我编的程序如下turtles-own [energy]
, r8 b7 b# R$ h Zto setup$ e0 _- z* m% r- P( i- ~# A/ p4 d
clear-all
& V: q: w6 ?5 o& v: X setup-patches7 p* y4 ~ K. s3 d
create-turtles 100
' \6 \/ R5 v6 e0 ?4 F do-plots
! R; M0 Q b C" W9 t U ask turtles [ setxy random-xcor random-ycor ]
0 E# z+ E$ U( }9 B1 V( C# D5 uend n( p8 k$ \2 l W" A+ ]( w
to go/ a) _4 Q+ R1 a9 N
move-turtles3 F. G) `, r: R
eat-grass$ _+ z" Q' P# O
reproduce
, K$ |5 {# v# i; R; D check-death n" D5 D$ y1 s# V
regrow-grass
4 W5 w; Y% G8 g$ R+ } do-plots- @: E% S- s g, q) O7 n
end8 G0 d8 |2 ]4 U7 t' a& W9 V
to move-turtles- Q+ s1 D% f( l0 H- x/ m
ask turtles [! h, V$ s( j2 t. P$ P* R
right random 360! P6 G: O! q* y
forward 1
3 A8 l9 Q/ D& G) I" F set energy energy - 1) R/ d+ B0 a5 g6 s0 n
]
5 b; c1 ^0 i! L$ l( ]" Wend
3 k$ D3 {' {7 nto setup-patches
7 v8 x4 N' r* h8 [ ask patches [ set pcolor green ]
! f) T. r2 Q4 t, z- G4 |, Xend
- g9 E( a; }7 n4 u8 F0 Ato setup-turtles2 s, i& G0 _( C/ ]0 J# L
create-turtles 100+ v; z, W( i- I5 Z! d3 F* }* Q
ask turtles [ setxy random-xcor random-ycor ]
, p6 o; S% x5 _3 x) s rend
$ n$ ?8 T5 I0 W, @' B$ _to eat-grass5 d7 | j; j8 F2 C) s( q
ask turtles [
) {# b# T8 R' X+ { if pcolor = green [
4 ?! b. I# S; }( A- G6 G" M, b set pcolor black& k+ V; V! { p5 C3 B# X1 p' Q; _
set energy (energy + 10). W+ K# U6 V* K5 v8 L1 I
]: e/ h, i! N# \. W; m
ifelse show-energy?$ I. p' W5 b( `
[ set label energy ]
# D' n4 q) }* J/ O [ set label "" ]
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end
+ Z) a; v, t% G& F& M) Cto reproduce/ x/ F C8 D8 _) i1 v y0 f
ask turtles [ c- p4 X- V7 w( ]
if energy > 50 [/ `3 V/ ]9 Q* d; k. ~& b
set energy energy - 50 ~! S6 x' J$ \2 k0 N! f: a
hatch 1 [ set energy 50 ]# A7 {" `5 ~3 i9 l% k
]
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end' C' ?1 k: K) Y9 S# G# M
to check-death
, I1 \, C: L/ F$ H3 D: e ask turtles [0 q4 t2 ^0 q2 w/ U
if energy <= 0 [ die ]- O; d2 m: d X6 }" i b4 o. R
]
$ [, L: E: y d$ t r& u* Pend9 U& u8 _) \9 a: g/ R
to regrow-grass |* \9 ~- Y+ s/ f( k" z
ask patches [: a& d8 Y9 j: F" e ?% h* g- H( A
if random 100 < 3 [ set pcolor green ]7 V7 T! }% `3 B4 I- e, [
]4 m o, ^8 G. |+ f" x& n& v- w
end( r9 ? w h K& O9 S# C
to do-plots
8 v9 q/ i! |+ ^3 `+ r& Q set-current-plot "Totals"
4 B, Z& D* H/ l% H set-current-plot-pen "turtles"' t9 X S6 X2 h. v1 \
plot count turtles* T+ ^6 a5 h T5 L# |1 p! u* Z$ c; p. M, ^
set-current-plot-pen "grass"
& O- x# |* b8 A v& @* t& ` plot count patches with [pcolor = green]/ P+ Q% F$ {* _# i5 r$ v. S7 H
end8 y# N; |4 Q y) L! H. E
可是运行时提示no such plot: "Totals"
+ b* `+ a/ r9 x& e yerror while observer running SET-CURRENT-PLOT+ W* c2 U) G, F$ E7 L8 s& }
called by procedure DO-PLOTS
& t) [; v1 r6 G) ] called by procedure SETUP
5 M" V2 p W5 |+ p3 b" k" G* N: y called by 按钮 'setup'
! p$ |! C/ b( @ s求大神解答啊 |