我编的程序如下turtles-own [energy]
# u5 f. M4 m5 R8 I$ l) a" bto setup& g) p& \7 R9 p$ t% T
clear-all
, J- H1 U5 C% z6 \: \ setup-patches
2 m$ B- B+ Y, ]8 x2 L create-turtles 100
; q4 |! E' Z/ w, O: Y* Y G do-plots* l$ \+ E9 q V' u3 @0 ?4 |
ask turtles [ setxy random-xcor random-ycor ]' K) J6 ?2 L% I- q8 I
end
8 i- _) ~" ^4 N; Oto go* i( T9 i( c$ k- {5 J) Y# |( x
move-turtles. k6 k: q& ~- @/ J* T
eat-grass4 A6 I4 ]% z; ^5 m1 e
reproduce1 } v6 e( b* n( W) D- c: j. h7 B
check-death
8 @" Q$ t8 @2 ?% E5 [+ @7 z regrow-grass
- A* z; w `+ }2 o) k% f# }, A M8 Q( [ do-plots" G: E+ q8 }" B9 g' n8 T
end' V, Z& K; y1 {$ T; B- K
to move-turtles
: V; T# s4 e1 T+ a" q7 G" c ask turtles [
) _5 x2 ^" |. X- }* F6 ^6 i right random 360
. j( p7 M4 Z/ O0 Q7 D1 V) [% C forward 1
Q* W W" T4 K+ x, |' n set energy energy - 1
, F5 b9 L5 s/ f ]
$ I( ^1 }0 q( { ^% L* ]end
5 K' }7 W E/ F2 j9 I& N8 ito setup-patches
# d/ y, O+ {0 n N5 ?8 | ask patches [ set pcolor green ]
- n B' r6 _3 {# Fend3 b p) R" c0 d" H
to setup-turtles
, Q- e! X- }7 X5 }* F* ^( z0 @ create-turtles 100
; z: o2 u3 L* ~: q ask turtles [ setxy random-xcor random-ycor ]
3 d2 Z, O7 p, \ `& V" vend" n5 ]6 N" p$ _. V; B- |9 x
to eat-grass% A! d! m' V0 ~, P/ v) ~; v% a
ask turtles [
, l- N! j6 q) a4 Z) t9 V if pcolor = green [
: \7 N4 A8 ]' g% r set pcolor black! y4 K7 e& R0 [% r
set energy (energy + 10)* ^" L2 F; q% W1 n
]: `9 ~6 D6 D1 v
ifelse show-energy?
; N% i: t1 `9 T: h8 u8 F [ set label energy ]& E& O! U# a" M7 {
[ set label "" ]5 {% b/ ^$ C a( C" R% q; T
]' S; j( B7 O! I: B
end& x! n( ^" V+ K9 G3 e0 y! c
to reproduce" o2 G5 |( s: J' s0 h
ask turtles [
s9 d- I6 s- } R1 ? if energy > 50 [% w8 ?2 I. @7 a0 d
set energy energy - 50( _+ O' H) R, I. i6 V( @) q* j
hatch 1 [ set energy 50 ], G, f9 q4 G. p R; b/ t
]2 h3 n/ B* V! {4 s
]0 ?$ p8 K4 f0 P; p
end
* f8 L) T% b7 I- J, uto check-death/ n' r7 M# p- K4 Y; G5 b2 b& c2 B
ask turtles [& [0 ?% p9 C6 I* i( n9 r4 s( U
if energy <= 0 [ die ]
* s: [% A0 ]' \( h! y6 p- B' | ]
/ Y8 f6 R- j" V Aend
1 E1 F2 c/ G% Z# Z1 _2 ^to regrow-grass
|5 l! I7 `8 j ask patches [
- W5 V, ~/ f' y4 Y4 | if random 100 < 3 [ set pcolor green ]
/ L' @8 K0 H; U. E" J7 X; P ]/ w8 r7 ~, D- O% D& e1 E- [0 y$ q
end
) T9 F& @; P. x5 Vto do-plots$ v7 p7 k0 ^; k/ ~
set-current-plot "Totals"
0 n9 _" n K4 { set-current-plot-pen "turtles"0 G% k+ C8 C3 U. Y% t+ P8 f; b. J, Y0 J
plot count turtles- C0 e% [% T6 U2 I5 |- c
set-current-plot-pen "grass"
+ V. E7 y, `2 m( Z2 U3 ]) m plot count patches with [pcolor = green]
0 o! Q4 h0 U m& A: Mend
" l, l' \# j* a! ^" Q5 X可是运行时提示no such plot: "Totals"
( ~8 Z w/ k a- Rerror while observer running SET-CURRENT-PLOT
0 y$ U, t& W t# _% [8 P5 W called by procedure DO-PLOTS2 p; v1 M& _* }0 z
called by procedure SETUP' N" d3 a, g- b- `& t# U
called by 按钮 'setup'0 g ]$ F2 B' L- M! w2 g
求大神解答啊 |