我编的程序如下turtles-own [energy]
' g1 x% X u" ato setup
0 c; t* \ v7 r* \1 c: }+ Q clear-all
7 l& u: ^- v) n3 K setup-patches
$ }# _# ?0 Z! {8 d! U, B) t create-turtles 1008 z x1 i7 J6 ^ o- A) ?* b
do-plots
# C; P8 Z# f- r9 K$ c; \0 q4 c! m ask turtles [ setxy random-xcor random-ycor ]* Y8 x/ U% P" p7 L" x1 @
end
% h7 R: y1 f% ]6 S% t+ j% Q3 V6 x6 R0 Yto go, t1 [% K8 |2 g
move-turtles$ P0 J% P$ [+ ]0 E' z
eat-grass
) i( M# f2 \; ?6 K4 I reproduce+ Q7 @+ {, G( T. n9 n
check-death
* D/ T9 R2 d; Q9 Z# T* B; s regrow-grass) Q' u5 {7 [0 g; F3 K4 ]
do-plots
! d. O- c2 q7 r3 e3 @- q3 dend
2 W2 F3 n: _6 i& B1 c* A$ p& B. b$ gto move-turtles Q: y L: t" {$ ^0 h }
ask turtles [/ T) }9 f% y2 r! j6 h% b/ \
right random 360( b' p3 [+ n: W% j
forward 1) X( l) o5 p, c. S3 S
set energy energy - 1
s) M$ D y/ l: s; G3 @ ]4 }, W! U1 V% d7 s
end
0 l4 K, k6 ]# b2 A+ X9 D' c3 Q+ S6 ]to setup-patches4 G$ H1 e' Z; ?# d& H2 v: O
ask patches [ set pcolor green ]
( D- l: k% c! \- kend
. J3 l9 m+ k% u' i9 g1 Ato setup-turtles
|! F; D( t! a4 N; g, ?5 b create-turtles 100
3 L# S" X! n/ h, k5 Q ask turtles [ setxy random-xcor random-ycor ]
, D. s" z" i5 e) tend
7 C8 J I* c0 R. _% D( b9 jto eat-grass
. ]7 \4 c# e( c8 q# @: ]3 [4 | ask turtles [1 ]# x, ~; O+ O0 Y" F) i
if pcolor = green [' f2 E" z' \4 o8 l0 x! `" c
set pcolor black. S: w9 t2 o& T" ]
set energy (energy + 10): |6 }, c' a* T6 z- Y& L
]( a# c. G. d8 P( d
ifelse show-energy?
+ e8 X4 ?! Z! f- x2 W g3 I& u [ set label energy ]
3 v, |3 Z* M* g$ [4 y2 D/ Q [ set label "" ]
; {% |# {2 ]" E+ f; h ]. w( [, ~+ u5 H9 d( @* Y) d
end
0 p! ~# Z. ~; t. Q8 k# P9 xto reproduce3 F) X- i9 d9 t1 f' G: F7 \2 w1 C
ask turtles [
2 D. X% ~5 P7 C* E if energy > 50 [* ^& b# n0 a: v& d5 N; P6 x
set energy energy - 50
5 p, |% u2 S7 i, a3 u+ b hatch 1 [ set energy 50 ]5 |- u' }& i* t' _& D
]$ B6 G' v7 x6 W" [& }9 X
]2 `0 S% i* K; j+ m
end# E2 T" m& T% C! v
to check-death
5 r5 H8 v; w/ u( M ask turtles [
! }2 E' Z T3 l8 [8 B if energy <= 0 [ die ] N" Q. K, M c) }( i
], I: ]( j. B9 v3 b
end
/ ?3 v9 Z6 ?; Fto regrow-grass! `4 D4 q# ?- q1 j# T
ask patches [
$ Y/ w$ H: y) ~# |5 ^ if random 100 < 3 [ set pcolor green ]: L4 F3 _8 }* U; H9 i- j
]
4 O9 F9 Z" x) lend
1 F% n8 R0 ^! Z! ]" {to do-plots5 L. P: Q5 x! U0 _5 c( q
set-current-plot "Totals"4 H) q0 U2 E# I$ x
set-current-plot-pen "turtles"6 d0 H' n6 K) O. Y. S. z% T" ^3 r; T b
plot count turtles
b, W8 e: L: A5 V set-current-plot-pen "grass"3 D2 u' R# ?5 m9 h" `) Q
plot count patches with [pcolor = green]! R% ]9 p; l. g2 p$ b; c
end/ C, m$ o0 z ?3 `( k, j
可是运行时提示no such plot: "Totals"" v# E* b8 g' q2 O
error while observer running SET-CURRENT-PLOT/ ^; v4 M6 b9 q+ ?: _ F
called by procedure DO-PLOTS% U$ n- A* b1 o7 K) K/ @$ r% C9 R h1 b
called by procedure SETUP" S' l; ~( G) ]% ?9 d
called by 按钮 'setup'
) c/ A s4 p& ~$ V& t, u* r求大神解答啊 |