我编的程序如下turtles-own [energy]
6 V5 m' G3 o7 zto setup
) }2 v! l: }/ ^' t7 I clear-all
7 j7 E6 j$ l5 z) w setup-patches% T0 X0 S& s& `" T1 J m
create-turtles 100- ~1 [. P# `6 J9 Q% e4 @
do-plots
7 v. @! L: x" O4 X8 {4 g ask turtles [ setxy random-xcor random-ycor ]
0 A4 m/ t: C; a8 ?5 a qend
6 W9 l M4 J7 H( q4 ^to go
- g' c+ }; b* E3 I2 h* D) Y& L move-turtles r( A5 N. g- w
eat-grass9 V2 ~0 B1 ?4 X) n6 u
reproduce7 ]# b: |; O& X6 |5 o7 C! |
check-death
o( J& j8 ]) ]5 E* k2 K, [: b regrow-grass
! ?4 G, _) n0 J6 x3 A4 _& V+ O do-plots5 M, K& Z) L5 V% R7 O0 ^
end) C# U; d# G, q$ X
to move-turtles
* o# [" D% |$ S; b# g0 j( z- l \ ask turtles [
4 C) P+ X9 Y8 g/ j2 e6 M8 W* I right random 360
t$ _1 m1 ]+ P. c, ~( x forward 19 K6 F, C% R& G- K6 k/ e
set energy energy - 1
- z D: p/ p3 A' d$ {. V* v# @ ]( K j R( g$ Y; K6 @
end5 }; p) y3 S* J7 z
to setup-patches
+ K9 n7 ?( w! \8 E. D2 x ask patches [ set pcolor green ]
Z7 k7 z: H) qend. U( p& D; }# @
to setup-turtles
9 M* }# T, a( n" Y4 D5 p/ G create-turtles 100( ]; I3 f: u0 f# s9 Q3 T" q
ask turtles [ setxy random-xcor random-ycor ]
! I$ e# S# Z9 ~* J( X6 qend
3 ? f! Q8 Y- J' c+ tto eat-grass6 W5 X- k) d2 D8 d' y+ ?, @7 l7 q
ask turtles [2 m! S; j2 _" ]( U4 s& N' L
if pcolor = green [9 a! o, J. U. N
set pcolor black. M8 g! [6 r4 C) T
set energy (energy + 10)
' H0 M. Z4 i! w J7 x ]
. Q: S/ I/ F1 ~6 Q ifelse show-energy?# S% p6 Y1 x# D" X) I5 \
[ set label energy ]7 l, X, d7 s: W$ F H, g
[ set label "" ]
7 A+ h7 h- l& _- O) j( G7 D% `2 ]: P ]
0 L* L- V0 d/ b8 [) \, F4 eend
' P$ }3 L: b0 f9 @; e& cto reproduce
7 L/ |/ W( G/ E9 B ask turtles [
3 [+ S" o' i7 T/ o) v7 G4 X9 j if energy > 50 [
. v' X5 e! i1 d1 h1 A set energy energy - 50
% I: @; {. P' H* y! M hatch 1 [ set energy 50 ] o5 E7 a7 H% D+ g$ e6 y
]& K7 L# u( F# x2 h9 b8 h5 o- F
]) W2 o& T- ?: ~* {% i
end; z! Q0 Q7 q. s
to check-death h4 x; d2 S7 I3 u7 \& U$ @
ask turtles [/ ?) q) E$ n8 ]+ b
if energy <= 0 [ die ]
6 \* _& z: m% c' P1 `1 K4 q" v ]
3 \. x) L) e/ M- K6 i* fend
/ L* z, i9 d8 wto regrow-grass8 c8 B2 a& U* Q4 K' {! W! b
ask patches [
8 T9 U: k8 b3 `# l; u3 C8 y0 c if random 100 < 3 [ set pcolor green ]
1 x- u1 B) K7 F0 {, `! X4 o7 i) I ]
* |( y: Z( H7 N" I& I u' zend
, ]$ x5 a# w6 u7 cto do-plots4 c* y Y) M, t, v6 n8 a
set-current-plot "Totals"6 y( }: L- J3 U" K" D7 B1 P4 x
set-current-plot-pen "turtles"
( I4 q* @5 Z6 \" P3 D& y, K plot count turtles
* {5 S: J4 x* S set-current-plot-pen "grass"
) p4 b. D# M% c5 p% v: c& g plot count patches with [pcolor = green]
1 t: } Y4 o( {8 L, M7 eend. _0 E6 S& A6 [
可是运行时提示no such plot: "Totals" v$ D0 M# B" A$ j6 c3 ~9 ? i% i: E
error while observer running SET-CURRENT-PLOT
3 U3 w: G; f' D8 [' T0 i called by procedure DO-PLOTS. s& B w% _# [# D! y* i) N! l
called by procedure SETUP9 S0 {/ U4 X1 i( j
called by 按钮 'setup'5 }5 V. h& c! [: \) F& f, ]1 X
求大神解答啊 |