我编的程序如下turtles-own [energy]2 l) z( q) A. W) K& v. ?
to setup1 x% u! ^ z0 z4 {0 W6 F Z
clear-all
+ g: Z& J- H v& r3 [1 v setup-patches
' ~3 w: M% M: H8 W+ L0 w, y create-turtles 100
8 b' p; j$ E# {1 Z* \( F- S do-plots
( P% f' d& R. A+ u1 h; [. q8 g+ h M ask turtles [ setxy random-xcor random-ycor ]0 |* K9 y; D- V r& t
end: v% ~' N; W1 l- L' x! I8 A
to go4 u3 X6 g" T1 i3 ~* Q$ p
move-turtles# O; A, I5 c, B$ l: H* p1 X! P& v
eat-grass
$ @$ e4 u' X6 @ reproduce
# F! M% Y: W, p; Y check-death, `5 b- ?8 }# n, Z1 Y m
regrow-grass3 L. l5 u4 l7 K' i" Q$ l/ ^
do-plots# h: Q; u3 Z0 c" y$ r7 ~, Z
end
/ {0 u- m* z$ \1 mto move-turtles
" q* i6 k$ u6 z. k ask turtles [
: N8 @4 A# V4 K0 O% M; P! O1 H right random 360+ d- X! @: p; {7 |
forward 15 I& d: z x) T0 \9 g- C- f
set energy energy - 17 N* A$ ] L) J8 y( k/ S7 R
]. P" O1 `- [9 s0 |7 e# _* j
end; p7 ?- e4 u( T$ U$ }1 u
to setup-patches
0 |$ [& @8 i# U ask patches [ set pcolor green ]
0 }' C% }" a4 Z! x8 ^: z' aend$ W" _3 Z: |4 I- F7 c% W2 ]
to setup-turtles, _0 S2 L( L# K) H( g! T3 Z6 u
create-turtles 100
4 `% x" ]1 ^: b ask turtles [ setxy random-xcor random-ycor ]! y# q- M" {0 O# L
end
' G( d& j6 k, _% uto eat-grass
% b% l' J# d; t ask turtles [
7 ~. T# H1 p- }4 [- d) R9 L if pcolor = green [
4 R$ w7 S' F; B% G$ B% T4 F set pcolor black
8 _6 M. s/ _7 V set energy (energy + 10)7 `/ F7 }6 A8 y/ c4 y) W; l6 }
]
/ j" `- U# r. y! B/ G ifelse show-energy?
, _6 t( M6 p7 h% v [ set label energy ]. e, Y- t" M5 Y+ [5 q7 w
[ set label "" ], `) G) x2 T" o
]
8 t2 I! [; p" b5 o' }end& O+ Q/ p1 r" u: M3 m2 h1 q5 U: i
to reproduce4 ~2 I2 |# \) I1 L, p6 G
ask turtles [
4 K3 Y' y: \2 d. Z9 p if energy > 50 [7 i$ l; @5 H' c8 j
set energy energy - 506 Q; q! }9 F1 Y7 f7 _, }6 {
hatch 1 [ set energy 50 ]: j* E9 K+ {, H' ?# o+ Y
]
. }" D# W7 [' e( t ]" J# g7 e+ D% M3 s! c0 ?( |7 _
end$ b7 G" G7 M m7 I: d2 O
to check-death3 a# @/ s; o: P9 U$ ?
ask turtles [$ Q6 j" m7 E7 _
if energy <= 0 [ die ]; x E( ]6 B1 q: H& j
]$ u N3 L% N1 b$ A. l A6 v
end
6 B3 s4 S9 z' }; l } @3 pto regrow-grass4 ^0 C3 m6 [+ U% G8 K. M7 V0 p& P
ask patches [0 k" r3 D4 G+ V3 A4 `, z# l; h
if random 100 < 3 [ set pcolor green ]
; [ I" j% z5 H" l: }/ V ]
) C* h' U% b9 a5 ~; Q+ lend& \. V) h' L1 A4 ~( ?: G0 F" N- B4 N
to do-plots
* B2 p5 p' y) f6 }) l0 Z set-current-plot "Totals"
s1 H/ g6 P6 e# b5 ^ set-current-plot-pen "turtles": `; l0 v! Q0 x( r4 V# S: Z1 \3 Y
plot count turtles E/ l5 s" A0 G) J0 g6 k/ U* A
set-current-plot-pen "grass") H& b9 k* T h& r
plot count patches with [pcolor = green]
- M) u$ ^) _4 `end$ `; e. X5 v2 @4 A$ o: E
可是运行时提示no such plot: "Totals"4 _6 `$ P! \0 o* l. T2 e
error while observer running SET-CURRENT-PLOT
9 L- L" ]' j a# \) M; I3 S4 a7 D4 J' [ called by procedure DO-PLOTS
+ Z5 ?" u1 X7 S3 T: W5 ~ called by procedure SETUP
* U' {. a" n! |; a( ? called by 按钮 'setup'' F0 t( |5 f1 j
求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
