我编的程序如下turtles-own [energy]3 C1 Z* O7 n; j4 z. y1 e" M4 E1 d
to setup
' m1 |1 } [) j' q7 D5 U8 r$ H3 X clear-all
- }" r( e7 W- {; x. h setup-patches/ h2 J! Z# ]4 V
create-turtles 100
# H2 h: @7 M+ v9 O+ P do-plots
4 M5 u" V4 I4 i3 z( s ask turtles [ setxy random-xcor random-ycor ]( o! y: B' ]; R% [" y4 |
end
. N4 i) c" a G0 J% }* Sto go
* p, z' t0 m1 L move-turtles
8 ]5 G+ K$ h* j& c1 R eat-grass
' [/ D5 X7 E2 I4 s6 i4 X9 ~; e* W) l reproduce
3 U! \# G; K1 x# z) ^ check-death
1 m7 j6 P6 N2 c% I" m regrow-grass/ _+ T; O7 r- C+ h
do-plots$ ]; q- M, z7 k1 i1 I
end
* H9 _$ [/ U) Q6 f+ X7 Zto move-turtles
. S) z4 H5 r% b- ], G ask turtles [* _3 B9 z9 e1 ~( v) O0 c2 }
right random 3608 N3 u8 T5 G5 q) h( C
forward 1! b1 }6 G8 ~5 u) ~5 B
set energy energy - 1
. K" F U. b& D& o ]
0 ]$ k" g5 x) G; Rend
# R {2 u1 s% R& J, zto setup-patches
% e: D% j3 C1 ?! p6 \ d ask patches [ set pcolor green ]
. |6 J( d. R& A) G2 Q4 F; k, _end
- _, A: Z1 c1 `' {2 h: K; B( {, h' T% rto setup-turtles
6 } x# G) H4 s9 p% { create-turtles 100( z5 ]: g) I- w+ \$ k
ask turtles [ setxy random-xcor random-ycor ]! W' Q4 [0 R: R [+ C1 y% ^
end ^" ?7 t7 V B% F1 B/ w
to eat-grass/ e$ c! d: n2 v3 |! r
ask turtles [
: z$ x2 o) m1 v0 q' T/ _* U0 } if pcolor = green [% H$ m* N' G5 Z
set pcolor black
/ H' L- e) f, x8 v& Z4 P6 N5 w set energy (energy + 10)' b/ e; y: S; X
]( E) R2 P/ u. ~1 Y& [: M
ifelse show-energy?- U5 v3 y5 t6 M7 O8 X( Y
[ set label energy ]
* K( d* v3 I" f s [ set label "" ]
* z1 @6 {7 G4 l) _: J. B* m4 c ]
& Q8 Y9 t$ e# [' z0 n! C# oend
3 y+ {" w; q! L; L+ E( P5 P. \to reproduce
4 o3 \ P! N7 Z- ?% K, p* t ask turtles [
% M$ w j9 }( M: s A% d/ Z1 G if energy > 50 [
! I% r0 p ]& X* h/ d$ Z7 W set energy energy - 50
, F- O. Z {' f4 i8 W E' t2 I0 B3 Y hatch 1 [ set energy 50 ]- G5 q4 `6 {! ?2 M$ ^' j! L
]2 p9 [; N: G+ j% S6 ~4 L
]
+ f G4 U6 `; ]% T1 v/ l4 v9 ]" G) W% Bend4 _8 i) ~& Q3 ^) }( E0 h
to check-death
% A5 ?/ u) k9 Q2 F- B0 k# p1 W; q ask turtles [
5 i# L9 o$ H' j$ M if energy <= 0 [ die ]9 C& e4 C6 @2 R7 _3 Z5 {; y) }# v
]0 N5 q. n& C$ |/ Z# z
end. w3 F& |6 ~; @+ I6 ~% C
to regrow-grass( ]( O$ w* w6 \
ask patches [- m# F2 `' p8 ^7 O/ j; F
if random 100 < 3 [ set pcolor green ]+ f4 m2 S4 G9 m) e. _% ?
]( G- T# T T* o. z" ^
end; w' ^& M1 A1 r& d) s
to do-plots
9 Z- j" n3 P7 A0 c6 u7 L( T6 y set-current-plot "Totals"4 ^* b9 u# s! D) F; d& v% k" B9 F
set-current-plot-pen "turtles"; | z9 M" l. u! c. Y2 [! B8 q, a
plot count turtles1 }1 ?; h1 ~. V- Y0 ?5 q5 ^
set-current-plot-pen "grass"
1 E* |' _0 b1 R" k1 C plot count patches with [pcolor = green]
& }% I# b, c; Q7 Q% @end
) c& i( L6 ?9 g0 Q+ z7 _' H可是运行时提示no such plot: "Totals"" O! D) z$ a% u5 U
error while observer running SET-CURRENT-PLOT
% T; U( j$ {/ M. {2 t called by procedure DO-PLOTS7 o0 d# D. e9 G
called by procedure SETUP
- u" u' f' |. _2 n0 ]# T) s called by 按钮 'setup'
$ R7 \) v- A( g/ x: j/ {& r求大神解答啊 |