我编的程序如下turtles-own [energy]
4 U2 W, ], U* C4 y }to setup
. c( g2 { O: T; } clear-all0 F2 x" ~8 B6 M$ [- {
setup-patches% O- o6 V2 c* p P$ o
create-turtles 100
; V7 K, I5 P4 ]9 Y do-plots3 h# j* ^* u: D; B% \6 a" i
ask turtles [ setxy random-xcor random-ycor ]
5 P6 v$ C( v$ A# B6 s/ {end% B0 i( J3 e. z9 v6 y
to go
1 E- i+ P( L/ ^* i5 O move-turtles
1 e9 x. \, a6 a eat-grass
- I+ ~' A, D3 j# E- c: k reproduce
6 A- W) z/ o( B0 U check-death
# T1 t9 W3 ^1 b6 n regrow-grass
) m: X7 `6 `/ ]5 s9 j6 ] do-plots2 N; I( d7 n( j% n7 R, Y
end$ f1 |0 ]& B& Y/ ^: e& f
to move-turtles
+ v/ g$ i) D/ W4 v& ?9 \ ask turtles [
. X! n; j) ~/ I" _% z& B right random 360% ?* k0 d$ P4 `, A) W V
forward 1( f8 Q" E8 L2 D; c
set energy energy - 1
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end
, i3 S9 X6 F+ w' M/ U# _2 F3 @to setup-patches7 J- s/ n: m" B4 {& B9 I0 g/ O7 r
ask patches [ set pcolor green ]! ~, |! s8 J) S; }! m* x1 e
end$ K2 s& h1 w, D1 Y" Y Q2 p# G4 V* p
to setup-turtles$ P* [) }2 ^$ U
create-turtles 1004 P7 Q8 _) Y' z+ t3 Z; x- O% S
ask turtles [ setxy random-xcor random-ycor ]
6 @- R" q. t5 M; d, [- D) m9 Vend
( Q! U# ^; n- C3 C& t8 @$ |to eat-grass
: o& Q* l; b. d8 Q! i ask turtles [% y O" l( ~! h, D" a9 ~
if pcolor = green [5 J# e D; w. D
set pcolor black/ j! P+ Z3 K1 u- T
set energy (energy + 10)
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s! ~/ o( A" U: U- y8 e* r( e0 l ifelse show-energy?4 m: E( H/ w; ^) o% @
[ set label energy ]
. d7 f, z2 l" Y. Y/ ^7 v [ set label "" ]9 V4 I% ^+ W1 N4 T' p u L Y
]
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to reproduce
. `; ?0 Z j) l" H; T ask turtles [9 e+ a/ K2 f1 {# f) [% m3 k
if energy > 50 [
( z1 P' V9 l" G0 E, ` set energy energy - 509 L7 ^2 k, l6 B6 M
hatch 1 [ set energy 50 ]0 v! a; W+ p# j, r2 L
]! X% B$ r/ n; O( K% W: J9 l; Y
]
: t1 p2 W, Z mend4 U8 L; X% u+ o1 w
to check-death
8 U2 u& A: ^$ P) A ask turtles [
/ U/ q) q( ]! v9 _" g9 r( _+ ^ if energy <= 0 [ die ]$ b8 G; o* F- P, ~ X# _$ f
]
5 n; N3 |* j+ \& }1 Y' g6 H# Cend3 s/ B3 D, d) i% f0 z
to regrow-grass1 D) j d5 F) g3 N9 [2 J0 R9 K2 A% e( r
ask patches [
9 |) v! [& o# L5 I' `$ w) t# O) | if random 100 < 3 [ set pcolor green ]
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end
d2 z: G, x) O# Q+ U5 x8 G {to do-plots" w/ m8 t# c9 H1 u( h8 v$ g! f
set-current-plot "Totals"0 v9 O" E& P5 o6 s7 `
set-current-plot-pen "turtles"
' f" K" f# ]# W, b6 @$ q" W: Q plot count turtles& D0 ]- v {4 G% M% G8 ]0 {# s2 h
set-current-plot-pen "grass"' v" P. J, t- |" s8 U
plot count patches with [pcolor = green]
& n) e7 \4 P! C2 J# N4 Yend" ^% B+ K: Q+ r" O* A9 f
可是运行时提示no such plot: "Totals"
, }" o0 ]0 _. Verror while observer running SET-CURRENT-PLOT7 D, R* I7 G5 {
called by procedure DO-PLOTS5 A1 x3 K! i5 z5 H2 G5 B: ^
called by procedure SETUP/ O" @( b& {& t3 f: S
called by 按钮 'setup'
- _9 F0 R$ }5 S. ^* j1 z8 _# Y# e求大神解答啊 |