我编的程序如下turtles-own [energy]0 X: z8 _# {, ~6 m
to setup
% F2 }1 c9 d2 v0 W8 ]0 O9 E clear-all$ q# W5 D" e* K
setup-patches
9 T1 H: G3 o: J. z create-turtles 100
6 b* S. g7 m/ S5 K do-plots( ?4 t8 W7 K2 B. |
ask turtles [ setxy random-xcor random-ycor ]
/ b, L4 f3 B7 z! `end7 N( X) C, I) K D7 C; O6 u% }
to go+ D% n5 n- r% ~( |& c
move-turtles( R5 b5 v* K) o' |
eat-grass
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check-death. M, e' L( e+ F8 L
regrow-grass+ u6 N9 N- o! {
do-plots
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to move-turtles
/ h6 Y# K6 C/ u* K ask turtles [ U! U, Y4 ^# X2 F
right random 360. f1 W& x/ |4 ^9 ?* A% |- l7 M* U
forward 1+ i$ U% \+ G. w( G: F: ]
set energy energy - 1
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end) y: q9 ^" \* F, E: x
to setup-patches! ^+ p6 Q. {1 K: l" y
ask patches [ set pcolor green ]$ a1 W! q' v' s* h9 Z- f; z: @% X" h
end
% N" k7 J5 Y4 U* w7 H# P1 ^to setup-turtles
! F1 {8 l) Q8 L% B. F create-turtles 1000 y# V4 Z+ t1 ~6 g) K3 ^
ask turtles [ setxy random-xcor random-ycor ]3 U: ^4 x# R2 S7 y5 q2 b* w
end& F" W# t' ?, L4 G9 f
to eat-grass& ?- H9 {5 N3 q0 {
ask turtles [
2 C+ l7 T$ p4 b6 n. v' q9 N: @! y" Y* @ if pcolor = green [
* T6 z# ~8 l0 T; r set pcolor black5 _- {6 y: J. x2 k, d# m# {$ f. q! ^
set energy (energy + 10)1 l7 c% s! X7 D6 x# f3 @- K6 h( i
]
( y( w1 ^, B& u) c ifelse show-energy? [7 p; v! t0 ^: W. l
[ set label energy ]
\# g3 t; Z2 Y! `4 I; K6 I [ set label "" ]
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to reproduce
+ z+ t4 {4 X2 q, Z ask turtles [4 \. d, b- U+ J- b$ d
if energy > 50 [" f2 H+ w6 d1 W5 M7 |
set energy energy - 50
2 D6 o* X& B( O# k! |8 x5 y hatch 1 [ set energy 50 ] h G* H' S5 b% C8 M
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end- ~4 [7 z3 y" I
to check-death
$ ]- S; j" ?' _7 f# l+ B$ S3 ]' W' A ask turtles [
0 Z4 e6 N5 q7 R, N4 ~ `4 r5 K if energy <= 0 [ die ]
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end2 \3 r+ |0 v$ z! r# K" G* }
to regrow-grass
! a" C5 o! x. e5 d4 S ask patches [ ?' q1 ?3 o% @& B
if random 100 < 3 [ set pcolor green ]
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end% j( U2 L, l i; @3 g6 e
to do-plots
& d5 |! L5 \! ?8 Q' b' N set-current-plot "Totals"
# w! U/ S/ C6 O1 n0 ]5 q/ V- K) j7 R5 Q set-current-plot-pen "turtles" L+ W3 a S- G; I) S3 }7 [2 `( z
plot count turtles6 j" F0 C$ I/ f' p5 {: {) f& W
set-current-plot-pen "grass"
2 A8 g! j' S0 y- R6 m plot count patches with [pcolor = green]# m$ X. Q6 I8 I# {1 h
end+ F, z6 O7 j! B8 d* e9 s3 H
可是运行时提示no such plot: "Totals"9 Z! @% G- B+ p5 B
error while observer running SET-CURRENT-PLOT( l& L5 p$ |! \, s$ c
called by procedure DO-PLOTS
" x3 B2 t" ^1 J9 ~ called by procedure SETUP; \* A5 g& ]" b5 M
called by 按钮 'setup'
: w8 y1 C6 Y- z: r+ c s' e( g5 C求大神解答啊 |