我编的程序如下turtles-own [energy]' M- F3 Y7 N+ A
to setup
5 ]! O9 z4 B$ P% l, ?4 q; O clear-all
4 A/ H: d8 D9 P- ~5 J# Y4 V setup-patches
" p; L1 c6 F& l/ J create-turtles 100
- M! g! b/ y w3 \ do-plots
! a" G7 v+ B; r L4 l ask turtles [ setxy random-xcor random-ycor ]$ [1 J* U* X- D X: x4 @/ y
end* `5 b( X" i" Y2 O+ \8 Q
to go
9 U- `. C9 j+ S/ Z move-turtles
4 N- z" o0 g2 \ eat-grass( s7 r- j! I3 g, u! r; | ~
reproduce: l; W( E+ N: e5 W7 f
check-death! `% F2 n, k! n0 E
regrow-grass5 i, c3 \7 {* u! c7 D5 H
do-plots# c- {. f5 }* J Y8 L
end
2 H; a5 z0 A, vto move-turtles6 v$ R9 W- L( c* ?2 s2 S
ask turtles [
1 d! ?' X1 }, z. q' \6 s right random 360" H. X+ n/ t7 j' i2 G: v
forward 1
0 Z" }$ t, p4 h4 B set energy energy - 1, N: K$ s6 ^: W% @- Y% F
]5 I& m+ f9 ]" E* @
end2 s8 I5 e3 a4 d: L/ |% j8 S. b
to setup-patches: Q" ]# j1 h0 j5 n6 o7 @; N
ask patches [ set pcolor green ]/ q q/ N, r! s$ w
end
2 U5 a" O( r9 t! P% O) hto setup-turtles9 i/ {* S0 q+ E3 ~# c
create-turtles 100
! S/ P& n( W& ^- \0 F b! r9 B ask turtles [ setxy random-xcor random-ycor ]) v$ h, X, S( N6 I/ P P
end+ D" A: M/ P. R$ L4 f
to eat-grass v4 F! U% _! T' J. {. `+ b
ask turtles [
( j4 q* X6 u: k: f0 T: A if pcolor = green [
8 w; r. \, f6 T' F set pcolor black1 m( f& [6 r) n
set energy (energy + 10)
: A! _$ }$ H, Q$ F" ^1 f ]" e5 c! J2 q: o, Y
ifelse show-energy?
3 C& `% }2 i2 f, S, W [ set label energy ]
5 H* L2 D W0 _! }. a. o+ c5 i6 p( Y [ set label "" ]- ]' n; b' u4 |" l. X/ R) m6 x
]
9 m4 [! s5 }) ?" `! K3 ]8 s2 `2 ?end7 ^( j& Y% d3 F8 Y8 n2 x1 |
to reproduce
& e& }8 J# b; v ask turtles [( g# q9 h; ^- {
if energy > 50 [" H, ^1 I4 F) L8 t% X: J" g
set energy energy - 50
# _7 ]0 |; s8 C M$ Q' M hatch 1 [ set energy 50 ]
/ v& q! s* `* f2 ?* `& ^( | ]9 X& T- x$ I' ^! k$ \
]. V% W- x% @- ~$ F. J& x/ T4 }. L, i
end
- M1 Z0 \) K6 f4 ?9 e% yto check-death- W) T) w( u* L- l% @7 J2 \1 \$ k
ask turtles [0 b q- ^' R8 z$ }6 M) h
if energy <= 0 [ die ]# b9 A5 V! g1 E2 Q; [
]3 |, f. T/ ]) L4 ], |
end) B5 q. I, h: G) r1 m% L6 X
to regrow-grass
1 i" b& k/ e* P- g, u0 I ask patches [6 v. w" Y1 i$ X7 R% V% S# M
if random 100 < 3 [ set pcolor green ]
: @0 x5 G. X3 g, s ]
# }9 v" u& D y/ Vend! g5 y X* ~3 v3 z% Z
to do-plots
: p" l3 K' | X, m, d; T5 Q. P set-current-plot "Totals"4 h8 h( V9 ~ d7 l
set-current-plot-pen "turtles"
* p( B3 x) _* L7 D/ g2 A plot count turtles
$ g" E4 Y% Q$ Z2 y& w' o* i set-current-plot-pen "grass"
5 e7 u3 Y, H( Z4 ]" \( g7 P plot count patches with [pcolor = green]& |, H, h- {/ W7 B* d- K% k2 T2 o1 V
end
* ]+ w# ~: v, f, l5 j$ N可是运行时提示no such plot: "Totals"
# u9 a# f) z: S- u e- O7 Berror while observer running SET-CURRENT-PLOT' F% v5 [" g$ A8 Z# c' g
called by procedure DO-PLOTS
' S+ r+ b; o% S% b8 ^ called by procedure SETUP
7 u0 c( N; r! P, J l called by 按钮 'setup'$ h, |# m: m2 n# T ?
求大神解答啊 |