我编的程序如下turtles-own [energy]! ~4 q( `7 }8 c. g7 P! r& N
to setup
, C. G- A: L1 h& S2 F clear-all
- ?( B# B8 R$ D# _+ h: y setup-patches
# w& S- R' z0 I3 Y$ ^: k) A( c3 r create-turtles 100
' M- E3 R, x4 p0 n' F do-plots
* z* q" n; d: f# G ask turtles [ setxy random-xcor random-ycor ]4 Q: A& ?" E3 ~$ N) u! A& p
end c' }; T* {$ Z4 N: J* @% A8 B4 d5 l8 m, N
to go
) w5 }/ g/ n& k% R5 j move-turtles7 P' D; u* c2 ^5 Z
eat-grass1 u. M/ W t6 F7 R
reproduce
% K$ r0 Q& S. s. G check-death5 e3 h7 I" R5 O% M
regrow-grass. ^$ H2 `' { K2 z( m7 m9 Q
do-plots0 ^+ m( o/ ]! `4 C9 ^
end
/ a3 f& H& W9 k6 M) ~to move-turtles
: o8 V4 K& x' i. y7 O$ m7 g ask turtles [
' X- ^6 C& D, }. w right random 360
+ X8 ^; N5 A C+ G forward 15 I' s' ?0 v+ _& m I' D
set energy energy - 1
1 S% Y$ X2 _. x' k3 E ]
) U4 ~: E& \: h% ~end
- f1 R9 Y; h+ m# e9 ^/ p8 lto setup-patches
% w1 p- e4 Q3 Q) c1 t) K( s ask patches [ set pcolor green ]
$ H7 f2 _4 l, c" y* kend
; F8 X, ^- X* P$ M6 }# Wto setup-turtles
, ~, U8 }3 X. }$ | create-turtles 100
8 b+ q6 Z, f1 S; E- P9 b ask turtles [ setxy random-xcor random-ycor ]/ N/ _) u8 s2 S6 o
end8 Z& s0 r. L+ W: J* x/ s
to eat-grass- [+ A, V: Q- ?; i7 }# z, R7 O
ask turtles [* {& K( {0 [5 v& t! b
if pcolor = green [: r" F U" O0 b' T! z
set pcolor black. }6 `3 O' n3 S" s: Q2 O; \
set energy (energy + 10)% ~% i; K' D. ]$ ~$ y) M
]4 W( Q1 w k7 {
ifelse show-energy?
! R' e* x r8 D- C* V+ ~ [ set label energy ]7 N, V1 k' Q; W: E: e
[ set label "" ]
, r' p6 O; G6 n2 y5 q ]8 c- `3 R @9 ~ O: X5 ]1 ?
end
. M1 q* I6 H8 C& R& G1 m5 F2 pto reproduce
7 Y0 E3 @) k4 @7 u ask turtles [
# G5 v. y- y" @0 ?9 D$ a if energy > 50 [
* m v" I$ S9 J set energy energy - 50
+ u. q& Z! g) s0 _ hatch 1 [ set energy 50 ]
5 C/ M+ z! o) Q- {& Q$ S4 s" q ]2 M) z r W! j# X' R' k
]# Y% x% V7 U5 c7 W9 K
end
& n9 J2 x2 ^+ L6 l- Gto check-death
! L: Q" t- T* C7 Q) q ask turtles [1 g& }, E$ Z- G" M( F
if energy <= 0 [ die ]/ [1 f! o3 J( z2 M! l
]
a( W. a t. W3 o# K; N. h/ lend
) |) Z1 X( d/ O/ w8 Ito regrow-grass4 \0 V. O1 A! ]$ ~. \ \
ask patches [
" [7 x) r |8 E/ }( M if random 100 < 3 [ set pcolor green ]
+ t3 ~9 a* f" X. A) v: `, } ]
% w! w+ o( x. n- S$ d, Cend
% E! r: F( `( E& s% T' Xto do-plots
% M/ p" x7 r, H3 \ set-current-plot "Totals". \% B8 s/ y& e# K# \
set-current-plot-pen "turtles"
: t1 D8 z, b8 h/ F; g- ]# ~ plot count turtles
/ N g: g* @0 g7 _+ E set-current-plot-pen "grass"4 {0 R8 R1 _7 K5 M' z3 f2 Q6 f
plot count patches with [pcolor = green]
& x# W! p: v) n, ~5 M5 Y6 j' x0 N* ]end* Z) C- \& I1 Z5 ?9 g
可是运行时提示no such plot: "Totals"# u: L! |) E" j) P6 ]
error while observer running SET-CURRENT-PLOT
6 O# o- [7 k" |) \7 N3 M. ~% c called by procedure DO-PLOTS
, ?- [$ s/ ~4 i4 y5 L+ t called by procedure SETUP" i- a1 ]+ A0 V) u' L8 V; ?
called by 按钮 'setup'1 S, Y7 q8 H1 @ w* t) Q2 R
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
