我编的程序如下turtles-own [energy]
/ q5 B/ n# K/ a. Zto setup+ K" p" o7 c" x- b" _' d, |
clear-all( x" ?- N4 [ y! V4 ^3 K- c! c3 I
setup-patches
- O9 c4 m R7 s9 \1 G) h5 f- r create-turtles 100
0 O. x3 v; {& a' i, `# C& m5 I do-plots
4 U8 k: _$ D# K. [) \ ask turtles [ setxy random-xcor random-ycor ]
4 o" b) {$ a; q& _end
2 `6 H5 _# X; A g9 x0 m) pto go. W b6 O6 z+ f4 c% k
move-turtles
' _. {) ]. T& y q/ x- h eat-grass O8 ]4 d- s9 U" Z' c0 h
reproduce, q2 s7 x" \4 Z; X3 M& e$ y5 y
check-death
4 P# `- v( k. ? regrow-grass
, P( U9 {% S6 W1 @( \0 S! S2 C1 S do-plots
3 q2 m2 A, A2 x5 Oend
( ]9 L. N. I3 L, Kto move-turtles$ x, b. h3 r! f2 X/ B
ask turtles [4 Y% Q" d& c* k
right random 360% H5 J( ^( y9 [. s$ B
forward 13 T S. w9 X& y# [8 L
set energy energy - 1; c% t+ n9 l* @$ \
]
y! v9 `3 u# g( q/ Wend- O8 ?# p9 P- L7 Y- A
to setup-patches
$ s, k$ z" J7 Q/ I) f ask patches [ set pcolor green ]8 Q* e' M9 t( v: ^; Q: k
end
( [0 U8 e1 x F( D4 \: ^+ S+ F1 _! e9 hto setup-turtles+ K/ z+ U3 S4 d( p7 G% G2 _ L
create-turtles 100
+ `/ j0 b; E6 B, u0 ?7 U( Y ask turtles [ setxy random-xcor random-ycor ]
2 u( e- N) z- \. y7 [, e. pend2 _- \% q4 ^, S; t
to eat-grass8 e9 G$ [) C$ O' }, } T( h$ `. G4 L
ask turtles [
l$ q, m+ V1 R( b% A if pcolor = green [6 R% J9 Y8 D0 ^. n
set pcolor black
1 q0 x" c" k& S set energy (energy + 10)
" k# y2 t: o/ T8 D8 m' z$ F ]0 S e% H A% p0 Q$ ?
ifelse show-energy?
& a" \' q, n+ j! U1 p9 v4 k& o [ set label energy ]
8 c2 u5 k- a! y5 q! c& { [ set label "" ]
: G" t1 I. k$ F ]
l6 K: M5 A, Lend
5 g. x+ Y; r L: C7 ?# j- k+ Tto reproduce
* S) n' F4 N. C7 r. X. A ask turtles [, g2 _) O0 r$ Q1 {1 o
if energy > 50 [6 s+ {( @: N+ D2 R
set energy energy - 50. C. X8 ]9 w8 c) u/ h4 y
hatch 1 [ set energy 50 ]. i5 Y: N: N+ p- I2 n7 u; q6 |4 H
], [! l: d+ h3 u& G3 b* @" E# t
]
5 `1 C+ Z1 O- Qend
0 u+ I; O" @6 l% F% O1 j& X7 Y4 Kto check-death S @+ G2 o P6 R8 b7 ~
ask turtles [2 a% n b! |1 a! x" c( L9 E
if energy <= 0 [ die ] k1 |' L- p9 L
]
$ K2 P( k, D9 c0 K; {end
@8 E' n, d8 G5 c Xto regrow-grass
4 z) u! a- y$ v- N2 u! m ask patches [
# Q$ v' T& _, B# n; M, E if random 100 < 3 [ set pcolor green ]
8 v, Z0 ~9 i1 @7 y8 q: }3 _4 p ]
0 U( a; v8 F0 }. }' ]end
3 ?8 ^& f3 Z- z9 V9 Jto do-plots0 J# F& C1 i2 n7 @/ M- E9 f
set-current-plot "Totals"
) K2 o8 Q& p% u* Z8 d. i set-current-plot-pen "turtles"& L$ M1 H7 ^3 O+ i! I/ y1 d% {3 T
plot count turtles- G6 J6 a* n# p* p; O
set-current-plot-pen "grass"
7 |5 v o. j8 ~" S$ s+ ] plot count patches with [pcolor = green]
' b( ]; Y$ U: c0 e& oend) q! ~# k9 ~% U$ M
可是运行时提示no such plot: "Totals"5 N1 z7 }" }2 ^3 c2 [7 N
error while observer running SET-CURRENT-PLOT
. I+ a9 t# T! W1 I called by procedure DO-PLOTS
# p6 d* F" T# N called by procedure SETUP4 g" p* S. M7 Y5 l
called by 按钮 'setup'; L9 N8 O& ?' f" z" ]
求大神解答啊 |