我编的程序如下turtles-own [energy]7 z4 ^) M9 f q1 l* T& S
to setup" W/ ^5 p, i9 g' W u4 o
clear-all
Y* W1 l' z5 R1 C7 y. u setup-patches8 D; O- r0 D: D) p5 Q" g5 P
create-turtles 100, S" t# W4 G6 `7 L% l6 X
do-plots
8 N' I0 K/ u3 q( J, O! m ask turtles [ setxy random-xcor random-ycor ]
7 |- T8 s: N/ Z5 q2 qend
0 f% J& @+ S K. pto go$ B( a8 r; \5 A, h
move-turtles% C) t0 ^+ l! ]7 q5 N/ p
eat-grass) v4 f' W% n( y2 b/ {7 {
reproduce" M, O" D2 d% ~1 v3 Q
check-death
) v7 r4 c6 U/ @$ S1 G6 q4 h regrow-grass: u1 a* f7 k; {; {/ r1 O
do-plots
9 [% h* I% s1 c) h& _end( q& j7 q7 r* n
to move-turtles
$ h9 N3 s6 ?3 i4 J. _, h6 R ask turtles [
: v+ E/ q* x5 y$ `' _1 e+ Q right random 360
- m4 D' V8 T* v& o forward 1
; c% d8 T! Y' [- f1 o set energy energy - 1
0 t& I# B1 A# n2 _; ] ]
, V2 ~" v m9 z* h+ Kend
% w) U0 c% Q* N8 v8 p9 |$ pto setup-patches
' `7 c3 A! K a, m: M9 V9 R ask patches [ set pcolor green ]
) I2 w, M7 H& V( s) mend, M/ y' C0 c3 g' B7 F" N, D6 z
to setup-turtles
6 ~2 a' W( I( ?1 M: z2 L9 [ create-turtles 1006 m8 j7 z7 F- Q4 f n( |
ask turtles [ setxy random-xcor random-ycor ]
9 Y% O# n% m$ O' Dend
" F8 d4 f# R" |to eat-grass8 ^1 ?1 k- t% ~( w+ E% [$ \' l, p
ask turtles [2 c: M6 i3 J- u+ e2 y
if pcolor = green [
4 R8 O6 G/ W' z/ ]% u set pcolor black
3 z5 V+ X) d$ R% R+ |0 Y set energy (energy + 10); b8 X3 j8 d) A2 B! Q' S
]
J& X* A+ L8 C5 x- R) x& ` ifelse show-energy?
5 ~' q& W: G, R: F [ set label energy ]3 W# D* u1 ~# U" d- y
[ set label "" ]% H8 [1 X3 Q% N7 c& f- G7 s" S
]
% D3 i: P K: i0 Q1 @end9 V5 B8 y' A( B) K
to reproduce: r3 ?5 T5 I/ ~) O" x
ask turtles [% O- A6 K' w" Y2 B
if energy > 50 [
4 ^! f4 F! }: E1 L: `( `* } set energy energy - 50
s! [2 Z5 i7 S5 `( X! j hatch 1 [ set energy 50 ]- S9 [: f% W; u+ S6 r& o6 g
]
" Q0 P$ R: s0 c! O3 o# M. R ]
; c$ [$ D8 `9 Q2 e% {# K- O Q4 rend
F* b5 u! m& P. D+ n& L: b( @3 A, Fto check-death: f+ n6 B8 v: W* r) \' }
ask turtles [$ @4 S d/ z) }# _- b" Y6 U. S+ ?
if energy <= 0 [ die ]. T+ g4 \$ ^9 D$ Z
]
" `, Q' w( w2 V0 R6 ?# v8 jend
# S& l; I* i* E1 jto regrow-grass9 D. ]! e* _7 L( J
ask patches [7 W% p" L) E2 d u( Z! y
if random 100 < 3 [ set pcolor green ]1 q1 Q2 r% m4 r
]
+ P, A3 V2 x# X, D% Eend( |; L/ e' q& O- {/ k2 a
to do-plots/ j+ G* P3 I: @+ W+ h
set-current-plot "Totals"9 }% h4 _+ p5 `7 D- a3 G
set-current-plot-pen "turtles"! ~, I% M& F; i/ o
plot count turtles
- D2 Y; w2 ^7 k: E set-current-plot-pen "grass". P6 f: f7 P. s6 s7 c: I- E3 @& b
plot count patches with [pcolor = green]
' M6 k a& N. ]: o4 S( ~7 I; ~end
5 @0 r: }6 k* l9 F1 }( U可是运行时提示no such plot: "Totals"& v% [& F' {( ^! q. C0 O
error while observer running SET-CURRENT-PLOT' C0 v" V" | u! _1 C" M; E. V- B
called by procedure DO-PLOTS1 @# o" f$ X( m7 v
called by procedure SETUP- Q9 a7 @: v+ n, \$ m0 [/ b/ n
called by 按钮 'setup'3 J+ I6 g- t5 w
求大神解答啊 |