我编的程序如下turtles-own [energy]# h& h; Y; W6 m5 F6 f- f
to setup/ S# ^9 h- e& h; ^
clear-all/ I; l9 P8 I1 v2 L- f1 p( u
setup-patches2 L5 i/ O3 F. v% Z9 P& k: S& V+ E
create-turtles 1006 v9 b0 E, u& W8 k* I( Y5 u3 b
do-plots6 |' l: Z- P, u1 B r
ask turtles [ setxy random-xcor random-ycor ]
* Y0 U$ q) u3 X$ ~- h% T8 iend
( n; T+ l# H( F9 u& b, y4 @to go
[4 } f) x9 K! N% I0 x move-turtles
- x, S" L; l7 k! U/ } eat-grass
( _' l. |8 C# o/ T reproduce
( J+ P; e) Z( X$ O- M check-death8 J! U% w& {: [
regrow-grass: i+ ^% X2 z1 Y- ` M
do-plots
) N, K C2 @/ D6 W& n) h0 vend( l6 g; u7 {9 \/ X; Z
to move-turtles6 f! P+ i3 u) w3 e t7 V
ask turtles [$ s0 D* y/ I" A* D' L
right random 360: `& I7 t7 P3 D5 [5 g3 M" q
forward 1- J6 J( }2 X6 \3 h0 ?
set energy energy - 1
3 D9 o9 B( S" N# G ]' `2 D4 y1 N1 O9 ~
end
- P' k( o) x3 o+ l7 Oto setup-patches4 i% m+ P, c* F5 q" r
ask patches [ set pcolor green ]) F+ a9 r0 W0 A( r
end
: I) ^ F8 q/ ito setup-turtles1 ?3 E$ f( t8 ]: Q* X+ h
create-turtles 100
0 `- X# D, ~( Z% A2 n5 n ask turtles [ setxy random-xcor random-ycor ]7 O+ s J; m6 R! Z" `* ^
end
- D$ m; G$ W% lto eat-grass
8 X' H1 h$ F( P$ v4 l ask turtles [
# s5 A/ C9 H' n8 q- H# {+ {1 f if pcolor = green [# q; b9 B: y$ e: E
set pcolor black# c4 ^6 P" V& f i# Y
set energy (energy + 10)5 A# a: P* L6 C6 f3 H$ s
]! |$ M! e5 ?! P6 y9 [5 J
ifelse show-energy?
' O5 l% @" k1 ? ^2 _ [ set label energy ]
i) d3 [: R; P. c1 s* \ [ set label "" ]4 n' U/ d/ F; ^. W
]% |$ p: _9 N6 U# Z/ @' ~
end) J0 W/ a+ N$ h" o$ v: p9 S2 N' ~9 N
to reproduce8 z# }0 v) I- C( s
ask turtles [9 ~! I j7 F7 q! \( \/ C8 c
if energy > 50 [0 w% A7 N P4 @2 p
set energy energy - 50# }( o3 X1 X6 Z' A9 U$ ^
hatch 1 [ set energy 50 ]6 ~. }8 B: y+ A: u1 y
]) } u& v' P$ }3 E R8 E
]
# E' Z" h' y- S7 S/ V( ^" {end
6 v* @2 H: p. O- ^1 q1 T& s& @to check-death, G$ C& _& I9 V8 q" u
ask turtles [: @% z {( s* b, u0 {9 ^. P: L- r% Y
if energy <= 0 [ die ]
9 |% M% u; X Y c, Y3 Z' ` ]6 M1 `3 @% o9 Y% P
end9 f$ F" G; v0 [4 ?" `) [
to regrow-grass8 V5 D$ a7 u* k
ask patches [; T1 p- l5 r& D7 J
if random 100 < 3 [ set pcolor green ]
$ Y8 ^. D3 O' w7 L& ~ ], Q2 p& Y. j: L9 y0 O1 L" r
end
! G- c, Z7 c8 nto do-plots
5 C# Z# \/ m" z set-current-plot "Totals"
4 Q9 g/ _" h h7 e ~3 ^ set-current-plot-pen "turtles"
; _# W9 ?3 N/ Q8 f plot count turtles
6 T% ~9 Z$ w; ?& ?# c set-current-plot-pen "grass"
* V, }3 P! J. \ plot count patches with [pcolor = green]7 p6 ~; {& u* f! t
end: Z" q* e% H4 T# `
可是运行时提示no such plot: "Totals"# i, ]- o' n+ j% y7 M
error while observer running SET-CURRENT-PLOT
# |0 c8 \ H+ c6 ~9 A called by procedure DO-PLOTS; p: _' r) _% j' M! `% b
called by procedure SETUP
* A8 B6 M+ K4 T called by 按钮 'setup'
6 p. @$ S5 ~" V/ E$ z/ W求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
