我编的程序如下turtles-own [energy]
4 R( Z# T& e/ ]% y% eto setup- a* b3 O4 ~! S' }% z" J" J {
clear-all: k# O$ M# y. C/ O0 Y
setup-patches
, @2 e7 S7 ]. f8 C create-turtles 1004 A3 \; s+ h6 Z$ d1 @1 x# ?9 }) h. o; ?
do-plots t, V0 } E' E9 k) C6 ?
ask turtles [ setxy random-xcor random-ycor ]0 Y& p$ ?/ m4 Z" j7 |0 S
end
7 Q' v u9 d+ G% Y+ S7 Mto go2 b5 {* Z4 z6 j& l
move-turtles+ Z+ M; |% N% K5 a; u- n4 X" d
eat-grass H5 j. d6 {) l4 y) f! q/ L
reproduce
. ^/ s F6 V( G6 H# _* x8 B# ^ check-death
9 g. N- E0 @/ Y) B1 @! |5 V8 G% { regrow-grass
9 t! S8 ^* N8 f3 R do-plots0 ]0 i y$ z: u8 H# |) J: K
end
' `. u H( W7 ]+ ito move-turtles
$ T5 c' e# F4 q* v/ A ask turtles [
- l* q$ Z- b$ T V right random 360# q4 n1 ~. E; V% E! t: r
forward 1+ } f6 k) ~4 @- N# R
set energy energy - 1
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end
( i- ?3 z+ e5 j- t0 H. Rto setup-patches" T ?7 T c- I7 s$ v3 l" L* ?
ask patches [ set pcolor green ]
: J) S; j6 \ x6 s8 n0 Wend
+ b0 P, @3 b2 i2 j9 K7 zto setup-turtles: p8 w; e5 R# ?, s1 r% q0 d
create-turtles 100
5 @& z& o5 D3 M9 f+ R2 D) `% m ask turtles [ setxy random-xcor random-ycor ]
# K& J7 c8 X Pend
8 q) r; o/ a% N" Yto eat-grass N, W# q b0 C' E
ask turtles [
t/ h$ o% N/ ` if pcolor = green [: Z# R; }8 C0 j5 [
set pcolor black
5 A. x6 ~$ y& q) V3 \: g/ d3 ~ set energy (energy + 10)
# k! U, t+ q! W5 o( K( m ]
' q" O7 \1 g2 ~ ifelse show-energy?
* P# ~! y7 A* v6 h8 ]; j! W [ set label energy ]# f1 U0 R9 b$ m4 U9 U) F
[ set label "" ]
- {# i& ]& r% F8 W( j, z ]
. \) j9 r$ S! x P! }& z0 eend' {! G# _8 h. F2 h$ g9 k
to reproduce, K5 }7 P& l" R: C
ask turtles [5 F6 ]1 Y) ]5 A0 L! q, V" L) `
if energy > 50 [
# ~% e9 T$ e: n set energy energy - 506 k$ q Q3 H0 m; Q. ?5 e8 g
hatch 1 [ set energy 50 ]
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]
8 {, B2 F% a0 E: Tend8 }7 b7 e2 @9 t9 g4 N9 e
to check-death
$ Q& B/ e2 C8 [2 Y" }1 ^' o0 U ask turtles [
8 H/ [1 i- a: v% _ z! [ if energy <= 0 [ die ]8 v l" ]4 X ]0 w- A
]7 U2 J5 p6 U) e% W$ y
end
8 p; K; o1 N/ A, dto regrow-grass) ]2 u3 p6 H2 A6 [1 D- x& g& r! |
ask patches [
1 _& E1 ^4 j$ n' p if random 100 < 3 [ set pcolor green ]- Y% Y) y/ w7 J' `
]
7 b Y# L1 b2 r2 q1 Q* ~4 `end
, S5 L) A8 Z% H* s6 A: D" K! Kto do-plots* `3 I" o: p$ F9 g5 w
set-current-plot "Totals"
3 W+ w# K* b* d4 s% Z set-current-plot-pen "turtles"
( I; u+ w8 q6 d, s9 u8 o# o plot count turtles1 H3 w6 S- w* T/ W9 w
set-current-plot-pen "grass") n! p0 B5 J' V* y* G. L
plot count patches with [pcolor = green]6 _9 G+ \# u9 }: f- J# w1 g, f
end' h- o9 B6 F& O C* M. r
可是运行时提示no such plot: "Totals"( K/ w: a, m4 Z7 o, K" [$ ~( @6 p
error while observer running SET-CURRENT-PLOT+ X7 C9 w) E3 `8 n- G, Z* r
called by procedure DO-PLOTS O2 G0 e! a1 H% G7 Q3 k
called by procedure SETUP5 x& y6 u. L. G) {) P4 F
called by 按钮 'setup'9 }9 L2 h8 f' I1 N1 D! C5 o8 D
求大神解答啊 |