我编的程序如下turtles-own [energy], s; |) p+ a% m3 n% t' y' e5 r
to setup/ w& k0 B0 h; F8 b
clear-all% i) \: w3 A, G: ~/ u
setup-patches
2 v% @( L8 w1 s: [% T5 z4 f% O- U create-turtles 100+ o: A0 ]5 E$ a+ Z
do-plots- u J# Y& }' O/ q. J) ?9 X3 P4 h
ask turtles [ setxy random-xcor random-ycor ]+ E2 q$ k, l+ ~1 n7 P
end
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move-turtles
/ @' h+ @8 w D% c( m F eat-grass% K" w, S: p A0 g& f
reproduce! L! m7 e+ H9 s5 c
check-death
0 h' O }$ p5 j: H$ [; p regrow-grass
" W u P. S- y u' Q do-plots
# l1 W, B9 H! S' c0 `/ ]- Cend% ?2 E* p9 r+ e9 F. P! P' C
to move-turtles/ i8 M! `/ P4 a. ?6 Y9 [8 m
ask turtles [
" b+ T+ s+ @* ` right random 360
2 e, R! b+ j, b! S3 q8 Z3 L3 B! S forward 1
; `2 |3 o6 V2 N' L0 u set energy energy - 1
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end
( W, y2 K( C+ i- a* d5 Q7 lto setup-patches. O; `" T0 K$ w7 C$ q: C
ask patches [ set pcolor green ]6 B4 [! F4 A# t# ~4 v% w# W
end
) P ?( ^7 A3 W0 i% P% b Pto setup-turtles( L& @0 W. f& X1 Q) I6 y
create-turtles 100" I2 l6 P6 R. _6 O
ask turtles [ setxy random-xcor random-ycor ]
8 X; U, {2 B7 s) v: F0 Send
2 M6 d5 V# s" o6 \% Yto eat-grass
2 C+ T* y. K) ?$ P: ?2 \& L ask turtles [
4 g6 B! `% T+ C7 G3 R) I if pcolor = green [( K1 s# ]% w/ k' N% x- [% r9 q
set pcolor black! b1 D8 I; \3 {! E1 Q- g' c0 ]
set energy (energy + 10)+ K- n) z/ @% R* H7 {
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ifelse show-energy? A4 \3 j- c: a* r6 U* X, h f5 r
[ set label energy ]
* s5 r5 t; d, W3 Z8 E7 I: l [ set label "" ]
B! P6 N5 H' E6 w ]
5 U5 ~: {! Z) s; u3 L A% Hend2 V# s0 [! N- h& k S% \
to reproduce
. z* G9 C$ h4 Y: ?8 U$ U. ? ask turtles [
4 f$ f* A2 p: w- D& k if energy > 50 [" w2 t' \- G6 O* C! `& f8 p! W0 F* l5 a
set energy energy - 50
/ o; b& L2 ^. |0 F hatch 1 [ set energy 50 ]
4 u, T6 _* ? x# S# O ]
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8 v+ J/ y7 b8 J" K( R6 e. l# Y! xend
. n5 J, a+ U7 |$ t* [( s3 x2 Eto check-death% U4 ?" y d6 `: g* G/ e8 N$ \
ask turtles [
' t0 M* \/ m7 s if energy <= 0 [ die ]. p! p5 k8 k7 l- k' K7 F
]7 b. J- ?: a, _8 Y; k
end
' u' K8 d- a4 C* xto regrow-grass5 R6 s- K! U; O
ask patches [
5 v8 n4 M0 S* x2 K r8 N0 _6 t" m if random 100 < 3 [ set pcolor green ]
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end `$ ?3 ~# S$ O s( o9 A* h
to do-plots
' Q/ s* @& q M1 U7 k set-current-plot "Totals"
4 K+ u& Y4 N$ g* [6 h; V5 j set-current-plot-pen "turtles"
9 l5 M2 y4 }, u) N5 M plot count turtles
& h) s: l7 d- L5 R4 F9 G! p" U/ Q' C set-current-plot-pen "grass": B: X* I! m* H# {* L* {: h& n
plot count patches with [pcolor = green]
, g. H [5 j$ Xend* S2 V) i3 V8 g, c
可是运行时提示no such plot: "Totals"
3 ?1 q7 b4 J! uerror while observer running SET-CURRENT-PLOT1 h: I9 q; e1 c8 ^: r4 u1 f& x- U9 q% Q, L
called by procedure DO-PLOTS
) Q! O/ W' i4 } called by procedure SETUP
" {* B) M0 A9 u! ~ called by 按钮 'setup'# `. J2 e* G1 _" B
求大神解答啊 |