我编的程序如下turtles-own [energy]
0 V. @- g. k4 d; O3 n+ n7 Bto setup+ T0 \& J6 Z- ]
clear-all
, Z$ Q% [ ^! }7 y$ ?) ]% o/ H6 q setup-patches9 P3 }3 g+ k. x- H4 X; B$ U
create-turtles 100$ r' m8 T* y) ~ `) x1 |* r
do-plots
' j$ Z7 y' P$ s( q ask turtles [ setxy random-xcor random-ycor ]' _2 a: R' K4 A1 D: a# ~1 E
end
1 x6 M7 _) ?% t% ?to go
3 @$ J% ]5 C3 M4 s move-turtles
2 ^8 }0 m/ D( u- k: | eat-grass
2 \ e0 r' S9 Z8 f P2 j% i" p reproduce
$ u- z4 |/ ~% U* f1 H5 R g/ Q: U check-death8 [. G1 O; ?9 n0 Q! {- X
regrow-grass
: i! m5 a6 `: n) b3 {! U- w do-plots
+ s: V2 Y2 V s, w' j/ f, S% v7 W( B5 Vend- d$ T7 ^/ Q; C5 z3 Y3 _2 j
to move-turtles
6 h* L3 j$ j5 L; i: ?$ I ask turtles [7 z# F( T2 g9 N6 T
right random 360
4 z% g; m4 L; A forward 1, r5 Y6 G1 {# k9 o9 O
set energy energy - 11 |* ?1 e' t% Z3 R1 c
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end
G9 d7 S) l+ P' O. W" _$ I9 R3 m6 \to setup-patches
0 p2 y0 \2 S) f9 j ask patches [ set pcolor green ]
* i5 k" N" T# u+ P5 g2 Send8 H6 F+ S3 T+ x# m
to setup-turtles
1 r3 `9 G! n# B2 \ create-turtles 100
9 ~& R0 w; B! J# e7 o. Q. K ask turtles [ setxy random-xcor random-ycor ]
& |: t+ h. L h+ |: Aend
. [- {4 T" L; E. q' w3 f Hto eat-grass8 O) N4 r- Q# w5 A( _8 y; ^+ H
ask turtles [; g/ n' V" j- e; Y! A4 u2 X- Z% |
if pcolor = green [( T& @* d3 r, b z4 H
set pcolor black7 q0 N8 }, l7 j: ]% o* f' e
set energy (energy + 10)* ]5 B4 y2 z- F. ~ p9 _( x
]/ L+ m/ F' Y, ]1 b
ifelse show-energy?
. Q, m, ]# a: l! [& f1 v, a1 a: U [ set label energy ]; ?7 E: r$ U* h+ w" s- O* h
[ set label "" ]
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* |8 o+ y/ p/ j' D" v. Iend6 S$ [3 g7 x* O' g( v0 s$ p
to reproduce
& y/ n. {0 r) c. t0 Z J ask turtles [
$ n% O- s4 K' |# V- q5 \0 n if energy > 50 [, s$ a6 k$ X% y
set energy energy - 50, L2 ^' B" p% }
hatch 1 [ set energy 50 ]
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end
. j9 I7 T' P* _- q9 R7 Ato check-death3 ` F0 u0 r6 r7 M$ [
ask turtles [
8 R- _ }8 `3 H5 ? if energy <= 0 [ die ]/ `. v. m& }# F. W$ |0 T, i7 a8 a& h
] j& t$ z% v6 |) ~
end; M9 t, u9 D' {4 J6 z
to regrow-grass% ~: k4 |- C8 M6 @7 _4 L
ask patches [
5 F0 d2 D( H( z! \( z W" A3 I if random 100 < 3 [ set pcolor green ]
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to do-plots; g3 O& p7 }7 m& F: b, ?6 V
set-current-plot "Totals"
1 f5 G# Z+ ?9 t5 @% f% c7 P set-current-plot-pen "turtles"
! e, Q+ C, w' M/ c' A8 r0 h plot count turtles
# \8 E; [ F2 n: a9 I; g3 \ set-current-plot-pen "grass"
{4 L; l9 b5 y4 ]; L7 [$ E4 Y plot count patches with [pcolor = green]
; m p1 {7 @1 F6 ^" F& I2 x- W/ send; l! ?0 d U# h
可是运行时提示no such plot: "Totals"
- H- Z* Z0 F+ m' ~, A7 r) @error while observer running SET-CURRENT-PLOT# i8 `& e' E, u/ a0 L: j1 T$ V
called by procedure DO-PLOTS4 u d" c, Y1 p
called by procedure SETUP0 A8 B" s F, a# X( M" ^, M
called by 按钮 'setup'8 [. f D! m [ e+ }1 v7 ^2 B. h
求大神解答啊 |