我编的程序如下turtles-own [energy]
8 U* {' U) q0 U3 A/ bto setup7 a3 y1 e; Y* j. u3 U$ x
clear-all
2 I6 K4 O" c- _1 p" e setup-patches
+ Z8 {( Q9 [. W& T' E" Z/ p create-turtles 100# `# S+ F' Y1 Z8 v2 D p* j ?
do-plots
/ C# i# E9 b# H3 M( l" S6 X. j l2 q6 G ask turtles [ setxy random-xcor random-ycor ]
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to go) j c) F$ r- o0 g" S0 B
move-turtles6 a9 w3 u2 s$ H8 {
eat-grass
. ?: h1 A$ W, v# p reproduce, @; P# Z8 ]8 x
check-death- v0 B( p1 b* A" m% S3 j
regrow-grass- `' ^: G9 P# k# h
do-plots4 r! J2 b5 y6 I* \, `# `* I# P
end
% m! E% X' f9 l. w! w% a6 {% Gto move-turtles* _- k- ^4 ^6 e
ask turtles [
; e* |* O+ R9 v8 {% J' G& v right random 360
+ B% b `7 U' |' t1 b- b- v forward 1( T4 T; h5 @0 o0 j* t* t( A
set energy energy - 11 I ~! i& k* z' B1 L5 T+ p
]
7 ~4 \/ I0 h# A9 Zend
' ~' o/ q U8 j: ]2 H5 t4 T" Z: sto setup-patches
! o1 \; f! T7 U* ?$ p" y& l$ j ask patches [ set pcolor green ]! ?* X; h3 e; d5 c. @
end
$ ?, |9 |: U6 s8 a; _- @; {to setup-turtles
9 { Y# e+ t7 U3 z5 v. _ u+ I create-turtles 100: A+ _+ m4 D' W* I$ \0 N: ~$ H
ask turtles [ setxy random-xcor random-ycor ]
3 b" Z0 Y) w0 i, R: P2 A, ~# tend; ^6 M8 x& C1 M& c5 U# {9 x
to eat-grass
- X1 [+ h% V) P% [! j ask turtles [
8 S' y# B- Y2 V- Z% X% ~% X: s! \, p/ D6 r if pcolor = green [0 j0 ]6 ?2 A3 }! ^5 L7 q+ }
set pcolor black
, e) `* a% B" f7 b set energy (energy + 10)
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ifelse show-energy?2 t& `' p0 ]3 L% G# i
[ set label energy ]
( M. ]+ N% v; T$ p, ^8 [6 S! g [ set label "" ]
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end1 }0 b+ a3 H6 o ?
to reproduce
9 H3 P/ c0 l) T ask turtles [
3 j: g* L9 b. W4 S7 q if energy > 50 [" n; s8 v% j+ y/ f
set energy energy - 50
( F+ H2 q- b0 J4 \2 R: L hatch 1 [ set energy 50 ]" \4 b# j1 G \4 [6 j% q% y& X8 i. `3 d
]
& C0 Q7 F. a8 m ]
3 ?4 d/ E$ `) j2 N3 C4 ^' ?, O5 mend4 i7 @1 F- ?& S
to check-death! @% }6 v4 r; u, ?) F
ask turtles [1 {* q3 R' {( I& v
if energy <= 0 [ die ]
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end& V6 ~# s/ S$ u8 ~
to regrow-grass
, `9 e* d( t" T" g( k ask patches [; [. l8 q) @" F' J j
if random 100 < 3 [ set pcolor green ]
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end& y. \+ L' |. c6 c2 w' ^! r
to do-plots# j a% C+ x! x! g/ I5 |4 S& u9 q( W
set-current-plot "Totals"
8 ]) u; f0 U+ M. j( ]! p, B set-current-plot-pen "turtles"
+ k+ _$ a9 W4 R1 }/ l plot count turtles
% Z: U; y6 L c4 z4 G set-current-plot-pen "grass"
0 j9 G2 q( A, h" `8 }2 ~. f plot count patches with [pcolor = green]2 B: J. j7 r5 ?/ [. q
end- X; {+ y) ^9 j+ b1 F# i0 s4 o& l
可是运行时提示no such plot: "Totals"" F+ W. u) r" u5 \# u0 a
error while observer running SET-CURRENT-PLOT
1 h" F, T) T$ m" }/ ^7 l called by procedure DO-PLOTS# z& S. U; K* c9 T9 ~1 @; m% n- i0 e+ X1 G
called by procedure SETUP
* `% ~8 S! h: A% ?# k5 ?( i8 Z4 I called by 按钮 'setup'9 ]6 i4 y$ j- Q1 F
求大神解答啊 |