我编的程序如下turtles-own [energy]
6 Q3 W( `5 R0 t$ e& R8 ?4 ~: U! D: xto setup
2 C: j- H4 n+ r) ^4 K, c: h- O clear-all% L4 w1 N a4 ^0 `
setup-patches# d* |8 {' _' i0 r% `
create-turtles 100
3 F0 l& E' k L# f$ y do-plots
- P$ K. I. x6 F" b4 s2 W. B# N ask turtles [ setxy random-xcor random-ycor ]
4 a$ j6 A& o0 j8 H2 Wend
7 t1 x$ u9 a8 Q$ i4 oto go
2 T+ {3 P! M$ c2 z+ j move-turtles
4 O* p/ D: y& o3 g! |7 }+ P( d) h' N eat-grass+ L: `/ w. p7 y3 X5 v
reproduce
6 a* c3 G# x6 e9 h' I7 \' I check-death8 N1 X* G" I2 y2 d1 l
regrow-grass" W9 t1 {" R0 m% h" a. I% m
do-plots- z* U9 Q- i$ n! Z+ @6 N
end3 S2 Q& x- y# A* T, u) K
to move-turtles6 J( G h g* T \7 j8 w
ask turtles [
0 D |3 k( C1 d3 t/ c0 a right random 360
5 }6 `. X9 B5 I& k; s2 ?: N0 x5 Z$ U3 V forward 1
6 v, C7 s0 G# c) `+ o5 D5 Z set energy energy - 1
) d9 D' ]% Q" w+ c; { ]
7 S! J) O5 E5 g; a: Y8 W {end- `9 X, X( @0 U: ?4 S2 N
to setup-patches
$ \& A9 l' ^) O1 g$ y ask patches [ set pcolor green ]
" d4 G2 Z% n0 R' d% ?0 Zend
" U" t2 ?2 i9 |; J4 qto setup-turtles8 \9 I3 A( }% K/ x1 N
create-turtles 100
% _9 T+ M. P- l1 f/ J( s. P3 ]2 ` ask turtles [ setxy random-xcor random-ycor ]
3 f q4 x4 H/ s/ l) T# m( H8 hend# F3 t9 G! ?7 S: B# e% }
to eat-grass4 S# S$ Q. I; n* V; ^) u, s
ask turtles [
6 T9 n, u- H+ ~ if pcolor = green [, U% T& ?7 y8 |- ^8 y
set pcolor black4 E0 J8 W2 o, I( w3 N, H. i1 a
set energy (energy + 10)1 \1 r' `/ D5 i, X7 Q
]' n9 z( f4 _. I, x1 k" y
ifelse show-energy?1 G4 s/ n1 j, C9 Y
[ set label energy ]
" n3 l4 v' ~' J* W$ `+ Z0 H2 b [ set label "" ]( ^1 v0 s5 | U
]
. A4 L7 b$ |% d f1 xend
) y" }8 P L; g [to reproduce
" A2 Z* F( t9 O. D! \ j7 W( d ask turtles [1 A u, J8 ^8 N3 q1 q* A
if energy > 50 [
) f# {- b- @0 i! `1 W& [: x set energy energy - 50
. N/ R! o2 ]7 Y1 C% R0 F, G hatch 1 [ set energy 50 ]- n+ i1 w9 V A5 H: X: m' |9 k4 x0 A
]
! L: h7 W) R: F, p ]
+ o \: H1 O" oend: ^9 s' o( X* _! d. z
to check-death8 q6 ^4 t% }6 O5 h9 j r
ask turtles [
: j; y* P6 n! z if energy <= 0 [ die ]
& h/ q7 Q, J* [! w7 e R# } ]
, q% v- f" b" z$ W+ f' [end
( I/ G9 @+ J: m8 V* Lto regrow-grass
/ f# A7 S+ a5 @3 Y9 S* P% a- ` ask patches [4 K- l0 I: T4 \
if random 100 < 3 [ set pcolor green ]
! Q% o- v X! ]2 E9 P ]
) g4 t/ G' W( i. c" cend
1 h4 q0 u* @" W: ^to do-plots
% {$ D% h( V) \, k set-current-plot "Totals"1 I2 R" L+ ?/ _& Q& j, t
set-current-plot-pen "turtles". e9 o7 z) O# d n
plot count turtles9 g5 r( O2 L$ j7 W5 ~* \* ^
set-current-plot-pen "grass"- r3 A' e2 n4 }9 n) X5 I# x3 s
plot count patches with [pcolor = green]7 }+ e/ X& _( `4 L+ p( |
end# K/ A3 n, k9 y! ^# `, J
可是运行时提示no such plot: "Totals"
( o( \8 D0 q( h. e7 Jerror while observer running SET-CURRENT-PLOT
5 R$ E5 [1 ~* A+ M! J7 U/ e called by procedure DO-PLOTS
4 T6 e& K& k: m: \ W: { called by procedure SETUP0 }& L" T) N& E
called by 按钮 'setup'
: X, Z' j h" M$ @求大神解答啊 |