我编的程序如下turtles-own [energy]
3 ^9 f) h& \; N# \* Q I7 [to setup, i W" l5 C: R! A6 \/ Z: F
clear-all6 q( h0 W" a3 m) z2 {! K0 O
setup-patches
6 e# r4 U8 [% j* x8 }) S6 u0 I$ Y create-turtles 100$ M6 \% ` c u
do-plots* v7 R6 B- y- W
ask turtles [ setxy random-xcor random-ycor ]
2 F: l. P4 L f+ ?8 kend- S* K" F/ l) E' X+ V3 J! ~
to go* L: s5 J9 S3 \8 D
move-turtles: P8 O$ D: `, ~0 p
eat-grass
# Z3 {8 h; X! _: o5 w reproduce, O& @* F+ @9 a( R
check-death
3 N) b7 S: l( g: K; i, b6 D- ~: e- M regrow-grass+ V4 u$ x+ o) s1 @" g v
do-plots* [$ F0 r$ W0 q6 N6 ?2 S9 h
end
' G1 }0 k: R, U4 C2 V+ ito move-turtles
8 X& D+ J0 k. O: R! r( `. g ask turtles [
; K7 i# B+ {- {! O, h" j right random 3606 n4 f* o" j0 d" U" M! `
forward 1% X" S* \& ^. _* N
set energy energy - 1- L$ e4 G% A# ~3 s B- u
]
% S7 ]- ]# h0 n8 n/ f; Yend
3 I1 T" x: [( s+ S# ato setup-patches
8 k3 {- o B" o L+ N8 r3 n* J; A+ w ask patches [ set pcolor green ]% E5 F; }! c% ]. }: J: }
end3 D: w: ]2 X& o x
to setup-turtles+ r- V. x& D! c3 [5 O' i0 t
create-turtles 1000 s/ ?, b& u+ ]; L) p: Q
ask turtles [ setxy random-xcor random-ycor ]
( i9 s* t: z [% h# Y, _end* k$ b q% P \% B3 Z
to eat-grass
' F Y y' d' w) Q ask turtles [
5 n. s: ?( K- l8 s) i% x$ o5 j3 d if pcolor = green [
; Q5 p# y% l+ h9 H! ] set pcolor black4 w2 `$ R: M# g) W5 a+ _" W
set energy (energy + 10)6 t* d- d! D' K$ Y3 F
]
( j$ [" @6 q6 u2 x ifelse show-energy?
k: a6 `( u2 @! r" ^# l8 n [ set label energy ]- i8 k0 x/ C: a5 @
[ set label "" ]: @# ]$ b a2 S
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end: v0 C/ B0 q! B& G
to reproduce8 r' g# o+ q3 `% B* r7 p" X
ask turtles [: \4 o" A; S" d6 r7 N
if energy > 50 [5 L* _# A+ p4 q' ^/ H0 Q+ D. o
set energy energy - 50
# {9 i5 X1 a j2 Z' e. ?! } hatch 1 [ set energy 50 ]% A7 U" b( F" Z/ }# c
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]; u5 a$ h3 n; b$ O1 _% q$ u
end
0 X7 @& p( u4 l n! fto check-death1 O( m5 D7 W4 b4 F- n
ask turtles [8 v& b+ X' x; r M$ u6 C: M) y
if energy <= 0 [ die ]
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end! E3 n5 ^9 E& ~) y1 a$ x
to regrow-grass; h6 k7 X; H: {4 L# m7 ]
ask patches [
3 b7 F% X8 m6 C/ X if random 100 < 3 [ set pcolor green ]
+ I' q; q( {, W1 m ]
6 z! ]8 n1 ~1 q2 g. u( S4 xend( d2 v: q* |% R3 b1 o
to do-plots
/ g" ^/ |% B2 A set-current-plot "Totals"9 R, a7 z( e8 M0 S2 X
set-current-plot-pen "turtles"+ ]* y6 w! P$ |
plot count turtles
: _/ t7 Y! e0 k2 r9 ~7 B set-current-plot-pen "grass"4 Q3 g' c8 d$ u/ t ^% f
plot count patches with [pcolor = green]
+ R% R: g: E6 e* b3 d6 R' W% u2 d$ T7 kend
2 B6 R; t- `% `0 x( N8 T可是运行时提示no such plot: "Totals"9 g) E; N' m* o, V: l/ z2 S
error while observer running SET-CURRENT-PLOT) y+ k4 g4 O; a0 k4 j. Q1 i) @. K: J( R
called by procedure DO-PLOTS! e* u: p7 a+ P6 E8 d, l
called by procedure SETUP) `! L1 D/ _( e1 X& e
called by 按钮 'setup'2 H2 C8 x" Q' r# H1 ?
求大神解答啊 |