我编的程序如下turtles-own [energy]6 k% J1 g q+ P- `( j
to setup
) P- s. i _3 q9 ]* l3 \6 T' _+ m& J clear-all
: h, x+ w2 R( u, @. ~, I6 | setup-patches
8 q0 X! D& [1 o6 q+ [6 l create-turtles 100
: H3 h( e" z( j do-plots& ?* `* {# W8 D+ H) o/ i: _7 z
ask turtles [ setxy random-xcor random-ycor ]/ ]/ G: K5 D, r: a# }6 K6 U1 w, q$ s
end
/ t Z* r$ l" d/ @ t9 j0 `! Sto go! X3 h; o6 k) |) x" k. _
move-turtles
$ ~. |( w1 Z( o, C( s- \% o1 h eat-grass
3 N3 k1 M' V1 \0 p% [- p0 V4 V) H reproduce+ h/ l! f" @# O, M8 X5 k' Q! A
check-death$ X5 w6 s' i; n- U6 |( ?( Z& f
regrow-grass8 U6 ~( f* L: p3 C6 Z! D
do-plots1 C- o: o. L4 C0 X- c0 k; q
end8 z E- `+ Q& M1 G
to move-turtles
- l) U/ H; w$ j8 v: M1 ^9 G ask turtles [; ~! S- J$ e+ M: N5 C3 s3 v
right random 360& t7 R$ d3 V# N8 p! h
forward 1& N( T0 |- L9 w0 L# @* y1 j
set energy energy - 1
6 K% R* o( `/ E: ~+ O ]4 H8 h3 ^; H$ O/ Q1 V
end f& ^- m5 Q) ?" H `
to setup-patches$ s( H! t) }3 j3 P0 p, X B6 k
ask patches [ set pcolor green ]
( ]) f) T- P6 N7 ?1 r' kend3 M- r8 q1 d# h T8 M8 {
to setup-turtles' s- v& ^) ]2 g C
create-turtles 100
! u, [1 K l' F9 F9 D/ p ask turtles [ setxy random-xcor random-ycor ]
6 F5 b$ C- f% Dend
" ?# C7 }, E% N8 e# W( @to eat-grass
0 U* G9 L B' R$ D, d$ I7 ] h ask turtles [
: Z/ w0 n6 J' `# c2 s if pcolor = green [
, T" y1 \) [/ o ^$ T set pcolor black
" o' a% K F' a) V set energy (energy + 10)
# Q! l K4 a6 E1 f+ g ]: ^5 P8 v. R8 i- E5 \4 Y3 b9 v
ifelse show-energy?
: O2 _9 `9 z' I7 Q% d6 N+ k" A! f0 S [ set label energy ]
- o, S/ b6 }; }; L7 A* l; u/ ~ [ set label "" ]$ G* ~! r0 V- I
]
4 A' U. s6 U0 x' Z" Y. yend
% g: _/ s0 k1 cto reproduce+ ]5 {5 g) S4 ?$ d% J$ d
ask turtles [
5 _# h3 f( x# } if energy > 50 [8 M" ]& _( E6 F! J% g
set energy energy - 505 g# h" b- f9 Z; y$ c1 Y; S1 v
hatch 1 [ set energy 50 ]5 N+ R( W3 d' }, T. l- x" h
]
8 V' Q( p- z0 \2 d+ ^0 i8 o: k ]
, {$ G/ L: y+ F) u: B. E- yend: k: b% E6 e7 }" G
to check-death4 H9 j! y3 t4 \7 g
ask turtles [" y# m6 F0 K8 j- F% A
if energy <= 0 [ die ]
$ L6 n% n- B% @& z1 A0 y ]$ X& }) J! A! }
end
' z. P1 R7 ]2 Zto regrow-grass
' E& q7 H/ k, J$ j6 {9 B0 Y ask patches [2 |4 J M0 w% h) u6 Z" e! e6 g
if random 100 < 3 [ set pcolor green ]
0 a! V3 Q; b; f9 [ y ]2 O7 {7 u( H) c" Z8 r
end& p6 }+ [0 S- g; x# q( R
to do-plots
2 d- N8 ~9 z1 |9 a% f! G+ C- y$ R set-current-plot "Totals"
( c& v# x" e. M) [3 }, K5 J# q set-current-plot-pen "turtles"/ p" V. x$ ^3 c% `
plot count turtles8 H" Q' X5 B4 k) }0 ~, {
set-current-plot-pen "grass": |) B" l& R" p) D
plot count patches with [pcolor = green]' o2 T* L% x0 u$ q. n f3 }
end7 }6 x: y9 {7 s6 }! J2 W
可是运行时提示no such plot: "Totals"5 R6 f: |! [+ K
error while observer running SET-CURRENT-PLOT
6 X0 S) q* I# x) G called by procedure DO-PLOTS
" v0 O% X! T% s0 G4 x- y6 B/ o called by procedure SETUP% ~ X( M, R, P1 ?- L
called by 按钮 'setup'
! p( ~9 `9 }, {7 @求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
