我编的程序如下turtles-own [energy]3 {5 z ^1 M9 D! Y0 h" `
to setup" y$ a4 U+ w0 j8 f' ^
clear-all
+ n1 m8 z7 v; q- } setup-patches1 h1 |4 \6 j3 h6 j8 \* s: ^5 q( b
create-turtles 100
4 k7 @9 D5 X8 [1 i do-plots7 Q" n6 V: u, K. p, L% ~
ask turtles [ setxy random-xcor random-ycor ]9 U9 h" I5 ]4 x6 P/ p- j' u
end
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move-turtles* r% D6 N& B; R) ?. t) e
eat-grass9 x0 }" p$ t8 c! b2 y
reproduce
8 i; {& X7 ^$ i9 ?/ y+ S check-death
- W, A% T1 C. T4 L regrow-grass8 B- U5 c# g& ]9 B( e4 ?
do-plots
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to move-turtles
' \+ ^3 u9 K! y( g' c ask turtles [; h% o; t% X8 X$ o9 o( C
right random 360: T' e F1 C* w4 N7 I) R* v$ k/ t
forward 1
( @5 ^5 i: |/ \7 q/ Z0 v set energy energy - 18 j/ a8 c% Z. _- S- j% r% @) T/ m: |* O
]
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to setup-patches. g2 X% i* c8 Y1 K
ask patches [ set pcolor green ]
9 E5 \5 h) S/ p7 Gend. s; v% o9 H9 `8 r
to setup-turtles: O# _9 Z" x- e7 Y
create-turtles 100
- H) {0 x" n# v2 s. X7 h ask turtles [ setxy random-xcor random-ycor ]8 R: I2 p, n- {* \$ q* M/ x- `! x
end
9 A- j5 i. V. q" e+ {to eat-grass
0 V! K2 N8 K: ^+ H4 v ask turtles [
/ e- `, O0 B: J3 g if pcolor = green [9 p4 C# b' d2 m* } b l
set pcolor black
5 H g( }/ A! ]3 L# B1 k set energy (energy + 10)
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2 [4 a& C' @, t1 h- u+ k S' f. U% r ifelse show-energy?
6 ?! [" Q( a& V# r! R [ set label energy ]7 Y: C, }$ n" B/ S5 B2 c
[ set label "" ]
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end
* P, U/ y1 Y2 f5 ito reproduce
) H# n1 B) w0 c5 w ask turtles [" i6 w, r$ q/ d
if energy > 50 [
$ S- o7 A! n8 i( ~ set energy energy - 50
+ W+ `# H) g$ z. w hatch 1 [ set energy 50 ]
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]0 s/ p2 U+ \( o1 {' t
end
" X/ i! ]( w9 W" Z e2 Lto check-death5 _) d- m! T$ {+ ^6 A
ask turtles [" B5 @- ?0 r9 q& p- Q6 F, I
if energy <= 0 [ die ]
9 u4 \4 v+ W- y8 C9 \1 ] L ]
4 a) Q1 d( |+ H, c+ nend
# p# o- ^! d7 C" }, ?/ kto regrow-grass
& _# [9 N. c% {6 m ask patches [
0 _4 A8 D. {& Q( X# [& j( m if random 100 < 3 [ set pcolor green ]+ [' @& O$ @2 Q
]
/ v% e. `; Z% A2 m2 U1 zend# ?7 d/ f5 k! ?& {& R; h, Z- M
to do-plots& W- j h3 P5 g& B
set-current-plot "Totals"- n! {3 O, P6 n: |# X/ K% O
set-current-plot-pen "turtles"2 F1 n, B! i+ I+ w2 r! d
plot count turtles1 }/ r1 E3 x7 A# ]% j) H
set-current-plot-pen "grass") L; }! r5 n0 L
plot count patches with [pcolor = green]
. e! n- A s; f3 Gend
1 U2 J. c Z: X- R5 U1 }可是运行时提示no such plot: "Totals"- E' _' t. I- C
error while observer running SET-CURRENT-PLOT) M- s/ K& q1 |. C& e/ @* |. b" H
called by procedure DO-PLOTS
# b- L4 _& r( S5 x* X7 h; B called by procedure SETUP8 X: A* z; r$ V: m: X2 I# e
called by 按钮 'setup'2 ]1 }! t: f; @
求大神解答啊 |