我编的程序如下turtles-own [energy]9 h: k" h0 l! d. w7 y
to setup
) p: e8 X/ l6 S- X clear-all, R; H+ D' z' V" G4 u+ r1 P
setup-patches
) a) [" [: H' E# { create-turtles 100' T; Y* c0 t I. e
do-plots5 l5 s& X: b8 K! k: ?
ask turtles [ setxy random-xcor random-ycor ]' b: ~8 R _1 X% i; a
end
( t' `& x, T. L0 D$ eto go
9 `7 C2 k2 y3 e" T move-turtles4 R2 n+ I& K7 j5 z- r0 L0 x. M
eat-grass# U. o$ [; U9 f3 a$ f* G" y
reproduce3 ~3 P7 {1 A) c2 R2 n5 z
check-death
( [% C; ]& a# U1 V( c/ g" g regrow-grass
3 R! V9 G$ u. R$ G) T( p" s do-plots( J8 u+ V B9 Q6 S. W* h
end
H9 U, i. D, U4 nto move-turtles# m |# v) C2 F: [
ask turtles [
9 {7 V, [' K7 `7 ^: O4 {# K& T- ]& N* S right random 3607 h5 C& V' y) R' g+ O2 ~
forward 1( z; X6 f3 m1 U9 D' g
set energy energy - 1
; m8 g |. ?" A7 I6 O# |& m Y! w7 { ]2 ]/ Z8 z: E$ i, ^4 u+ x
end
7 R3 P1 |3 i# sto setup-patches6 U! `! b# C* U$ q' D" [& u; u! j
ask patches [ set pcolor green ], G. P1 P- t: B; m9 W
end* I9 }! D; d: z7 ?: G' ]
to setup-turtles9 L8 _5 j7 @4 O6 F
create-turtles 100: s' T8 R0 Z* m# B, U/ I0 E
ask turtles [ setxy random-xcor random-ycor ]9 A& N3 @. Z- e: _9 L3 g
end! r" V5 Z; p& |1 H" \, J% b& t
to eat-grass
0 ]; e, m( j2 Z6 L ask turtles [. E& K/ a: o6 d- v
if pcolor = green [" N2 m& _: n0 I% z
set pcolor black0 a, L1 J! D- j" T/ m" J! O- B- }
set energy (energy + 10): W/ C6 ~) X6 K- q
]
. k+ G& B" [- ?% P0 N- a ifelse show-energy?5 ~! @2 i6 G# s% w6 @ w* N4 }! V
[ set label energy ]
1 `* J! B2 m. w+ A [ set label "" ]) H: g+ N) d1 p* _$ i/ L7 I* m
]
3 z! N. e2 ~! \end6 q- m! q& ?, W- y( [ W
to reproduce
7 Y3 J* ]( h0 K' o+ l7 Z" g; W8 ] ask turtles [
% _2 B# o2 Q* m* I if energy > 50 [
1 J9 `; i* s& K. u6 x$ ~ set energy energy - 50
. [! k V; S" z+ t hatch 1 [ set energy 50 ]
3 _) \" R7 d" k4 B1 S6 D0 |" e( } ]
! J$ }1 G* c; R0 q2 v& O- U& m' i ]
1 P4 m$ V! P, ~6 V$ lend3 }2 L/ }1 `& ~& l" K! g
to check-death
8 C' y+ A7 U/ A( d ask turtles [
, J |# @. A# O6 f3 b( P5 b9 P G if energy <= 0 [ die ]) J2 z) }4 }7 J7 S0 I
]& |9 j3 L* G2 }+ `0 h
end
4 W* m3 r% F- V( W! t5 Rto regrow-grass
# k' @& t4 R% r4 p+ C ask patches [
! t9 d2 e) j7 A1 u if random 100 < 3 [ set pcolor green ]
3 [3 A# { L/ t* W ]; O# H$ D/ J4 b: l
end* Q6 c& u1 c+ Z( l$ [8 _( q
to do-plots
3 ]: l' |: s2 ^- d set-current-plot "Totals"
$ s# }. s9 |" c% G& g m set-current-plot-pen "turtles"
( W$ Q! E8 ^& f. |) c; b% I# Q plot count turtles
! k* b9 ~$ B3 e6 p' T* q set-current-plot-pen "grass"
. T; o2 f* ~3 q/ W plot count patches with [pcolor = green]
6 a& ~; P0 Y5 q$ send# m7 u& E0 h" ^
可是运行时提示no such plot: "Totals"
0 {: d" V: L6 h2 q1 r: i0 _- C" Y I, merror while observer running SET-CURRENT-PLOT% y0 s z) ~/ Q# P
called by procedure DO-PLOTS
9 k% J% {4 X) M6 _ called by procedure SETUP4 P- r$ q9 a+ `# x" x
called by 按钮 'setup'
5 l9 c7 K( ~* r% U求大神解答啊 |