我编的程序如下turtles-own [energy]3 R Y" c3 _+ E4 f
to setup' [9 l/ ?9 X0 J( {) M
clear-all% w! a3 u7 W2 O) Y% f e
setup-patches3 t) S8 {5 W0 N1 U. C; i
create-turtles 100" a$ }0 E( w; @% f9 e
do-plots. D, C' h: i# a+ e3 u7 U5 E
ask turtles [ setxy random-xcor random-ycor ]5 W/ N6 w9 @6 n. K' U) {. L: H
end
- L, r2 {& F1 ?2 f4 Zto go
: g7 F" `. o* s. a move-turtles" b2 k, V. _1 j' V5 `+ V
eat-grass
# P) ?4 \ F& W* |% o3 X d reproduce, ]# V, U: W8 U( w
check-death
" z" p# G+ U3 U I8 H& N1 y regrow-grass# u% b7 Z$ t2 `8 W+ x
do-plots- k6 p% p- H% x( `+ h0 g
end; F! S* Y9 a8 [, f% V6 j
to move-turtles$ Z7 v) P h/ k: i: q
ask turtles [
& Z1 C" h" x4 z- B- P3 P right random 360
- N$ K, v3 l& V e$ m3 }7 x. W forward 1
3 }: m( v' c: h2 H6 U- l set energy energy - 1
4 T5 V, |! ?& t4 o ]
2 f3 B3 Z2 m6 |4 {end
. k8 |) G' M/ s& Q2 z5 @' j1 gto setup-patches4 X5 X; F* A5 Q' Y
ask patches [ set pcolor green ]
$ q8 E0 `$ A8 E( Z- @end
1 D$ X0 c5 Z) m4 z6 v5 @to setup-turtles6 x5 @( I+ W, t8 ~0 |5 I" \+ Q2 p/ X
create-turtles 100
8 D9 ?- f9 s: k/ w ask turtles [ setxy random-xcor random-ycor ]" K3 U: |5 C5 s2 K. Q: Q
end! w! v4 k6 H% m: _
to eat-grass3 j; w+ N2 @' c D. r4 H8 G9 l/ m
ask turtles [# [' O. I2 e; c4 C* }* ?4 {9 y# H
if pcolor = green [
7 C6 J6 l4 A# l m) @ set pcolor black+ c4 Q* ]: \& r# k. X( U
set energy (energy + 10)
- e. D& ~: \) O% H: P# l% m3 o- q ]
& L8 s) s( }( l [; q ifelse show-energy?# k7 _0 W7 P3 l+ e7 F5 B: c" W
[ set label energy ]
8 \1 m. V" i; Z4 t) s) Z- ]2 U [ set label "" ]
$ M9 S! q4 h8 S$ l' G2 K; n ]
4 \3 A! a5 t8 W% E, V8 Zend
! d1 f3 R! f7 Y% R8 T& Oto reproduce
0 v' v1 K. d# d8 m* A7 s ask turtles [
4 }8 `* b ~" `6 M+ P8 u if energy > 50 [! a: \( e& w& Z8 Z9 Z
set energy energy - 50
7 [8 M2 F- b6 ?1 G ~ hatch 1 [ set energy 50 ] v% E% S$ {; q9 g
]
9 A, Y! }( X; q ]
' G9 }/ ?# V' C5 l, ~# v. C Tend
! Z- F0 h3 L4 t! U# h' D, Gto check-death
. I0 p3 a- z Q2 e% v7 V% L ask turtles [
4 U3 ? b6 h$ i9 J if energy <= 0 [ die ]
, B" X1 H$ b) L. q6 ]* j3 s8 Y ]4 F- A/ }' e: C
end0 [) |+ ~5 x# I, \( }# J. ^
to regrow-grass
G8 p. K8 K0 q& S \* P, V4 c9 J; F ask patches [
# |8 I8 t) K) x5 h/ G" Q) f8 y if random 100 < 3 [ set pcolor green ]
/ v( D: W( T* e* F# T ]
/ F2 N- i& P9 a) n# ^! Pend! g& _. e2 K# L) G3 o8 f1 _
to do-plots3 f% H! R5 d8 b: ^
set-current-plot "Totals"
' G6 M. `- C6 _ set-current-plot-pen "turtles"
8 G% B) z) T1 |2 T% x4 U plot count turtles
7 d; @) n4 m* \9 w set-current-plot-pen "grass"4 U' \8 [' P- F
plot count patches with [pcolor = green]0 I6 C- @; {1 h' k& _" w
end3 F0 ?( c) a5 v& a
可是运行时提示no such plot: "Totals"
5 d, b& L# E. @8 G Oerror while observer running SET-CURRENT-PLOT
0 M6 V7 t4 x# b* @ called by procedure DO-PLOTS* V$ ?+ l" \0 J g
called by procedure SETUP) l- x% l- R8 t1 a- d- z5 S, ]
called by 按钮 'setup' X1 W b3 N) `4 n- C
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
