我编的程序如下turtles-own [energy]
+ K3 q9 K. k; j& p6 i- ~6 bto setup7 F( h6 H+ l% w) {1 s V% j
clear-all) u W5 ^3 q1 q8 p0 k
setup-patches9 `* N u+ ^- Z2 c* V
create-turtles 100
% W( u5 J& }# u& T/ R/ ^ do-plots& z" M% u& y) Z/ l; T/ t w5 d
ask turtles [ setxy random-xcor random-ycor ]
+ b" F: d) J( O' qend) } f! q! \3 C. R* c
to go( ~, z4 g' T: `3 N$ h5 g
move-turtles
' y$ k$ m2 x1 v( A7 _9 y, Q0 N0 R eat-grass
/ R2 u3 }) U' {/ r8 Q; x6 h/ y reproduce
" y1 y" _( x. G0 }( x check-death
- }! ^0 ]4 q4 d regrow-grass1 j! W. n3 ~6 x: N* I) E" V
do-plots
$ l5 _+ C7 }5 N3 D4 Vend
" z$ A9 E" \$ o: y: T: ]# M& Nto move-turtles
. F* H8 x0 p6 z& Z5 d ask turtles [7 F( K8 _6 B+ m8 S! F
right random 360% p# }, m7 f0 R% F
forward 1
3 M2 x: H0 e( x, | set energy energy - 17 t* j1 a% ], L0 M
]7 G( Y) H( O7 S) x2 c, K
end
) f+ a+ w' e8 O, Wto setup-patches/ J: h! T8 U$ k. K E1 ?3 O. L4 Z. h
ask patches [ set pcolor green ]
# }9 O6 K! a% Iend- i p, n5 P) i4 B+ l5 k7 @
to setup-turtles
6 K0 V5 \$ M; m+ |& z' _4 x: @# f8 } create-turtles 100
2 a9 W# n- x8 P' H7 l% z ask turtles [ setxy random-xcor random-ycor ]# F) R* g5 m1 I0 m" H% ?2 \
end
5 [# Y% }1 h" Yto eat-grass
# K. |0 p4 I$ p( L. m ask turtles [; X) m9 r. L, l6 y! x% {: Z
if pcolor = green [5 Y! R$ k3 b( F/ M
set pcolor black0 Z* O2 `( u0 r0 D" F# d
set energy (energy + 10)9 T) J6 P; Q9 o {" D
]
/ H3 b) U. U' U/ }6 e) I ifelse show-energy?' s5 ^% j$ x! e& g' `7 O' G6 Z
[ set label energy ]
% W% O, u. v; v5 L6 x- [ [ set label "" ]! c. a7 b$ E( B* `+ m. D; k( ?
]. k0 `2 L3 e+ v- v- L
end
) C( e8 c0 Q: Xto reproduce% b1 \% y. m+ [
ask turtles [" J1 I( e( N( C5 }& w! m! ~0 M6 F
if energy > 50 [+ N r: I n$ Z' v! q
set energy energy - 50
1 y: \+ ~ z( g( M6 q& _2 _ hatch 1 [ set energy 50 ]
( p0 ~* d9 ^/ o0 c% P+ u/ y8 U: N ]
1 M+ k9 d3 {/ k& P+ P! l. v+ C1 x ]
" P; [/ c1 u8 D. `8 {/ {/ [1 vend
, c: _" U( h) hto check-death# ~/ [: l8 J+ a: C
ask turtles [$ o5 k `% ?. k8 {: s) Y- z3 x% S
if energy <= 0 [ die ]! `! A) W5 x! s6 ~" b& C$ V5 W' d
]. }# _" M7 F, T' K" ^
end: C) L% }$ u+ g6 } y- Y8 ]
to regrow-grass9 R7 `! g4 r7 P$ p
ask patches [
! V+ M& x) E2 b" L8 M+ ]5 @ if random 100 < 3 [ set pcolor green ]
@! b5 e! n6 d" E$ i ]. y/ z; G2 ~0 R$ b
end4 x! U) }/ i/ ^
to do-plots
+ N* R0 O- O9 z set-current-plot "Totals"4 M; L4 f. g! h2 x0 V) J9 _, @
set-current-plot-pen "turtles"; W' ~: s% v5 i" \( g
plot count turtles
0 ^1 r( E" r u5 n* h) F set-current-plot-pen "grass"+ H. w. V: W P5 i) O, ?0 E* D1 v
plot count patches with [pcolor = green]
# M1 O# S/ K. Z" E2 v4 K Vend4 u* Y9 ^& F: v& y) j. b: x
可是运行时提示no such plot: "Totals"/ J* n; Z- J* o) C0 y
error while observer running SET-CURRENT-PLOT
; W$ W7 u! n2 ]2 }# [% s4 B8 z called by procedure DO-PLOTS) {# Z# ^& k) Y9 h/ d6 A
called by procedure SETUP
H( D6 `8 J1 g called by 按钮 'setup'9 t. m9 P( Y2 M. o' H
求大神解答啊 |
[复制链接]
楼主
发表于 2013-5-29 00:25:38
