我编的程序如下turtles-own [energy]
) \' s, P& a/ ~& i) Wto setup# E% _1 }- S5 N: ~- j. n# ~3 l% m3 Z
clear-all& v- J, J9 m9 F4 `- A0 a
setup-patches
: ~0 D, J0 P' r$ W create-turtles 100
; d! E/ U; l6 \- X4 Y$ G: z do-plots
3 B# }4 q3 J! l' ?: }+ ^1 \ ask turtles [ setxy random-xcor random-ycor ]
% z5 { p: E. e- a% E4 `end
, P( Z9 C3 m) q* t" W% lto go
+ l5 t3 X' h5 I2 z( ~ move-turtles
, q7 G( f0 K0 P' V2 R eat-grass
& ?9 k" x j. s6 W- H& | reproduce) @' l7 G4 {0 @" I& Q; [8 i
check-death
?* Q' o9 ~+ }6 V* t regrow-grass
% ?' J* d0 [2 ^( t, ?2 | do-plots! W2 h2 J, p; e- k- m
end& S" O/ M8 [) h2 ~7 S7 `' t! c% O
to move-turtles
. r0 B6 @( P# Q ask turtles [
( G! N1 T# n5 Q; H; N! L, ^ right random 360) O/ m# T: l+ u% S
forward 1- e m# s# e5 ~/ Z G
set energy energy - 10 E7 ~$ c4 ~5 c5 I6 S% ^9 t$ ?8 K
]
2 e' h! K$ r3 `end
6 {1 A" E# R4 l: vto setup-patches
! A& H) u7 U# i* B4 ] ask patches [ set pcolor green ]- d4 U, G: T+ p$ _( ?7 h. l
end
# S5 E- d }5 T E3 Zto setup-turtles
" L0 T, d4 L2 R9 q6 z create-turtles 100, ~' I. h- _4 e3 u, W& C
ask turtles [ setxy random-xcor random-ycor ]: ^, R) Z' O) `, K' y2 \; n3 K
end; ^6 \0 N5 E* O, ]: M- C. b0 e! \9 h$ ]6 J
to eat-grass
6 k6 u& k) v- {# q8 c1 R ask turtles [
5 ^" W3 H' N7 @! k. n/ p. [ M; d if pcolor = green [0 _) A! Q9 f4 e
set pcolor black1 \5 m4 G8 _) l
set energy (energy + 10)
& \5 q# t( y" h8 k+ u) | ]$ C+ Z$ R( T# l% l: u) t
ifelse show-energy?% {3 w# v# [ C0 u$ J2 \
[ set label energy ]
) s" T$ ^. ~7 m5 D- I [ set label "" ] @& O6 `3 L, J/ E! A% v
]
- \) O9 g3 P8 U b7 P% {$ w9 Q/ V4 send
6 s; G# ^: j) u' R/ x8 W0 pto reproduce
: _/ w! J9 c3 y1 y3 @1 `/ m) n ask turtles [* r* ?+ w4 m0 n' G0 n
if energy > 50 [) n" |6 Q3 K$ L
set energy energy - 50
6 d# a! L1 D, s& h) D& P/ {& I y3 P hatch 1 [ set energy 50 ]
0 v: ]$ }: A& T& k6 K% U5 [ ]+ J2 p6 X2 `$ D' V) x% P( \
]
9 I1 l8 c/ T' A, Fend! W" x! z* P" X
to check-death
1 {8 W1 x: n$ X9 F4 z z u+ d9 g ask turtles [: y; g( {7 E* S) w$ t
if energy <= 0 [ die ]- X7 w6 M# @' @6 q7 [7 W' c" l9 E5 m
]9 C: X% u* ]( C/ ?% |/ O9 f
end7 l7 `. b! }" u
to regrow-grass6 |- C' {! T" ?+ f6 N( F% y
ask patches [- e3 b/ a/ w3 i% l0 P9 D
if random 100 < 3 [ set pcolor green ]
! C) P8 s; p; W0 g/ _ ]
1 F! p4 |3 e2 S0 R7 iend$ u. z( W/ D) M! Q" |5 E/ h" y- m
to do-plots3 L; V& O7 b- t: s Q( h
set-current-plot "Totals"4 F8 X/ P: H/ |9 j
set-current-plot-pen "turtles"- d; v G& i6 G2 T( A" d$ F
plot count turtles
4 h6 d! q2 w- s! T. a. {8 X" q set-current-plot-pen "grass"
$ K' L4 @) S6 o; v% L* h! n plot count patches with [pcolor = green]
' E* Y$ W: {4 F, a5 t' W8 Mend
- \! E I, c9 p9 k7 ~& F3 E可是运行时提示no such plot: "Totals"
6 X! D, ]" [) [1 l' N1 D/ derror while observer running SET-CURRENT-PLOT
) J6 h/ F- M' j7 X called by procedure DO-PLOTS
+ z; n& `1 k$ H! p called by procedure SETUP
5 p" c. m- M1 G F8 s called by 按钮 'setup'
; `+ O5 ~ S G5 x, E' v3 J求大神解答啊 |