我编的程序如下turtles-own [energy]
I2 l, Y1 Q" u( Zto setup* v# t' u7 w1 f# ?( b
clear-all8 c. f( N' j1 [0 z0 _
setup-patches
* [) D2 k4 s$ n4 |2 j. q9 k) C create-turtles 1006 l. P8 q Y, y
do-plots
0 @" S2 E6 Q- S* I1 W9 o3 _2 w ask turtles [ setxy random-xcor random-ycor ]. S5 \! e8 G0 ?& [
end
6 B% @& Y5 V- \4 \+ b2 _$ Sto go) d9 J2 ^. y8 L9 Z
move-turtles4 s3 x9 b2 m4 j
eat-grass
# D" ]: B. a1 C+ @+ K reproduce5 K+ s& e( R' u9 \ L' X
check-death
* C6 x1 @) C; ^ regrow-grass, {% o( B: }9 T7 U2 i8 T
do-plots6 c6 P1 e/ k5 N) v* k4 l1 N
end4 V0 Z9 @7 I: m# j; U
to move-turtles
/ B# o5 o( V) |9 P+ U$ J& `& e ask turtles [' q, P& t7 l6 o$ ~: e
right random 360
$ q8 y% K7 P8 h# s, F" M$ V forward 1
4 n5 n- N5 }0 }/ Q1 q set energy energy - 1: [% e& I& T: W% E/ @; w
]
* g! X$ f o/ Eend
1 e3 [- Q& {( k( ]2 Z' \to setup-patches! f% O0 B0 |2 o$ `; p4 _7 a2 O8 C
ask patches [ set pcolor green ]
) T4 o6 w/ u5 M& R1 r. t1 d; _# }end# S9 q! G: N3 }3 t( x
to setup-turtles
; @8 i* u; ]- J5 F5 l% V( { create-turtles 100
. n$ w! u/ \" z! _6 y7 L- \ ask turtles [ setxy random-xcor random-ycor ]
/ o8 ?4 T# h0 j* c- Qend
J4 O% {' J+ K- e7 y8 ~to eat-grass, q/ z- z: `0 z0 p3 {
ask turtles [
8 `/ y! T' A+ B0 n, ] if pcolor = green [
/ @& n7 p {0 P set pcolor black! J- z, a6 q% q! ]0 u1 G( w
set energy (energy + 10)
, j' \- d1 I. O: j- z5 l- D2 n9 Z7 F ]
' S0 k9 M, J$ [4 a* L; H+ a ifelse show-energy?5 `$ {$ U% C5 p9 Y) a& d
[ set label energy ]
$ |( y8 [ M8 ^ [ set label "" ]
: M1 G/ |9 P" K2 d# s& ^ ]0 ?* E- l- C! l/ m; p* ]
end
% S5 a% Z1 P' B# M l8 C9 \+ u- \to reproduce
* V# t* C% ^. p, T5 [ ask turtles [
. S8 H$ e& b& n0 f if energy > 50 [
* I8 {: ^' \. |( D9 O6 w set energy energy - 50* i2 U8 j" D$ X% m
hatch 1 [ set energy 50 ]
2 A: l6 b& }& h' M! R ]
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end
" b$ p6 _, X5 X H( Wto check-death+ Y, F: @/ k# H) H' i
ask turtles [
% }7 G+ x+ g1 E( y if energy <= 0 [ die ]1 o7 s% t1 V; [0 l. J& }
]
% X5 e: m) c l4 _end7 u% r' q; K" d& Q
to regrow-grass
9 E g& P( [' L/ n v7 z ask patches [" c e6 j- q( p4 \4 C8 ?
if random 100 < 3 [ set pcolor green ] `! X1 q! I0 h" I
]
9 Q6 @: ~3 R) P/ N5 y) eend
& w/ @; I! d! c# w2 ^7 W1 g! j$ Pto do-plots
5 |4 c( o1 ?" d set-current-plot "Totals"
m8 w: p; z) u3 H7 a set-current-plot-pen "turtles"
j- U' b: O% g: v( b& M" e2 F plot count turtles
, y7 Q, K( a- n1 W1 T/ k set-current-plot-pen "grass"
5 T; Y8 `* Y5 Q- }/ h plot count patches with [pcolor = green]/ d, N! t4 c7 C K- {# Z
end
7 L9 W) H9 W& x1 z% s* V0 D4 @5 V可是运行时提示no such plot: "Totals"$ `( M! v- a' O- e% l
error while observer running SET-CURRENT-PLOT
% W7 o4 E- D" C/ A* f# \( I+ [ called by procedure DO-PLOTS B' s" n5 T% c( g
called by procedure SETUP
c: E6 v' o5 X* J4 {! D0 s! b- K called by 按钮 'setup'
5 n- I" b' \2 P1 }5 R求大神解答啊 |