我编的程序如下turtles-own [energy]$ t" K+ ^# d& |2 T
to setup
z0 Z, a# b) W1 |! y clear-all$ P% N, h9 D& K3 M$ B3 G' R* f* E
setup-patches1 B7 c: c1 U: s& l; G
create-turtles 100+ C$ y$ m0 T9 h" i) m- v* F% g
do-plots
8 X8 c' L8 c5 g2 a6 @) u ask turtles [ setxy random-xcor random-ycor ]
% J1 C9 f- h' l: w9 _0 v1 p9 }end; n3 M) d/ T6 {# B5 U, Q5 S
to go9 N3 z8 i& R9 j& y _
move-turtles2 g, h# }3 O. A
eat-grass
- x5 R& G+ F* q. L- h2 ]1 P9 h2 O, r reproduce
6 `5 m9 k) a$ G/ t check-death
$ z/ f+ l( N& {- s' v/ ^ regrow-grass
3 c% m( a# h9 e) I do-plots
! `# X2 n. P2 lend0 w0 b& ]! I' F7 U
to move-turtles
) ~, A. M8 |" n+ \1 } ask turtles [
( D+ c% M. q5 w9 h: K& | right random 360 z, H. u) @: @
forward 1
/ O; {: \/ x. X: @; j6 s set energy energy - 1
- p3 d* A1 u0 [6 r% C ]
/ F" r3 a/ }8 N9 @. o0 s! hend
; }/ F+ S9 @4 ]; O+ @to setup-patches
! v0 S( H) n% ^- H9 C& } ask patches [ set pcolor green ]. R7 U5 P m7 L* V2 |4 ~4 A
end
; B" c F- F9 Oto setup-turtles3 O% B/ r. B2 e9 p( }; z! \
create-turtles 100
1 a8 B4 T5 r% L4 {- q7 V" N ask turtles [ setxy random-xcor random-ycor ]
/ Z7 I2 y# G* H: ?6 l' E. n- k2 dend9 J2 z; M5 M/ S' i$ R$ _
to eat-grass0 }. l7 h1 W* s0 i- g; w7 A
ask turtles [
4 d0 N; H0 G9 `7 y$ B if pcolor = green [
' t% `* _5 T6 {: I$ P; i3 Z set pcolor black
& e/ J' Z0 v7 }% v" h% P& }% z set energy (energy + 10)3 O7 W2 b9 W8 Q7 d
]
9 C1 Z* ]8 L& m" S' p: J$ M5 p ifelse show-energy?
( d! k5 q u& Z [ set label energy ]
9 |0 g3 x2 e/ X, m6 D7 y, N [ set label "" ]) c: z# A, Z4 d- P% s
]
7 p2 o _, I2 jend
% H2 j6 D( I$ H. y! E) N: g6 Bto reproduce8 |% S2 a: N8 w, F* T
ask turtles [
9 U9 q. F' Z; ]6 Q if energy > 50 [
2 Q y/ n# ^2 m set energy energy - 50! |" A6 h6 U- \* |/ F- z
hatch 1 [ set energy 50 ]
# d' o. X }* |7 M8 o! [ ]
2 z0 d2 B* Z- `, U9 w ]
' Z6 z9 V, d4 H3 d, xend
4 U7 H# ?" l+ g+ g+ G2 L. Wto check-death
. [# k$ m1 D7 H# Y, a! M ask turtles [
6 j. B, g' N G3 J, S. b( r if energy <= 0 [ die ]& n r* t: L0 G; k+ T; ~) t) M% l
]0 o3 e1 N0 a$ a* t( @% B7 |
end
r$ a$ @6 Z3 Q$ _3 T! d ~/ Tto regrow-grass( r8 l+ c& x$ U2 }
ask patches [
8 j7 o2 t7 J' |$ n- ?3 {7 r if random 100 < 3 [ set pcolor green ]) R% x5 z ? D6 a3 b% K1 \
]
) E8 ^ k' G- X) O- r o1 |6 Eend
- S/ C3 L5 q$ W3 ^0 i8 u( Zto do-plots
, L# W8 j' C. Y, L set-current-plot "Totals"; V" c$ Q" ] l! I
set-current-plot-pen "turtles": C1 _" _# N, m; D; ~; w
plot count turtles( z9 a: B7 b+ h/ V! r) V8 d
set-current-plot-pen "grass"3 P7 n; ]* M0 v$ J. N
plot count patches with [pcolor = green]3 R6 P' [5 L; [3 p
end. C, r& p) E# b2 y3 l
可是运行时提示no such plot: "Totals"9 E* n: L( G1 T! I8 I1 l# s9 B
error while observer running SET-CURRENT-PLOT4 H& u& p% ~7 V* }
called by procedure DO-PLOTS
, ^, ~( ?3 T; G e* E called by procedure SETUP
" D6 O! F7 i% Z* W' D called by 按钮 'setup'
% U& j0 `) R# U% E' i$ D& _求大神解答啊 |