我编的程序如下turtles-own [energy]
$ R1 e, ?8 A; g$ Q0 Zto setup
# S" o6 r/ s" ?6 @* n clear-all
# c' Y5 T. \( A6 k) L* \* f9 V setup-patches
) }" b% W4 d. E7 f4 L" X create-turtles 100
' h' Y4 A9 p" ~4 A2 x do-plots
3 s& @9 o4 e. v+ y- d( g ask turtles [ setxy random-xcor random-ycor ]
- o1 |3 h; P1 P2 lend
( y) @$ B: X6 s$ L& O/ `to go$ V4 Y# R r1 _! V" W1 b U; k y0 p% d
move-turtles
8 I9 H# H6 h& O1 [ eat-grass
! Y/ C' R+ x5 R% M- y reproduce
( S8 ^" p( E! u q) U. O check-death
5 g3 A$ _& |: U. B9 ^# L regrow-grass
5 } B5 D( L8 b7 b7 f) ~ do-plots6 M+ u" S6 y ` U x
end
* a/ E; S( I5 d6 Wto move-turtles* _7 V( u5 D. C0 {6 W
ask turtles [ Y4 N# J, e, x0 i1 }
right random 360- b s1 |5 {8 s# H7 X r/ C) j
forward 1
& h9 N' I9 N2 z$ i1 T set energy energy - 1
2 O/ q2 u8 E9 E3 G4 O ]
) M% w% S+ E4 J+ Nend3 O6 T7 C6 _% V" w
to setup-patches
# L$ |4 W+ V5 [* r* M ask patches [ set pcolor green ]# Y! h1 \4 A2 [& t A
end
" l7 p+ Y4 z( z1 H! {4 y- a' Fto setup-turtles
& R; \# o9 {+ `: Q create-turtles 100
2 ]5 E2 X6 A8 s+ z ask turtles [ setxy random-xcor random-ycor ]" ~! ^- n/ s/ o/ A
end' `) C: {8 C7 s* P) Z5 G
to eat-grass+ j Y x2 d' W5 z6 Z# F
ask turtles [ y+ I! B1 z0 X! a; q
if pcolor = green [
7 i" _! [4 X9 M set pcolor black' {" v! [% R' b/ s+ v }0 ]
set energy (energy + 10)8 z& @8 \/ q7 C! o
]% p2 }$ z9 K7 s& g$ ]
ifelse show-energy?
" g) M8 F" {* j9 V [ set label energy ]9 s' M- X; R1 |. ]# @5 }8 s
[ set label "" ]
, g b6 U5 p0 K( e. ~" k4 c ]& D# m8 M6 S5 ?! R, N* I) y
end
/ R/ m9 L! U) _: s& J4 R3 rto reproduce! S0 i! `' u% m9 t; ^
ask turtles [$ q X# T5 h' l' T! z1 \0 [
if energy > 50 [
' N: P8 j. z; o! B1 Q set energy energy - 50
5 h4 M/ O7 d/ `3 J! M' m5 y; H hatch 1 [ set energy 50 ]9 @+ t0 ~, w7 t; i( R: M K/ e5 |5 z
]
" O4 }' o; b [/ | c* c+ ? ]# c) y- z* ?/ P, p! s
end+ j* {1 H% }) x4 d
to check-death
2 j& b! ?& n4 x+ b; M ask turtles [* F' t# A o) \% c* d
if energy <= 0 [ die ]
3 C! S% `, F1 H' r ]
8 a3 \6 V9 a; O3 U' b$ Zend1 ^/ e) N" O" v6 `' K
to regrow-grass
/ }3 \, c6 F. D# F ask patches [
! D x, {9 n5 f, `4 c if random 100 < 3 [ set pcolor green ]$ Z- ]# O$ [8 I) q
]
& _/ Y2 c- v5 [+ o( Hend
! l, l2 Y. u4 k5 y' r2 n1 ito do-plots7 _* @) B, I7 W# F+ Z
set-current-plot "Totals"+ B3 O U$ d S- y2 p+ R
set-current-plot-pen "turtles"5 Q& y2 u1 w$ M' _
plot count turtles' M/ l) h' w$ r5 j; z1 m& v
set-current-plot-pen "grass"6 ~, b n: X+ H" g1 T! |: m
plot count patches with [pcolor = green]* c8 @3 N+ \/ }! g; v
end
2 y9 I# I' l" ~- `; f& P t可是运行时提示no such plot: "Totals"$ y& f, x8 \# D
error while observer running SET-CURRENT-PLOT: S5 M3 K& c6 _ a% [
called by procedure DO-PLOTS4 g/ v/ h+ U4 b! l( c( z% _3 {
called by procedure SETUP# a d0 \" r6 r9 w& A* N2 ~. P
called by 按钮 'setup'
1 a% \. B" O& B* P6 w求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
