我编的程序如下turtles-own [energy]
8 K2 p+ A' u# ^; ^% k5 d; Vto setup7 a* G" F7 b) X# {
clear-all, o8 K m! g# H4 J5 }& x2 S
setup-patches
0 Q- Y/ i9 G9 W: _+ V6 i/ D create-turtles 100
3 ^3 B# F2 c; e8 I& b. e do-plots1 A$ Q. E7 T% Y. b
ask turtles [ setxy random-xcor random-ycor ]
; X3 L- t' c9 R+ Dend
0 b- t M( \* C! K- h m" {to go
2 T4 [; b6 H0 F! q move-turtles! S/ H1 x3 `: R8 z
eat-grass
4 ]% Q* b( L% f) d3 F3 ^ i. I reproduce6 G6 V/ y2 J5 r
check-death
5 t3 J% `( T7 ~/ n# w regrow-grass- b9 J5 n' {, ]+ c+ M
do-plots
( ^4 U( c: c {4 Qend/ g Z! F1 x9 M% n7 o5 @$ ?9 a5 s
to move-turtles: [6 I1 m2 p9 e h
ask turtles [
+ W7 v! o( t. ? right random 3606 y8 e; B3 x7 G
forward 1
* K+ w' d4 n5 u8 }3 X0 z8 K set energy energy - 1
% U/ Z- T/ M! c5 E4 } ]% ~' K. B4 C* q* f0 l, I: Z
end$ X# i- l$ A* M% \3 a! O
to setup-patches4 j S J! `+ |, j8 A
ask patches [ set pcolor green ]- I) K6 `9 e0 f9 D; ?
end
+ b. k" o' a- S. Y; u9 bto setup-turtles
% ^* `6 \: l- W7 L create-turtles 1002 W5 W! H/ p% y% ~. e1 f
ask turtles [ setxy random-xcor random-ycor ]
/ G" M6 i( x3 w5 c- send
3 e: _2 B& o) o8 m C& yto eat-grass
4 g7 e; M0 T. z5 b$ _4 \! i/ L ask turtles [) j, Q$ E0 Y U( ]9 s, I* `/ [
if pcolor = green [4 \' ?' m2 Z# d/ N$ H+ F$ L0 U
set pcolor black6 n' `7 C Y; b$ \8 Z, U5 f6 h5 s
set energy (energy + 10)
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ifelse show-energy?
3 f" k0 I6 j- Y. R: O$ x' J [ set label energy ], w b3 A; D% E$ M' d( [" w- e
[ set label "" ]$ p/ P/ U; r0 P. H/ A! `% b8 Y
]
- _7 |( `2 g- c f" P$ ?4 Mend1 a& f; u4 w, b3 x7 E9 j/ {
to reproduce
+ Q! e) _. {. w1 A- P8 M ask turtles [
0 y* \7 V1 o* {- V* ? if energy > 50 [7 A r- X3 @. @* W: T: w- {5 p
set energy energy - 50
3 B* _" i; s0 l4 k! K! Q3 ?. F' V hatch 1 [ set energy 50 ]
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]: b& V& p% _3 m( a/ l/ ^
end B, j* h0 _7 C) ~/ Z7 O! z' u$ E
to check-death
5 w+ ]& q6 h' w, E' Q ask turtles [- A: t- @9 s* N
if energy <= 0 [ die ]
+ N" H9 I% o9 o( P( a% v, k( { ]
/ C4 g/ C, u# N$ e3 t: I+ q& uend1 w- ^8 f3 Y. m9 B! z1 r
to regrow-grass6 G$ `- U) G; p' U2 a, H9 e
ask patches [
6 k9 I3 e0 C/ c4 R: K" f# b& u, L if random 100 < 3 [ set pcolor green ]% G4 n# t; E: x) p
]3 r* I5 ~4 ^5 u/ ?/ Q8 G) M2 k
end
0 k1 W6 z3 w4 K+ Uto do-plots) U2 [/ k* R7 [3 V0 } q
set-current-plot "Totals"6 J; ]5 h+ { a0 l1 _8 P: H& V
set-current-plot-pen "turtles"
( D# e- L) U* P- k1 Z7 ]4 M plot count turtles
( m/ Q% n! j4 d5 \1 F set-current-plot-pen "grass" g0 V8 P( i' n; V
plot count patches with [pcolor = green]
$ \+ r+ M. O4 M* h! _% }end0 b( ]- T: }. B* ]* @1 E4 {, [' y
可是运行时提示no such plot: "Totals"' k8 W! v4 Z& Y
error while observer running SET-CURRENT-PLOT3 _0 d4 M& r- R" _
called by procedure DO-PLOTS: V; U" m9 m& T. \% W2 L
called by procedure SETUP
, i+ h+ v6 o# ?% H called by 按钮 'setup'
7 v; x' m; b* c! R求大神解答啊 |