我编的程序如下turtles-own [energy]$ y) n6 A: C; B0 t1 {" y
to setup
, r' B0 |- n, n7 r+ ` clear-all' f9 \; M$ p% |1 p9 P
setup-patches
+ B; k! g3 z* s b create-turtles 100
2 L, @2 [! w; J) P- w: e; L) Q do-plots" t4 h# t8 N" b" j% @7 @4 W
ask turtles [ setxy random-xcor random-ycor ]
5 |6 v" D% a- G. I3 M5 Yend" p& E: {+ l9 E$ o9 o ]( ^6 S
to go) C# U1 l+ N: _4 d, p3 X _* I* ]
move-turtles
% p) ?* ~! i* D/ p eat-grass
! c0 m% M# I/ [& ^ N reproduce
0 M* Z8 u, C3 o- v& y: u check-death
5 ]& N' N: d9 h! A# Z regrow-grass1 X) H7 A) E7 [; M! I1 {
do-plots0 N* l2 u' {8 w6 ^( y
end C" F2 _. j% g) x& x
to move-turtles
" I7 k" n! y P/ S- \6 G0 v ask turtles [
* {% K y9 w: K- v& L( x* L3 U. F right random 360
4 h8 B5 W5 J4 ^5 i! q forward 1) t7 B* l6 h9 ?
set energy energy - 1
% J) @+ t9 i ~/ ~- R ]
+ [! q# _ Z! Y* M7 n* }end
# Y( ^9 H, d8 S" ^0 Ato setup-patches7 P; {3 S/ O C* U" j- z
ask patches [ set pcolor green ]& e4 r- R. O) F0 i
end! g. T) B5 K- w+ N( }% u* t4 B6 Y
to setup-turtles) g S; {5 V- a+ b+ z
create-turtles 100
$ ]" U5 u1 R+ c2 n ask turtles [ setxy random-xcor random-ycor ]4 L- w7 f0 V$ p/ u# W/ L
end
$ C/ ~) Y% I: w% Hto eat-grass
6 P0 x( ]* t0 k# q; G' [ ask turtles [
0 d7 M, x" {3 H% B7 q. z4 U' M if pcolor = green [
8 P- f' T" M' a set pcolor black4 o) J1 \/ ~1 O" S9 U* R, M3 h
set energy (energy + 10)1 k* k) Y% L7 O$ F5 c( M8 |; Q. T' U- }
], _& L# e9 e9 }% W5 a7 z/ }
ifelse show-energy?' W$ N6 a/ i2 h h
[ set label energy ]
! D- I( M, `' `& g. ^/ _ [ set label "" ]
- [ w$ t# [" N ]
$ _, @ X1 X* B- ?9 Yend- H! L) s" V% g* A! k& Y
to reproduce
6 N: ]9 _# x6 n# P8 U3 ?, {; h& L2 N ask turtles [3 B0 Z8 q+ H: j3 G
if energy > 50 [
2 @. h$ ]) p a, s5 C$ q6 m G0 s set energy energy - 50
# N- l5 _, C3 J4 m3 d hatch 1 [ set energy 50 ]
8 J* V7 Z0 V8 q4 P e ]
1 J/ {/ W4 @( y4 z- D ]
8 R/ z) r: ^' k) P5 v, n+ S. kend. v6 \0 G& f0 r$ _
to check-death
( r2 z$ X) [0 [ ask turtles [
; ]+ \6 I2 L- g0 x( B7 g if energy <= 0 [ die ]! H% h! E0 r( C$ V. B* g f$ L
]
' n: H, o8 X" r5 Iend
8 ^( B5 @1 U* @& Y; Xto regrow-grass, G% Y+ G. d4 H
ask patches [+ N$ W e4 d& M$ J& o
if random 100 < 3 [ set pcolor green ]: ]. z- ?" M' Q* T& i+ z. I- d# l
]
, g; P$ N, x% P% jend. y/ I( w; }2 E7 F' m
to do-plots
+ k. f7 m. }, M) O+ q7 f set-current-plot "Totals"" z) |( q. C& G5 z* O
set-current-plot-pen "turtles"
5 ]( _% C j d8 e0 W$ T; b plot count turtles; |$ {( s3 K: w8 O: K u* I; ^
set-current-plot-pen "grass"+ `1 Z/ _7 {. z6 i1 k5 Z, [
plot count patches with [pcolor = green]2 z3 a! W: e5 M, E$ H
end
' e. V$ R1 D+ ?4 k4 t5 F% Q可是运行时提示no such plot: "Totals"# V6 A: j9 G {, U6 T
error while observer running SET-CURRENT-PLOT) L1 j+ U+ {' b9 Y7 `( j( |9 a8 b
called by procedure DO-PLOTS$ _% g5 o9 U# G' e' M
called by procedure SETUP- U3 H0 ^! h, m4 X/ W
called by 按钮 'setup'
' a& @0 j! ^- y0 A# N% H求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
