我编的程序如下turtles-own [energy]
- [2 S9 u' B, H5 n& rto setup- q$ R$ s0 D( h
clear-all! c1 o9 ]( G" h* q9 q3 D4 R* L
setup-patches5 m- V) h* t4 S# P% o
create-turtles 100
/ g1 r1 {; |4 _* p do-plots) p4 r, U7 P$ h, B% k9 l9 R- S( l
ask turtles [ setxy random-xcor random-ycor ]2 ?, o1 y7 B! l+ C4 F, E8 a: u
end% }* V& j) j; j) V
to go
0 H& j* q4 k$ N1 Q6 P! Z B move-turtles, G/ F/ I& ~' L3 C# w
eat-grass# ]( m2 `3 d' e4 ~
reproduce- F) O4 o0 y7 b- H+ a
check-death9 X/ p$ A$ U |& L; ]
regrow-grass, T$ f* ~3 N9 f; \# E" P
do-plots9 Q' `, W$ a0 B# W
end
1 W9 h4 B6 N5 Oto move-turtles
4 C, a I0 c6 p. y; _ ask turtles [+ e! M/ B. [) @1 u$ e
right random 360
/ S$ }# M$ L! }9 R forward 1; E7 _) ?( c9 W, @$ R
set energy energy - 1
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end
0 e+ \0 W; z6 |3 C. Hto setup-patches
: [" g; F h+ v* b ask patches [ set pcolor green ]
8 y6 O/ t: R4 u+ H- `! Cend6 q& D' L K+ g/ I! E: } V/ w: q9 P
to setup-turtles
# x* x: r* z# T8 j7 a create-turtles 100
7 f8 I$ G. ?0 A( [4 b9 b5 a' I ask turtles [ setxy random-xcor random-ycor ]
) M4 \$ X* S Mend
8 S0 s6 T" {4 F: S. w* q2 v4 `to eat-grass% z! U# x) o( Y a& O0 u. _
ask turtles [
9 I$ k @" Z1 o5 o, ~4 Y K( x if pcolor = green [
4 Y+ k! Y2 I7 j% X9 ~ set pcolor black" p- \" S" V4 c* U1 N
set energy (energy + 10)
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ifelse show-energy?
1 p6 s5 O1 _+ ~: I# P [ set label energy ] o( o$ p6 ]0 Y
[ set label "" ]
0 P) x4 u4 u) b/ P# m9 p+ _- k j ]
3 S- E, C) P* n" B/ r, h7 Y7 Jend. [) Z$ }! y- A2 l$ G2 L
to reproduce
8 p, f+ B: a6 q ask turtles [% A' w, |/ s! V( c; O9 [* A
if energy > 50 [/ ]" ?4 K% x& x. e& [
set energy energy - 50
; {0 ]: l" W# a$ j hatch 1 [ set energy 50 ]& S6 ~4 {4 K, Q, U7 b5 r, o2 m
]& s" i' Q! z' g
]$ `8 Y. ?& P3 _: S8 V" M6 E
end( G" N# M5 c% p! h; a
to check-death( l6 Y& H* O% S/ i3 M$ y! Q) d% c3 z7 a
ask turtles [
: p: K5 ]" o% Z) o: d7 m if energy <= 0 [ die ]
2 G4 A: z+ o8 S. w% E ]
' A5 R' M0 q# |: n$ T: v# m6 j! Eend; J+ U& t, d+ p; u, r
to regrow-grass% D6 R( ~' G5 {
ask patches [. K+ F9 ]: L7 o; m5 O$ }3 N* X
if random 100 < 3 [ set pcolor green ]
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end; c/ ~ h, R! Y+ _
to do-plots
" X/ e- [/ V; A' ~0 ]7 o& O set-current-plot "Totals"
2 b9 |1 k& n1 F) t& |4 }3 K* _ set-current-plot-pen "turtles"
5 w" W/ @- x: D3 e( e- i6 c plot count turtles5 o3 T! Q" S$ J0 B( V' G4 B
set-current-plot-pen "grass"
8 {; f# R \$ c4 t1 Z5 h plot count patches with [pcolor = green]
: g+ D* d8 I t7 s W" oend
* w4 _6 r" p. [, p1 m可是运行时提示no such plot: "Totals"
" k! k- ?# I" \: |" {error while observer running SET-CURRENT-PLOT
9 t# n8 O/ u" e% c/ z called by procedure DO-PLOTS, R+ b) S7 N( @
called by procedure SETUP0 B5 x6 G1 p( [& U' l
called by 按钮 'setup'
6 j& Y+ H$ _& p9 C. g2 \5 n求大神解答啊 |