我编的程序如下turtles-own [energy]
% S/ N, N J5 ]& W' R: S+ I6 mto setup
p$ H P1 y0 [8 T8 q& V" l clear-all
3 l8 q l, c8 p+ Q setup-patches
0 P! I+ o% s: t- T4 `* S5 q create-turtles 100
' `7 A; V7 M1 `. H8 ?6 n do-plots1 a* }$ P3 M) K/ U/ P
ask turtles [ setxy random-xcor random-ycor ]
" C: \4 U( Q! Q$ s2 x" E4 {end6 M+ I7 O( H; g9 i: k
to go! i. D$ E9 h" S3 k$ s5 Q
move-turtles5 v; f- q }7 W* A b b
eat-grass
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check-death q, z" ~& t& i( R
regrow-grass
?0 B' C/ {7 _2 L. f do-plots
" _7 D7 N( a. c. U, zend
: f& M5 T/ ~( r" W) Rto move-turtles
2 }2 E& E6 n9 ]+ @# H ask turtles [! n# u# u. c' J" j2 T! r+ F+ v
right random 360$ V& C0 \5 }: g( Z4 s1 i1 u
forward 1
$ p3 K# x" C E9 j4 G/ ^% O. j set energy energy - 11 Q* V1 |9 Y$ x `% G- X8 u, U
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end
1 p7 c9 F5 C, v* P* g2 [) ~6 bto setup-patches
: s9 z7 E0 [+ J; ^& l ask patches [ set pcolor green ]8 a- d/ ]; U7 L3 ?
end
# N4 k; G( N, @/ x$ |: Uto setup-turtles+ y3 W7 C m+ ~
create-turtles 100
& F: c* M5 e/ j9 [' L9 T ask turtles [ setxy random-xcor random-ycor ]
, q; {3 p: `* ^, N; z0 `end
3 V [/ T- @% L* G- kto eat-grass7 U" r6 H! r3 E8 {0 p' {( j
ask turtles [$ `9 a6 `. }! f1 B
if pcolor = green [) r+ l. S& c* o. m6 j. j8 u' H' d
set pcolor black, h% J; O7 B5 q
set energy (energy + 10)
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6 f+ l( {1 M! v* N ifelse show-energy?; o7 Q$ z& v" w, v6 `9 _
[ set label energy ]
$ z; e0 L2 \4 {; C; V( E: P: [ [ set label "" ]) i0 r5 ]' k3 J4 Z
]: \2 j4 c% V4 ^" A' S1 V" ^
end
: I0 N; a; |. L- S0 V, F. B4 uto reproduce& P9 ?+ y- ^! E% x2 G5 B+ a
ask turtles [2 ^6 W4 P# H* l0 C9 D
if energy > 50 [! y% M, @! |! Y8 S5 b2 o: _
set energy energy - 50
0 w, c) h0 \$ E4 w& ]8 k hatch 1 [ set energy 50 ]8 p4 O z. G, W+ e( ~4 N! v* t
]
' l2 N5 L, R. d# r( E% Q ]
, f2 ^4 c1 D6 {- ]end
1 i ]$ u" Q, S$ g$ v7 cto check-death
; x9 q6 O' J2 a: x- X3 l ask turtles [
/ ~# |" M( U9 ]6 `6 F/ @ if energy <= 0 [ die ]
) v# T8 c2 p9 E. ` ]
- l9 q, ?$ I( ?$ _end* }# ?# A$ Y- v
to regrow-grass! v# L6 s5 B+ f( c1 |0 P: ^5 }
ask patches [6 w$ \5 w2 A. {) q: m7 D5 h
if random 100 < 3 [ set pcolor green ], x" J" d$ x9 S
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end
: V1 m+ R3 B" Wto do-plots
2 D! j9 ]2 m% X: ?' c# M7 c set-current-plot "Totals"$ W/ S' [5 h7 O0 u1 I( q
set-current-plot-pen "turtles"! g' l2 c3 M ^$ B/ b. Q/ X( ~
plot count turtles
, P% D: f) J- K set-current-plot-pen "grass"
0 x& \1 v" b6 o& T& K9 d" ? plot count patches with [pcolor = green]
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可是运行时提示no such plot: "Totals"/ N6 k" B. n2 w
error while observer running SET-CURRENT-PLOT
9 F/ G3 X( n0 g9 j called by procedure DO-PLOTS
! n5 Q' a$ t! l/ D called by procedure SETUP7 }$ C) r9 s& i7 y, M
called by 按钮 'setup'- c- B7 p" ?- R
求大神解答啊 |