我编的程序如下turtles-own [energy]
3 F& v1 ` P5 sto setup! r( O& i8 R6 j
clear-all3 |+ N3 c& X; |& I
setup-patches
: a5 r/ p/ c* X+ T6 \, g% @ create-turtles 100" q U/ e* _ b8 l, n: N, s/ w
do-plots
9 T+ h& |& a2 H3 T ask turtles [ setxy random-xcor random-ycor ]/ F+ h, p2 H* g; e# X# _4 L# W
end
7 _$ [5 `$ p, f% e8 o4 r6 l9 Nto go
% A4 ^/ ?( c, o% s+ @5 F# z0 d move-turtles b9 D( p( U! ~
eat-grass( l' Y/ W; d* O' }+ B3 b# g
reproduce
* C/ q1 Q8 M0 P8 T7 D& l' V check-death$ M5 d! e. P; E( o
regrow-grass
- X3 F9 [3 ^1 |- t. \6 J do-plots$ c/ b+ \, Y& \
end+ }! m) o4 c; ~% W0 |8 h4 j
to move-turtles
6 o( L) q/ B7 H1 V5 i. T% r ask turtles [
1 ^9 X% }* G# R right random 360* Q* w0 C, u. C$ ~7 J
forward 16 Q, h6 y* V3 e5 E
set energy energy - 1
' k% X+ Y7 t& I ]
! B, P0 @$ F. k6 [. k K) mend
$ p, N. Z! [# X3 v& I3 ^to setup-patches; ?! D5 s7 p X+ `0 M/ j, ?+ H' v
ask patches [ set pcolor green ]/ p# S4 F4 {3 c9 W3 y) ~
end7 X S: l" M) b% Z
to setup-turtles* C" n, g8 Z! z+ U
create-turtles 100
/ {6 U# f% S+ a$ O* ?- l ask turtles [ setxy random-xcor random-ycor ]0 f+ O' q& c# j
end- Q: N- E0 o! }4 Q; B3 H
to eat-grass
) Y$ f/ }# f; c# \4 \ ask turtles [
/ B$ P1 T5 U2 @0 `' N if pcolor = green [
y4 u6 ?5 p, Y& e y0 {! k set pcolor black
# \: O. |3 g8 D1 v1 K4 ~ set energy (energy + 10)6 p5 R: y. E$ G4 Y$ Q2 n
]
X6 ^. Z( |) Y ifelse show-energy?
$ Y3 Q1 r5 B% }+ z2 v- `+ @ [ set label energy ]
3 Y- h9 P9 c) g& g1 d9 v! l% ] [ set label "" ]0 B, j6 R/ q2 a) s7 D
]/ I! w6 |* _" n
end
, l5 H: I; u- h% c9 N4 _ uto reproduce7 [" Q @; g$ m2 Z
ask turtles [4 m' A+ X _2 C( y3 a) l
if energy > 50 [
$ m) ]: K- t3 ? set energy energy - 50
4 \, o- K) i ]# F( X- Z hatch 1 [ set energy 50 ]/ z" k/ X$ l# u! x0 Y; v8 z3 w
]
8 j- Q" u' K! T7 @. B ], h1 H8 x% W6 ~8 D
end
" t* h& E( N. S; k: d+ ^/ q/ O Wto check-death$ k4 o b0 W, E# F
ask turtles [
3 |& t) ~( e- Y if energy <= 0 [ die ]$ z% \8 L. y- R! ]! [4 j& A. c/ `
]: Y7 W9 a. Z: E! g7 c
end
6 b+ ~# _* V- w7 F+ [* D& Kto regrow-grass {, |' K: [. h- Z
ask patches [
+ F8 | b- x; ~8 S% y if random 100 < 3 [ set pcolor green ]2 e6 \! ~/ Y `
]
" C9 Q& E4 a* M. cend5 N4 A( N, z* B( O' s0 S3 r6 c
to do-plots
( f% W0 Q! O$ q, P$ n0 w' u/ \8 z# F n set-current-plot "Totals"
+ X9 o: H/ i5 s- s8 {- F/ X& a set-current-plot-pen "turtles"
, R5 i# ]* x2 [4 t4 C3 T4 y plot count turtles
! g9 F3 l9 c- i# g5 m( [3 ` set-current-plot-pen "grass"% ~/ S. w4 @2 B
plot count patches with [pcolor = green]
0 i. R; @6 n, O2 K; n: h: pend
: k' T7 Y; {7 X8 f0 {& X可是运行时提示no such plot: "Totals"- D; } v0 u# U) J
error while observer running SET-CURRENT-PLOT( B5 v V9 W! z
called by procedure DO-PLOTS
5 }* d+ C# R" q2 r9 I called by procedure SETUP6 p0 P# l1 d' P( }
called by 按钮 'setup'
6 X# v% j: A$ E, S2 e1 ~( Z! ]求大神解答啊 |