! h6 `6 z" i
if pcolor = green [ u0 w( w2 o) q- T
set pcolor black* a, K% u: }' u3 r0 g/ [4 Q
set energy (energy + 10)
* Q0 }$ n6 b& U* t ]
: K& R- A) t, ^' z ifelse show-energy?
2 N4 h2 r: A& k2 J. n( r [ set label energy ]2 T6 u; [1 w/ _. ^
[ set label "" ]. e7 u; B3 o4 C& I! w: T0 N; y
]6 s/ ]5 ]9 h/ i" a2 t
end, o6 X0 C0 \8 r) e: {4 N: S6 _
to reproduce
; L4 X+ q% @* M. x. W ask turtles [
2 r4 {- n' U, H& @' s if energy > 50 [
) w* H( j p! G6 m8 x) ?# b" c set energy energy - 50
' \8 \6 o1 U* L! Y# A hatch 1 [ set energy 50 ]
( r! L' h; ] `% Y/ Q ]
9 e% ` G% V9 m7 [* D ]- y& v$ d. U$ @$ j
end
! }* A) s- R1 v1 _ t+ lto check-death
$ ~( h$ }. T& n8 f9 q' I ask turtles [
" ~. t4 c* @0 v- W4 O; L if energy <= 0 [ die ]2 E- G8 o) ]4 |: n
]( h) ]6 r# u) L- C" N, n( p
end
) \2 ?/ }7 {! I7 }( s+ _to regrow-grass
+ k* V/ t1 B$ \0 ] }) b2 G: f ask patches [" |8 |1 o; v& ?8 ?. j
if random 100 < 3 [ set pcolor green ]
7 ]7 k }0 u, x ]
: Q! O" s6 ]3 ^; e8 K1 ?6 x; {* send/ H0 o! W1 D3 U' @
to do-plots
$ j/ H- m0 Q7 x) x set-current-plot "Totals"
' ]& F" l9 V: B5 }! {# J. b7 O4 f5 [ set-current-plot-pen "turtles"+ t6 A% D3 ^4 c g( ?
plot count turtles+ y$ G. j0 f: t2 D `
set-current-plot-pen "grass"2 ?) {" m# J3 s) m6 b4 H
plot count patches with [pcolor = green]* ?5 T9 @0 p6 B8 }1 {% {
end
! P, A+ \% @0 g0 n/ m M$ ?可是运行时提示no such plot: "Totals" g, X x, H5 }6 @% }" }1 k9 d
error while observer running SET-CURRENT-PLOT
% _. Z" l9 M3 R, f+ [% G1 y called by procedure DO-PLOTS/ d$ O. D0 D5 r0 `2 w0 j
called by procedure SETUP: k' @9 T1 j$ L
called by 按钮 'setup'+ \( U% n3 i9 O# j
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
