我编的程序如下turtles-own [energy]
4 |$ C* E- _0 ^4 nto setup2 u- A2 u* [% Q- X M, `- i1 W8 P
clear-all7 p' G9 F( `. \/ ?) C
setup-patches
; {" K0 y6 T' U; j% N# _; o! G9 t create-turtles 100$ x7 ?# a1 y6 s
do-plots
* l" t9 v9 n0 h$ @& X8 `+ } ask turtles [ setxy random-xcor random-ycor ]7 K" P4 k4 ~) ]% p
end
9 W, u; n& ]- Nto go
5 e9 x* n' R0 J7 i- k( W move-turtles( v3 k u# U! Q
eat-grass
2 K* E" O+ t$ @ reproduce' V% @6 }# P& U. c" i5 W7 r
check-death4 s1 c `" F J3 G+ @; ?
regrow-grass8 f* T! B8 B# z! |" I% ?8 J
do-plots
8 Y8 L. g/ V/ g4 C5 Send
' I: [& a6 y( N) |" A$ g- Rto move-turtles
, b' n7 J8 }; g) ^ ask turtles [
4 g# d. d0 G5 s) V( Q* _ right random 360
0 K3 I- @, ^/ C+ | forward 1 N& ?( } M( x4 [) B
set energy energy - 1$ w* q! `! r& \* w
]8 P' `8 ?' g( e$ U# R; {
end
6 F& t: m8 {; m8 Ato setup-patches
: T1 K# G% q" l: z ask patches [ set pcolor green ]' ?* N! {. ~0 B1 F4 ~' g
end
* q8 Z1 n$ J! X/ Z+ v9 s, ~ Gto setup-turtles
4 x& h$ E1 N- Q- r6 Y2 l; E1 G create-turtles 1000 \8 U9 X7 P/ u, j' u5 O
ask turtles [ setxy random-xcor random-ycor ]
6 a4 _' j7 h% G& b+ L8 ~2 r! Pend
) C6 B- y7 u% K- ]% tto eat-grass
: f) W2 k* c6 Y4 r3 R. {$ C ask turtles [% t, q/ G, e2 m5 Q; i
if pcolor = green [
" y, p' ^8 V7 y/ P ?8 M set pcolor black3 ^7 r" ]9 e" C. M$ ]: X8 e
set energy (energy + 10)
5 _, ?9 H/ M6 o0 g0 s ]
) t1 z7 H: `1 `0 E4 t ifelse show-energy?
1 P" [3 A: R- X5 o7 j8 j [ set label energy ]
( B! p/ B9 D9 |. y1 T [ set label "" ]
# L# J7 `; R! q, d a7 q ]
8 y2 c( q9 v k3 }( {* q% Vend1 X+ p; _9 D0 C8 H# T% {" m9 a3 z
to reproduce. r7 a: |" s0 i7 C+ q* o# w4 Z
ask turtles [
5 ~0 P# J% _3 e3 S, p2 i/ ]( E if energy > 50 [
9 o7 W/ G2 p% b8 r5 A- L set energy energy - 50
' N1 ^: _( O8 g hatch 1 [ set energy 50 ]
( h: `% E% c- a& m% R ]) a9 k. W7 `$ B X6 V
]
# h7 _) b8 c6 Rend4 A- P @0 d7 Y; B
to check-death
3 K% M& ?9 d3 t ask turtles [' G) m4 f7 v( f" E, y) a
if energy <= 0 [ die ]
( Z" e" h8 t7 p6 ^* c9 U7 X3 O ]
& E& k9 _! G5 V* C+ tend7 q1 `! I' E' Y/ N
to regrow-grass
" z3 O" g% `! ] ask patches [5 s5 y" D c( K2 U) }8 ~$ e7 u
if random 100 < 3 [ set pcolor green ]. _9 L. F! X' _, B
]
; w8 L/ L9 Q2 ]" H1 n+ Dend3 Y* o' j+ ?1 z( Y! P$ o; y
to do-plots
j& R* {: `6 ~9 F' c( p: R, F0 A set-current-plot "Totals"7 l) ?% B3 r$ | ^5 K2 @
set-current-plot-pen "turtles"
: ]/ Y6 J! G0 _3 M# p/ }, b plot count turtles
' J0 r. c0 n/ | set-current-plot-pen "grass"1 }' a8 t2 f* t
plot count patches with [pcolor = green]. K6 o1 L8 d. J, L
end0 ]! ?5 A: u$ e) B6 q6 l
可是运行时提示no such plot: "Totals"
; p) U$ J4 l( s% G4 [" h- K* Ierror while observer running SET-CURRENT-PLOT, M; l5 a- b% ^
called by procedure DO-PLOTS& l7 v9 y3 O' c, k, c$ G
called by procedure SETUP
7 V3 {( l4 i1 S- A$ _: j2 O called by 按钮 'setup'
- l% u7 u: P# T求大神解答啊 |