我编的程序如下turtles-own [energy]
( U$ {+ w/ I; a: k# ]to setup
( @+ |& O+ _% Q7 K! g5 ? clear-all/ O. U( J/ R0 U6 o' v6 V7 h7 q( z
setup-patches
$ \$ S, n9 U7 J& h create-turtles 100
. D L) ?& z9 l6 U" V do-plots! O7 n# |" O a
ask turtles [ setxy random-xcor random-ycor ]
# g- \/ ]0 o, Qend& h$ I6 D8 y8 D* S6 o. n- a5 D
to go
. Z9 L2 |9 o X3 G% ]0 b# A+ C9 p) z move-turtles
1 C# x' G/ _, J6 N6 m eat-grass( [( T: x3 M+ P
reproduce8 B1 z' f& X" q
check-death
$ E9 P4 W0 ?6 J% b( q5 s* Y regrow-grass3 ]- L: K* [: i8 d% g7 p2 I$ b# U
do-plots
+ s* I2 W* a5 u B& N1 zend
# X7 R8 Y8 d3 m8 @, Jto move-turtles
3 \( I8 u6 h0 a( K8 B6 ~ ask turtles [ C, h7 E+ P" a0 l! x
right random 3607 c- o7 V) i1 c
forward 11 S6 ~; J. s1 e/ i$ q9 K
set energy energy - 1% Y0 O- ?) Q/ `" v& P9 |
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end, p6 u' B& e( c0 k
to setup-patches# q2 z) C/ L! E6 B ]; _& x
ask patches [ set pcolor green ]
$ h7 s& ^; Y X1 ^7 z8 u# Pend. Y1 [4 e( W: q% W/ Q# q5 |9 p
to setup-turtles
2 E# F) R: A$ O4 R- p7 k create-turtles 100% K. l% _3 |2 v* b$ i" o" m4 ~0 l, ^
ask turtles [ setxy random-xcor random-ycor ]1 y8 K& ?/ v% a$ R8 v5 N6 G0 X" c; ]; [
end
1 g- W- e$ S9 ~6 e. z% d Ito eat-grass
6 n( f+ z' M8 ?+ M: X2 O8 B ask turtles [6 ]# Y, @6 W' }
if pcolor = green [+ @1 T' R' L. i/ z: I' s
set pcolor black
. P8 O. @4 m" i7 B6 w9 ]7 ` set energy (energy + 10)
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ifelse show-energy?
, ]7 a$ `7 k: @ P } [ set label energy ]
2 {$ J m; T0 h$ z0 _ [6 n [ set label "" ]$ S# z0 T0 z; j. \
]
& M0 N% I6 e1 v' j1 pend& Y x x0 D0 P, ?: ~1 x( Z
to reproduce
% Y' U: O6 \$ h+ a. g ask turtles [
C' U7 }; F% e( F+ M' [ H if energy > 50 [" C( i/ ^/ b* k
set energy energy - 50
, Y% H, D6 J6 @7 C! ~ hatch 1 [ set energy 50 ]
; w6 J* ]0 o5 h3 S7 Q/ L& d ]4 B. s# Q1 t- [) s# O
]
6 t& F- B8 U! h. X* r9 ^end
9 U8 {$ g; v0 m. q; a* w: x' cto check-death) W$ F! C) B* b- @
ask turtles [
5 @3 e$ ]0 t$ L' ~- w2 h1 [+ } if energy <= 0 [ die ]& Y( Q, u4 @2 ?! R
]6 B _7 `- V5 {8 W) E9 n
end
1 h8 G5 ] J* g! rto regrow-grass( x* ^% ]2 G- W/ o7 D
ask patches [+ \) o4 ?/ M8 O* Y
if random 100 < 3 [ set pcolor green ]$ F# Y* U2 h" B7 J: r) i# B# m
]
, k# H. l7 @4 \3 A5 D% ]2 U. }* nend% H8 H+ x$ @) i9 S: H& b* y( d
to do-plots
) }+ x- C# {/ W* [& F$ C) M set-current-plot "Totals"
. }' _( A6 v) l" w0 X* q set-current-plot-pen "turtles"8 O2 A1 c6 O0 h1 B
plot count turtles5 w) |# z- @9 h0 l7 L! J
set-current-plot-pen "grass"% U7 }- R, C& r9 X9 H
plot count patches with [pcolor = green]
$ L- g; v7 q7 P3 wend
2 u9 k( {8 G2 G2 B9 d# U8 m2 T可是运行时提示no such plot: "Totals"; J6 A6 E, Z9 l
error while observer running SET-CURRENT-PLOT* D. f" }$ }* \7 G
called by procedure DO-PLOTS J" B$ S; \4 E+ A/ L% ]" r
called by procedure SETUP
) K7 g9 ^, K( i called by 按钮 'setup'
/ S8 b) m% p, I1 K5 n7 B- O求大神解答啊 |