我编的程序如下turtles-own [energy]" U) [! ?. ]5 s. N1 V# i5 D
to setup
6 ?0 l/ E" O7 o! c clear-all
' ~1 c. A. y1 }. x$ _3 | setup-patches3 W; J# F% b9 Y) f! ^
create-turtles 100; F4 P" K8 a9 V- m
do-plots2 z+ g' y+ S+ k9 e. j- m
ask turtles [ setxy random-xcor random-ycor ]& M! m; C7 S5 q5 O' w
end5 K/ P( N. M: R0 ~+ l) j0 O9 z
to go) f3 @% l* T% O$ Q, s. H" b/ `
move-turtles- V1 t3 W0 p1 S, O) d
eat-grass' g# ~1 d$ `% l$ i' O
reproduce
; Y: f) Y& R! k7 V3 I; i check-death1 ~8 b, z# L B/ x- h/ n( H- Q1 G1 i
regrow-grass7 g6 f R$ Y9 ~+ h" `4 K. e* e
do-plots& f3 r, W1 |: \; O, z
end$ D4 w9 T3 p% A' Y
to move-turtles$ E: b$ Y7 n) ^6 `7 F
ask turtles [
2 P/ i( e4 {3 Y; ?3 e% H7 J right random 3604 E5 W; d" j. p0 I3 a
forward 1" V4 V l- E q/ M
set energy energy - 1
]& | g0 J0 O$ j% | ]
/ o2 P$ C9 A% H+ D4 jend. x9 m: P4 h! M. m1 C: H$ D( S
to setup-patches/ B! a8 ]5 k( ?' e; R! l5 [0 I0 g
ask patches [ set pcolor green ]% m. t0 ^" V$ t) s8 E& V1 R+ i
end
8 A L- \7 }6 v% [to setup-turtles
' }7 f+ i' W) |! F8 M2 m& M( a! N create-turtles 100
! Y" v* H( ~8 \- h. T+ ] ask turtles [ setxy random-xcor random-ycor ]
+ T3 V9 r3 v) z; Send) I0 d4 p) l0 T) W& q; w
to eat-grass$ h0 N$ v& \3 s# K! \
ask turtles [
) M4 S2 E5 z% D W if pcolor = green [
6 Y1 q* Z7 |# x set pcolor black7 X- `8 v. ^5 r A
set energy (energy + 10)
3 u: ]9 S0 x, M( R- i ]' @, y6 d4 l: f
ifelse show-energy?1 j1 o, c o! A( t7 f' s4 p$ E
[ set label energy ]6 {' Q5 F! Y" d
[ set label "" ]
' `0 }6 e }. G0 P! O3 g9 a& f ]& l7 y( h/ R5 ^: c+ V1 P
end( U/ o) K) z9 V4 J8 C; k+ _
to reproduce
( R( X* N4 e5 `: S1 m8 v ask turtles [
) k' P% }2 B- @' y, \, I if energy > 50 [
" K7 C1 R2 {/ ?/ g5 v' B set energy energy - 50
: p) e. B8 c7 v, I* P hatch 1 [ set energy 50 ]
: }0 K L$ W4 o3 I ]' b5 _1 M9 k- M) ^, @; f
]
( J* p$ x$ i3 x4 `" [& ?' _end* E7 ~4 |4 |& x6 L/ N+ N
to check-death
! N2 E }' h7 a ask turtles [
% ?) @, v$ ?8 O( s$ |( M2 f. M if energy <= 0 [ die ]
1 B% k9 |# ]3 Y4 Y$ F' o ]$ |6 d2 f' P: ^$ A
end
; `$ z# |3 J5 w- ~. C3 zto regrow-grass$ N" J. }% e3 o' O" r- R
ask patches [
9 Y8 v7 w9 O. a; \- q+ W0 Y2 O if random 100 < 3 [ set pcolor green ] H1 p) g2 q- Q, f- g
]8 Y" b1 p% r6 U
end: k3 S W. m4 b4 P: ]
to do-plots
' `, W: j5 `- D5 D {, Q( b set-current-plot "Totals"
5 m- O1 w' A4 U2 `; J set-current-plot-pen "turtles"
& ^6 G3 p5 x1 D$ T plot count turtles# u; i- H# A1 ]: m
set-current-plot-pen "grass"
9 J- H2 I; `8 }7 Y plot count patches with [pcolor = green]+ h% i( }' R1 v W8 {
end. a9 u A3 q/ A( T1 j- |
可是运行时提示no such plot: "Totals"6 E8 S8 ]. }2 A0 _4 R
error while observer running SET-CURRENT-PLOT
- n; i* k: A+ ` F/ L called by procedure DO-PLOTS% a& e- k! i U# y( A
called by procedure SETUP3 `+ P) b0 t4 Y5 b7 G5 k& ^
called by 按钮 'setup'
$ r3 o; U; ^$ _3 `& }求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
