我编的程序如下turtles-own [energy]( _; ^7 q' R+ m' V- M
to setup
# ^4 U$ L. p3 c( O( E6 }5 R2 E) u clear-all
* i* s0 i' u+ s. _: I setup-patches, O* A. G( _7 I0 K j
create-turtles 100( h1 O; }' G+ D1 ^
do-plots
% w, K1 E: K5 E) ^# R' ~( G ask turtles [ setxy random-xcor random-ycor ]
3 ?, c9 Z$ X/ g) U& V* H8 Hend, b! g, |+ q' h
to go
3 n, w! B, [/ C$ D: D( |; m move-turtles2 P" H$ D0 J! t; M6 k7 l
eat-grass+ }0 T' K, X- u2 g. N! o( @; D P
reproduce
( b( u+ v I7 u1 o6 a& H check-death
7 q( T' |+ e, S9 S% ]7 x regrow-grass% ~, P, g4 Q3 Q1 J& R$ }" q8 ?# u- \; {
do-plots9 g+ m( z8 X6 m5 v2 T* W& D
end# e& U8 Q0 K7 V7 P
to move-turtles
8 K1 {4 d, \" f+ J8 X* @ ask turtles [
* W, y$ \9 R" I) j right random 360! }3 J; D5 Y: i
forward 1" y4 h9 }* i( A3 S' V% ]! f
set energy energy - 1 ?/ y. R) Q+ Z
]
2 |, X8 Q& D" L" R& \end" e3 w& H }' A, e' T* `
to setup-patches
/ F1 e# M+ j1 l ask patches [ set pcolor green ]% _! q- a$ M: K# }0 R2 s5 \& t
end
" I( r- u/ ^' E4 Rto setup-turtles7 n. R% r: D( N, o" O+ O, `
create-turtles 100
% a/ X: @7 D; W ask turtles [ setxy random-xcor random-ycor ]* x6 o: K% t, B% P; [
end; x$ i7 K# F( F
to eat-grass- D: H: H6 @. ^7 Y. n- B4 ?4 j
ask turtles [: n1 V" Q) H6 k5 s' d Y) e
if pcolor = green [3 |7 a# K0 a$ c! s! I, A* V/ k
set pcolor black, Q* e6 n5 ~# n$ U% v
set energy (energy + 10)* j5 X) q2 r3 {3 s' J. I
]/ b3 i6 b/ C. U/ T
ifelse show-energy?- @' X2 v( _2 b/ ?
[ set label energy ]0 d$ }7 B$ s4 s1 z# @
[ set label "" ]
" ?, d4 ^( B* t5 P3 B' ^ ]
. ^1 i" k) x5 v( H+ w1 Q- }. x4 Z/ ?, pend: Y. @+ D$ }0 m, J5 h; b- B
to reproduce
' L$ ^9 r7 E. i7 u4 @5 U ask turtles [
& S+ w6 C) W; n; p" t3 M' k if energy > 50 [
~6 ^3 g% L5 y: I' ? set energy energy - 508 ^3 e4 k' J# Q# f: G* d" Z) Q( e
hatch 1 [ set energy 50 ]$ [0 _1 p; c4 k1 U5 Z
]" q$ k6 U. B: Y9 O' W% T _" y
]3 X! x" w8 ^5 `# x: j* @! D* H9 m
end
: Z( z" P' D7 d, X8 P5 F9 S8 Zto check-death
& y9 o7 W7 K$ ~ ask turtles [! \5 z" i8 i) I2 b, D
if energy <= 0 [ die ]
; V4 m; O& c* ~" A9 _' ]; G; _ j* X ]
$ P4 b7 T; O, v$ D( N- send
$ @, [! O/ y, V% Qto regrow-grass
2 |# D0 B4 O6 a/ d$ y; y ask patches [6 R; u# [- q+ }* x1 ^* J; ~
if random 100 < 3 [ set pcolor green ]
% q8 W8 Q+ x0 R ]& B' A( ]: J+ }4 S* T+ }" q0 {3 L. m
end
2 y" E6 V% ?& Rto do-plots! {# {: V; i' i7 t0 ?. s( d# r# |
set-current-plot "Totals"
# z1 o$ M7 P3 v# t/ {2 e set-current-plot-pen "turtles"6 K( p7 m, e/ n7 X7 H1 h
plot count turtles- z3 D2 v& Q3 h2 e! x$ j
set-current-plot-pen "grass"
9 R% [- u. }2 r% g plot count patches with [pcolor = green]' U( |5 U% R% Q$ A
end! ~* q% {$ U! O* s6 u
可是运行时提示no such plot: "Totals"0 W& H* o- U( I6 d/ V7 N
error while observer running SET-CURRENT-PLOT! @0 J/ V* Y+ x5 O
called by procedure DO-PLOTS
- i) Z/ Y. n8 k8 p8 F+ s* E called by procedure SETUP; z$ c. n) W$ y) t+ @2 l
called by 按钮 'setup'6 K4 R& b, Z$ E. T* {
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
