我编的程序如下turtles-own [energy]
. ?% T7 ]6 j8 i( }4 ]) U1 ~to setup- f4 h0 P* K) N( E+ O7 z+ v v
clear-all
) [7 `+ P+ L1 M) H3 Y9 M: W5 O* q" ~ setup-patches
7 l7 C" E% b) M8 R5 V create-turtles 100
, K0 l& k) I/ H, D2 _' x; {: I& Z do-plots
1 b" S- P$ A% M/ y! E1 s ask turtles [ setxy random-xcor random-ycor ]" ^6 g1 U0 q6 D5 `& p) Y& L7 J
end) O9 x" D! T5 ^( `4 ]
to go+ ]8 o9 B+ d, A7 g/ V3 l
move-turtles3 Y& `8 s" s/ u
eat-grass
' e) ~9 @( B2 l9 I6 }. u reproduce2 {1 x3 u3 Y) v s* H. L: }
check-death$ g; ^, o: L7 r& ] J& b b
regrow-grass: S7 f* A/ x/ f: Z% X" }3 k- {, m
do-plots2 v) t- |* o) u6 d6 w! O' H
end, D3 d' s e& A% _
to move-turtles
* s* M9 I9 z. a" G+ E4 p ask turtles [
0 Z& ~( W. q1 b' n" R1 X Z8 a* X5 P right random 360
! D+ f# f7 t+ n& o forward 1$ \/ U. ?& Z* T# k
set energy energy - 1
7 Z( `' n& U- q ]3 k! Q* C2 W. s8 ~8 N
end4 V) E9 p1 o+ R
to setup-patches' f' ]2 F7 ~3 F, e
ask patches [ set pcolor green ]
3 _6 }4 i8 u: I, z Uend
- \$ f5 q! k0 t( Cto setup-turtles( k8 o8 E3 P# P2 |
create-turtles 100
/ L2 q& [. O4 f ask turtles [ setxy random-xcor random-ycor ]; r$ y% F" S1 u5 [* F. O w
end O, T1 |5 P5 a/ p; C; P
to eat-grass" G8 h4 y# ^- N* C6 F+ b4 {8 M
ask turtles [2 S1 ^3 b8 p$ e* k0 _, R
if pcolor = green [
/ d8 ]: O$ {) a/ y { set pcolor black
' b% t! O1 C# | set energy (energy + 10)
) d, W% M( u& D- a6 V; _* v# C ] ~+ [2 M8 j( f/ g+ Y
ifelse show-energy?
u. E* A( d$ N7 Z1 h [ set label energy ] w0 p `* l/ V! G5 K" W: W& U8 ?
[ set label "" ]& d/ s5 l9 Q3 ^0 Z# r: c5 e
]' Z5 B5 ?. K o( x9 R
end
& k w1 w0 b% g) {1 ito reproduce
6 n) [% c& b1 \, w/ u. }9 N8 A ask turtles [
: W% Y0 a$ Y7 R* h% l- n# |% U; ] if energy > 50 [2 {6 w0 F8 y7 |- S+ w3 n
set energy energy - 50
4 S1 h5 C3 {- ~ N- { hatch 1 [ set energy 50 ]. g3 E( r$ v- Q0 P4 Z. N
]
! w3 O9 v! {2 X% Z( j: B: \: ] ]$ I7 Q" ~0 z% q- f# v7 ]9 o# K
end
2 C; S, c$ d7 a" G7 a( M0 Q" Bto check-death, J: z7 }3 V0 _. _, f. `
ask turtles [
, I+ M- H X5 ]& j" X. k+ p if energy <= 0 [ die ]
( e6 z7 A0 ?8 n% {$ h3 K ]. @3 s. ~3 f5 R
end$ A' _& ~: X* B( r8 r. K
to regrow-grass# {$ o# {/ o7 L& S0 z7 D
ask patches [
3 s% V- ~! | H; U* t ?* A! _ if random 100 < 3 [ set pcolor green ]
; s7 ~) y, o# o- j B0 V1 w ]
5 U1 m& f; W7 f/ Tend/ }: k' V9 V8 }4 P$ i5 b8 Y
to do-plots% U! y2 l- }; W
set-current-plot "Totals"& a& u8 `9 Q, }
set-current-plot-pen "turtles"2 `2 ]4 Z+ ~& h. p, x# s
plot count turtles
+ ~0 W. a! Y: C n( u0 U, c set-current-plot-pen "grass"9 B. C R `8 }2 X
plot count patches with [pcolor = green]
# ]- U; n1 `9 i) e9 ~/ M- p, w2 Z! Send
/ x. g3 {- u( ?: v: m, Y- l# ~可是运行时提示no such plot: "Totals"
9 R6 |3 B$ ~/ b0 C2 b5 v# k$ X. v! Nerror while observer running SET-CURRENT-PLOT. O. d$ W, U3 K
called by procedure DO-PLOTS. n( U5 P9 }5 R! H% N! h
called by procedure SETUP' J# v' R, ]3 V: R
called by 按钮 'setup'
& i3 C- U* [# n/ D3 L- l求大神解答啊 |
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楼主
发表于 2013-5-29 00:25:38
