我编的程序如下turtles-own [energy]
5 O% m: X1 ^& |2 u% d; {to setup4 g' V1 [- `# t$ S( }. \+ @8 x
clear-all
" o$ e( Y, b1 l) H, _ setup-patches( h. w; v3 S4 K) P# Q6 Y* j
create-turtles 100
: ~# F( F4 M5 w) [2 u( p3 J- i; G do-plots
& g9 R+ A2 _& D9 E ask turtles [ setxy random-xcor random-ycor ]' ]+ }# d8 q, c8 r
end
/ U3 L) @2 t" H# W, Q0 p& \9 Sto go1 }1 E8 z. e0 H1 ]
move-turtles
6 M0 F+ [3 _; ^* P1 V# z) E$ Z eat-grass; b) t3 G" G' Q+ `
reproduce
3 Z( e7 g5 l7 O, p) i check-death
: i5 n( h% T' R5 l" a% d/ w regrow-grass, w1 T/ H& U2 L7 N+ C4 n4 y7 I2 K7 ~
do-plots& \0 M4 O7 o5 E# }7 g% X
end9 k7 W2 {" w% q4 ?+ Q
to move-turtles2 m) l, l/ W. Q# q% j- A+ j/ n' Z
ask turtles [) ~/ h+ C/ X5 ~' }
right random 360
$ E2 T- |0 x7 M0 K( b forward 1
6 t5 }+ V8 p6 x set energy energy - 1# ?7 i0 C( b2 \2 w7 G. F5 A; k
]
! t7 p4 g/ C) {5 C$ M2 X' Nend4 B* G- I$ ?- P
to setup-patches
; J; ]/ r' i: p! q2 z" j ask patches [ set pcolor green ]
' T! W& _0 K: _1 C# Xend
3 D/ w0 \, B' W( C2 Rto setup-turtles% X* V8 e8 Y8 q3 d
create-turtles 1009 _3 S% V/ T5 y9 ?
ask turtles [ setxy random-xcor random-ycor ]! b, g3 S9 o* M4 C4 S
end
# m" k. W# t5 Y) L5 J- O+ S0 `* Jto eat-grass
3 t% [- y) E1 ^3 b3 y% h; d- s ask turtles [) U2 o# b: |; J- b
if pcolor = green [ F/ {" G. D+ j! O0 r5 }
set pcolor black
; v: T2 |1 n$ v/ Z1 l8 g% |! b set energy (energy + 10)
8 K H- a3 t' g e ]
1 l& i/ \% [) {) h; W: l% j ifelse show-energy?
3 k+ d5 f6 g2 O4 U+ p/ O: W4 t [ set label energy ]0 ^5 h! G5 L* ~3 E z4 `/ U$ ^
[ set label "" ]
c; I9 U. D# ~8 j3 Z2 l ]
1 |4 R3 t1 l( K% ^" y( Uend0 `6 O3 P8 W* w) K- Y
to reproduce1 [+ L& J; u7 W8 z9 n- Q
ask turtles [
8 o. n) g; L- f+ y if energy > 50 [
, _2 T& a" g+ y set energy energy - 50
" P8 y$ N6 u" n; ?9 t5 m7 r1 W7 x& | hatch 1 [ set energy 50 ]
# p9 t2 _! q. W' Y+ k9 _ ]
- E9 J% n8 |/ J1 Z" Y+ h" T3 n' ^ ]8 g# e/ g( H4 w% k( P6 T
end. `. V }. I% J6 F( I4 j |) `4 H
to check-death
( w& S( F, s4 c- z8 D: v ask turtles [
8 `, V! x+ X7 a' t if energy <= 0 [ die ]6 ?: l( Y$ h7 E- y; k. `+ y5 \
]
2 P( |5 I$ `# Z+ n/ ~% H+ _' V8 Tend
* y2 M) f" z! G' K% k( ]6 Bto regrow-grass
" y+ c/ G. t" B: e1 Q% @( W ask patches [
) p. P* M! u( s) _ if random 100 < 3 [ set pcolor green ]: M; y* V: m( d: D1 r' ^* ]
]
1 Z) h, T3 k, b& X0 yend
- V; M5 H9 Y0 g! r; w5 p. r: Fto do-plots: Z! p; v9 w. \# \, G& @( T+ w
set-current-plot "Totals"2 L- m5 e3 p& }8 E6 L' {8 [; q |
set-current-plot-pen "turtles"
% j3 y& A8 b! @) k0 g plot count turtles
. n7 @+ S3 e8 }5 k set-current-plot-pen "grass" h7 f2 ?4 [# L+ {
plot count patches with [pcolor = green]' K+ `) w( L, D& ^6 f) k
end
* S8 D1 O, V8 M, V' u可是运行时提示no such plot: "Totals"
0 f3 R. B2 W$ n& |error while observer running SET-CURRENT-PLOT
! u; q3 b3 K& F/ T: R g called by procedure DO-PLOTS' H. q ~! A0 Y% _: t* \
called by procedure SETUP5 F3 S9 {6 j3 h+ O
called by 按钮 'setup'
4 ^5 y, d, t) S求大神解答啊 |