我编的程序如下turtles-own [energy]$ o7 {7 t1 d7 j x: w
to setup7 q+ {4 L+ b/ A( Y
clear-all
( i% _2 N) m8 j8 D; w- r6 t setup-patches0 N8 d) g- ?' `* H, a$ f3 u
create-turtles 100
3 W, P9 J( ], t+ Z8 N8 o n do-plots
0 X% n: U# {. s" r1 O: }- k ask turtles [ setxy random-xcor random-ycor ]
& f* [" Y$ d8 {6 fend
1 u9 j' b7 Q% }/ U/ V! s6 Lto go, p2 r2 T7 i" V' S$ R; x. I2 F# a
move-turtles
- ]/ _6 y8 y3 H- v* D- |0 v eat-grass
. j7 _! }& h3 k! s& w: ]4 j7 p reproduce. c" J3 G3 t; b) D- C3 G
check-death
/ D1 Z$ e- S7 ]. z/ o regrow-grass
3 k; t" \8 k- X! N9 ~. U, P do-plots
) v# g/ G; a! w$ z7 B X( cend2 ~: T* s+ }3 L: X! U
to move-turtles% \% |( X; `2 s
ask turtles [( i; J. g& M( u6 P
right random 360 U9 q. u; t0 g) P; b( G9 X
forward 1
8 i. h% O+ M! Q set energy energy - 1
& M! D4 u7 W$ V1 ` ]
( a' {+ L9 t9 Y$ k( N( G: g/ gend
' `) @) n8 T. L& g, b# Mto setup-patches0 S! b/ P4 ^7 v/ O: D d# T# Z" ^- _
ask patches [ set pcolor green ]. n7 F/ ^! l, l$ F0 k7 V2 B# j
end) F, R1 u8 _% @ T0 m, I4 j5 E: }; Q2 r
to setup-turtles
6 s s+ p% _% N7 e create-turtles 100$ L9 I7 \6 j+ _" Z
ask turtles [ setxy random-xcor random-ycor ]" z: U6 V9 V# p
end
2 s3 q4 t% u8 ^- J) \! R1 ]' ?' qto eat-grass; a) `! S1 ~0 z% M' L9 C
ask turtles [
& f9 o- A8 `7 }; A+ q8 ^9 f if pcolor = green [
9 r! b8 f& A( S' Y* X6 G set pcolor black+ c3 o/ d+ z6 d$ L1 s- {: x
set energy (energy + 10)# k- S& W# i f! ~$ S
]# Q \9 G$ `1 D2 p# q& T
ifelse show-energy?2 k. H6 v: |, {0 ?" @) A. ~; {
[ set label energy ]
% N( y; z+ Y8 Y7 E: P0 R [ set label "" ]
6 q7 G4 o) n" `" F ^% ] ]
U i: K! ?5 S8 aend( h6 e. I; I* C+ }/ A
to reproduce
( Z! R8 C& ?0 b) C* Y4 C ask turtles [- j1 u. G0 }- G" d
if energy > 50 [
4 }7 Y2 j; S+ q7 w: z2 H4 x set energy energy - 500 ?2 R" O( G/ U1 I4 j, }0 g
hatch 1 [ set energy 50 ]
0 i' ^: T% o0 U: B# x( a7 O( G ]9 E3 k( ?/ }$ E. J7 Y% V: m, e
]
5 ~ U; ~' `( aend" v, Z4 j1 y2 c- Q. c
to check-death
! ]8 C% Z ?9 `0 i" g% O+ E5 A ask turtles [" y+ X6 F7 p* }$ }& ?9 @3 @5 c
if energy <= 0 [ die ]
" a$ D* w& j0 i) | N9 y ]" |# C- T) k. d8 A; T3 D, r% _
end5 B ~% r# t* b5 d. D
to regrow-grass
4 o8 d, C, P1 G- l$ z+ D ask patches [
6 {& g8 E& w% U- `$ R: L, A" } if random 100 < 3 [ set pcolor green ]
- `3 ^( k6 D- _! M. T0 } ]5 b% f6 o0 G% n* M
end$ F" S( J/ l# t, r! T
to do-plots5 q, x! \; u4 }
set-current-plot "Totals", i; w+ ^& I8 w+ K; O
set-current-plot-pen "turtles"3 f7 F J( B# q0 U
plot count turtles
W* ^6 T. g) u' p+ ^4 H set-current-plot-pen "grass"% n+ o/ o9 T+ W! f
plot count patches with [pcolor = green]8 C# E; e4 M0 K( i6 `1 x p9 I; L
end
4 E, {4 M" b; M! h( q2 @+ ^可是运行时提示no such plot: "Totals"
# d! P+ T4 G" c) }error while observer running SET-CURRENT-PLOT
1 f( \+ o* {2 S5 Q3 G called by procedure DO-PLOTS& ?3 t& A9 W5 R: J7 t: i& W
called by procedure SETUP
# Y& U1 R/ Y* k: ?) p& q( w called by 按钮 'setup'
2 Q4 m, R) q$ U# _8 F求大神解答啊 |