我编的程序如下turtles-own [energy]
2 w+ O" y4 B: X! B4 wto setup
! N9 L+ a( o( v! f3 C: G clear-all
* ?, \4 N: ]7 |8 B2 i" ]. d3 H' ]$ e8 { setup-patches
3 t p! P1 W& M C( N/ t5 h( Z( Q create-turtles 100
$ h6 P8 ]) R, Z5 X* r8 | do-plots
' ]* D1 p- l( ^8 `, I" V- a! D ask turtles [ setxy random-xcor random-ycor ]
: Z* R% K; j: @& `) Hend. y1 C% r" A& [
to go) D8 J j+ \1 k4 t
move-turtles/ t' N& x5 P) n0 }
eat-grass
' ]0 l0 X0 C6 v1 H8 D' b reproduce- P+ `1 E# V1 T) T& e0 `
check-death/ ]0 h( Q; f8 v; w* V7 P- S& `
regrow-grass5 _! q' ^5 H& ?( e
do-plots3 s# V' @% |: d9 y. w& ~: P
end7 f+ k# r9 o! ?$ A: t
to move-turtles/ U O& l$ A4 F& X9 c' ~+ c
ask turtles [
: ]& e6 [+ |7 f7 N right random 360! o. |, F8 X, n: @2 Q& ?/ E' k# r
forward 1, x1 h& {& A7 d h, Q
set energy energy - 1
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end
5 ?8 H+ q3 M% R% s) i7 _to setup-patches
! u M# ~7 |6 W; M ask patches [ set pcolor green ]) ~2 S: B) ]! i5 ?. M0 }
end- m3 x+ F c+ z3 Z( k4 X
to setup-turtles3 L2 E: T5 C$ a- V! ~( G5 _
create-turtles 100
0 v" \ S+ ?& I1 S0 j8 q ask turtles [ setxy random-xcor random-ycor ]
9 d! H1 v8 a# Hend
: z& M& }1 p; _% l/ jto eat-grass
) v! |, N& _: c ask turtles [
9 J* C0 P- l, f, F) R if pcolor = green [$ }5 h0 M9 Z8 v0 ~$ g8 D
set pcolor black
' v( {1 t, j' n& P; Q) x2 p4 P( s set energy (energy + 10)4 {0 G0 f [- h1 J, U+ J
]( K0 _; }7 q/ S. Z( ]. E( B
ifelse show-energy?) |+ E& i1 F3 B( e. d- W- r
[ set label energy ]
6 D+ S, A* M$ ~ [ set label "" ]9 J8 Z& i5 J1 `# B
]
0 I3 e, y+ K) M" ^. uend: k+ p. e# ~, z4 H! y) N2 @
to reproduce1 w+ M, F" S( o7 H/ H! f
ask turtles [5 A6 Y4 y; d% F( |' T
if energy > 50 [$ y$ }: S6 ~* {! P* {
set energy energy - 50
- ^7 _; M- Z5 s2 S1 H! U& ` hatch 1 [ set energy 50 ]
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]
* {6 l7 x% S! u0 Yend$ l6 k% ` [4 U% x r
to check-death+ V* u i+ R) S
ask turtles [
* i9 W# n. T- q0 I if energy <= 0 [ die ]3 b3 U- I* x' o3 U* z& ~/ R3 X
]0 T( ^# K7 E$ }* k& ^8 A
end" v6 k. q( B1 B1 G, i$ J7 B& C
to regrow-grass2 T5 _: Z! a4 f6 o5 q ~
ask patches [9 m! {( p5 H9 Z9 q0 n3 K/ _
if random 100 < 3 [ set pcolor green ]) H+ F- z: C9 o7 I; m# S% R9 ^
]1 D9 ], L1 w3 i% B3 j! C
end' O# \5 `) \; N- n
to do-plots# n# A: q5 W- m
set-current-plot "Totals"& z% {. G# t4 Y; i
set-current-plot-pen "turtles"
4 s# S. z7 ~) }- ? plot count turtles
! Q* l6 r* z* _) M3 U; L set-current-plot-pen "grass"+ k2 n6 d3 J8 |/ r7 N$ y, \/ B
plot count patches with [pcolor = green]- n, ^+ |. X4 [9 p2 I4 z# m2 G
end
1 d; K" I' l, V* v5 A( |' d可是运行时提示no such plot: "Totals"
( m Y) p# F. S2 D5 A% ?8 i3 Aerror while observer running SET-CURRENT-PLOT
3 j- [3 I! L, S5 l* H- y* o8 L( D called by procedure DO-PLOTS8 {, u9 Z2 r0 q4 r. e* y4 ?7 R
called by procedure SETUP
# T4 v" j* ~ V! X called by 按钮 'setup'8 l J& B3 C/ V M4 z8 C% o
求大神解答啊 |